This schema is specified in IEEE Std 1641-20XX, "IEEE Standard for Signal and Test Definition." This schema is a World Wide Web Consortium (W3C) Extensible Markup Language (XML) binding of Annex I Extensible markup language (XML) signal descriptions Clause I.2 XML signal schema definitions" The purpose of this schema is to provide unique types and attributes for IEEE 1641 schemas.This schema uses the W3C XML Schema definition language as the encoding. This allows for interoperability and the exchange of signal component instances between various systems.This schema shall not be modified but may be included in derivative works. Copyright (c) 2009 Institute of Electrical and Electronics Engineers, Inc. USE AT YOUR OWN RISK A constant signal retains its given level. the level of the signal. A Step signal makes a transition from zero to a given level. final value of step signal defines when the step transition starts A Single Trapezoid is a non-periodic signal defined by the geometric trapezoid shape. value of pulse amplitude time at which trapezoid starts relative to it initialization time taken to reach amplitude time that trapezoid is stable at amplitude Time taken to fall back to transient state Noise may be considered as unwanted disturbances superimposed upon a useful signal, which tend to obscure its information content. Noise may be genuinely random (as in white noise) or may be pseudo-random. Noise occurs across a range of frequencies and can be characterized by amplitude; it may take the form of a sense or source signal. Pseudo-random noise is only of interest as a source signal, in addition to amplitude it also allows a frequency and an optional seed to be defined used for pseudo-random noise upper bound frequency bandwidth for transient disturbances A Single Ramp represents a linear transition from zero to the defined amplitude level during a defined time period. final value of ramp signal time for signal to reach final value defines when the step transition starts A Sinusoid is a signal whereby the amplitude of the dependent variable is given by the formula: Amplitude Frequency initial phase angle A Trapezoidal Signal is a periodic signal that sequentially repeats the Single Trapezoid. The period is defined by the duration of the Single Trapezoid. All event times are referenced to local time, which is reset at the start of each pulse. value of pulse amplitude time in which the signal repeats itself time taken to reach amplitude time that trapezoid is stable at amplitude Time taken to fall back to transiant state A Ramp Signal is a periodic signal whose instantaneous value varies alternately and linearly between two specified values. Its parameters are defined by its amplitude, the time to rise from zero and the period. final level of the signal time is which signal repeats itself Rise Time of ramp signal A Triangular Signal is a periodic signal whose instantaneous value varies linearly and equally about zero. Duty cycle is a ratio between the time for which it increases to its positive value and the time for which it decreases to its negative value. Its parameters are defined by its amplitude, period and dutyCycle. maximum amplitude level of the signal time in which signal repeats itself ratio between time taken to increase from its minimum to its maximum value and the time for one period A Square Wave is a periodic signal whose amplitude (dependent variable) alternately assumes one of two fixed values of amplitude, the amplitudes are equal about zero which is the reference base line. Its parameters are defined by its amplitude and period. Amplitude of signal period of signal duty cycle of the wave A Waveform is defined by a sampling interval and a list of values. The Waveform cycles through those values sequentially and infinitely, starting from zero. The width of each window is the same, and each window consists of a Ramp Signal. amplitude of the output signal where the level factor (in points) the time between each sequence the time between successive (points) outputs level factor of each waveform sample WaveformStep takes the form of a sequence of constant signals, the level of the constant signal is defined by the points, a transition in level occurring at each increment of the sampling interval. WaveformStep cycles through the points sequentially and continuously. If the samplingInterval is zero, the complete waveform described by the points is repeated per period, otherwise the period is calculated as sampleInterval * number of points. Assigning a non-zero period value sets the samplingInterval to zero. amplitude of the output signal where the level factor (in points) the time between each sequence the time between successive (points) outputs level factor of each waveform sample A BandPass filter passes a set of frequencies from an input signal (with equal gain across all its frequencies) and filters out all frequencies outside of the band. Center frequency of the filter's band Bandwidth of filter. Zero implies narrowest band LowPass Filter suppresses all frequencies above the Bandpass frequency. The LowPass Filter represents a perfect step filter. Cut off frequency filter. Zero implies DC offset HighPass Filter suppresses all frequencies below the Bandpass frequency. The HighPass Filter represents a perfect step filter. Start frequency of filter. Zero implies AC Coupled Notch filter suppresses with equal gain across its frequencies, opposite to BandPass filter Center frrequency of the filter's notch Frequency band of filter. Zero implies minimum band Sum makes signals from other Signals by summing them together. Product makes signals from other signals by multiplying them together. Diff makes signals from other signals by subtracting them from the first signal. The FM is a modulator where the instantaneous frequency of the sinusoidal carrier varies with the amplitude of the modulating input signal. Amplitude of Sinusoidal Carrier wave Frequency of Sinusoidal Carrier Wave Frequency deviation Amplitude modulation where the Amplitude of the sinusoidal carrier varies with as a ratio to the amplitude of the modulated input signal. Modulation Index Phase modulation where the phase of the sinusoidal carrier varies with the amplitude of the modulated input signal. Amplitude of Sinusoidal Carrier wave Frequency of Sinusoidal Carrier Wave Phase deviation The InSignal is delayed to become the OutSignal, where the delay is defined by an initial fixed delay and where the delay may change over time. the rate at which the Rate will alter over time (Acceleration) Fixed delay that signal will be delayed (Distance) the rate at which the Delay will alter over time (Speed) A transformation that multiplies the input signal with a coefficient that decays exponentially over time.. value of damping factor Similarly, we have an exponential operation on signals. This signal takes exp(y), where y is the result of the signal used as input. Ln is a natural logarithmic (inverse exponential) operation on signals. This signal takes ln(y), where y is the result of the signal used as input. Modifies a signal such that its amplitude is the negative of the In signal amplidude Inverse is the mathematical reciprocal of a Signal. Creates a Train of Pulses of the In signal by multiplying the input signal with the amplitude of the pulses. list of pulses Scales the amplitude (dependent variable) of the In signal. Allows both the increase and decrease of the signal. Provides an impedance to load a signal. Limit restricts the values of the signal to ± the limit value. limits the absolute value of the signal to +/- limit value The Fourier Transform converts time domain signals to frequency domain signals. It is more restricted than the other BSC signal combination mechanisms. It uses a number of samples (which is rounded up to the nearest power of two), the time over which the signal will be sampled, and the signal to be converted. Connection is the base class that collects signals into multiple channels List of pin names associated with each channel maximum number of channels allowed to be connected Clock generates an event at regular intervals. Each event is active for the first half of the Clock period. Frequency of the clock. TimedEvent generates an OutEvent at regular intervals. Each event is active for a specific duration, if the duration is longer that than the event interval (Every) the OutEvent is signaled Active at each interval but never becomes Paused. the delay time before the first event will be start the duration that each event is active the time interval for each event PulsedEvent generates an Out event in the form of a sequence of timing pulses primarily intended for use in generating source signals. The sequence comprises a train of N pulses (where N may be any integer greater than zero). Where N is greater than one, the pulses may be of unequal duration and spacing. The pulse train may be either output once or repeated infinitely and continuously for a periodic timing sequence. list of pulses An EventedEvent allows events to be combined to produce complex event streams. An EventCount filters out input events only allowing every 'count' input event. Identifies the number of events that must happen before a event is generated A ProbabilityEvent generates an event stream based upon the event stream present at the In. It will replicate the same timing information but will randomly suppress In pulses. Conceptually, the ProbabilityEvent comprises a random number generator and a comparator. At each event the comparator compares the random number with the value of the attribute 'probability' to determine whether to generate an event in the Out Event Stream. A seed is included so that the user can reliably reproduce test results. The NotEvent is Active when the In Signal is not Active The OrEvent is Active when any in events is Active The XOrEvent is Active when an odd number of in events is Active The AndEvent is Active when all in events is Active For all Sensors every time a measurement is taken, the 'count' property is incremented. A Counter is a sensor that counts when a measurement would be taken, but does not take any specific measurement. Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal Measures the interval between the In/Sync event going Active and the Gate event going Active. Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal Measures the interval between the In/Sync event going Active and the Gate event going Active. Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal Measures the amplitude (value) of the signal in the dimension 'type' at specified instances in time. Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal RMS measures the root mean square value of a signal Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal The arithmetic mean of a set of sampled measurements divided by the total number of samples. The duration of the measurement is either defined by 'gateTime' or by the Gate event (Gated Event Stream), which defines the time over which average measurements are taken The arithmetic mean of a set of sampled measurements divided by the total number of samples. The length of the sample is either defined by 'gateTime' or by the Gate event (Gated Event Stream), which defines the time over which average measurements are taken Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal The peak to peak measurement is the difference between the highest sample value and the lowest sample value. Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal The peak measurement is the highest measurement of the sample. Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal The peak measurement is the highest measurement of the sample. Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal Sensors allow signals to be measured, monitored and compared. A Sensor takes an input signal and generates measurement values. Any Sensor can be applied to any signal, however the resultant value only has meaning when applied to the correct type of signal. Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal Sensors allow signals to be measured, monitored and compared. A Sensor takes an input signal and generates measurement values. Any Sensor can be applied to any signal, however the resultant value only has meaning when applied to the correct type of signal. Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal Measures any control attribute, as opposed to a capability attribute, of a Basic Signal Component or TSF. Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal Attribute of the signal that is to be measured Decode measures the digital stream and converts it via a stream of bits into a required (type). Each measurement is collected in the measurements property and the last value read is available through the measurement attribute. The UL, LL or nominal value can be used where the physical value will be initially converted to measurement type prior to any comparison. If the default encoding (UTF-8) is selected and the data is type string (BSTR), the characters will be represented as UNICODE across the runtime call and will be dependent on the encoding of the XML document for XML static models. Whether the measurement made is of the dependent or independent variable. Current value measured Array of measurements made Number of consecutive measurement to be made. Zero indicates no measurement to be taken and indicates the Sensor is acting as a monitor only Readonly number of measurements currently made Continuous range of independent variable (Time) over which measurement is made. Value against which any condition is checked. This can be either an absolute value (5V) or a ratio value (50%) representing the percentage value between the low-peak and high-peak values. Test made between measurement and nominal value Read Only flag indicating last measurement Pass/Fail Status. If no measurement is taken GO is False Read Only flag indicating last measurement Pass/Fail Status If no measurement is taken GO is False. Read Only flag indicating the last measurement High/Low Status. If no measurement is taken HI is False Read Only flag indicating the last measurement High/Low Status. If no measurement is taken LO is False Upper Limit value against which condition is checked Lower Limit value against which condition is checked reference to a Signal representing signal model of input signal The measurement's resultant variant's datatype Character set used. This attribute allows alternative character set mappings and code pages to be applied SelectIf cycles through its In signals starting from In(1) on each subsequent change of the selector event state (LH). If the selector enters tri-state the output is gated off. The initial state of selector is always is Inactive and the initial output signal In(1) As an example, when there are two Inputs, event state Inactive corresponds to In(1) and Active corresponds to In(2).may have a number of representations. the digital event stream. SelectCase selects the Input that corresponds to the masked Selector value. The mask is converted into bit mask and applied over the Selector digital stream, where channel 1 is LSB. The resulting pattern is converted to a one based index to select the corresponding input signal. When the resultant Selector value exceeds the number of inputs an tri-state output signal is provided. Where the value of a masked Selector channels is in the Z state, an tri-state output signal is provided. selector channel mask, identifies which channels of the selector shall be used to select the input , the value can be expressed as a decimal (13) or hex value (0xC) to identify the binary pattern "1101" selecting channels 1,3 and 4.. A value of 0 implies all channels the digital event stream. The characters represent the digital signals as follows: H logic high (or logic 1) 1 logic high (or logic 1) L logic low (or logic 0) 0 logic low (or logic 0) Z high impedance (absence of logic signal) X unknown or indeterminate logic level Where an external clock is provided at In, this becomes the external clock used as the digital clock rate. The internal clock defined by the period attribute is not used String containing characters 'H', 'L', 'Z', 'X', '0', '1' identifying digital state. Commas or semi-colons may be used to indicate blocks of data Digital Clock Rate Analog Logic High (1) Analog Logic Low (0) Pulse Class type The characters represent the digital signals as follows: H logic high (or logic 1) 1 logic high (or logic 1) L logic low (or logic 0) 0 logic low (or logic 0) Z high impedance (absence of logic signal) X unknown or indeterminate logic level Where an external clock is provided at In, this becomes the external clock used as the digital clock rate. The period attribute is not used. The digital string comprises a list of digital characters separated with delimiters, each comma ',' or semi-colon ';' delimiter is treated as a new step. where each string String containing characters 'H', 'L', 'Z', 'X', '0', '1' identifying digital state. Commas or semi-colons are used to indicate the start of a new parallel pattern. Incomplete strings are assumed to be padded out with 'Z's to the full pattern width. A comma (or multiple commas) at the end of the string indicates that the final pattern is all 'Z's. Digital Clock Rate Analog Logic High (1) Analog Logic low (0) Pulse Class type Encode allows any data representation to be packaged up and streamed as a sequence of parallel bits. It turns messages such as "Hello World" into a bit stream represented by an event where the event state represent the individual bit state. Since the width attribute does not necessarily need to match the data information type, the data is converted into a stream of bits and each bit assigned to consecutive channels such that channel 1 is the LSB and the channel number corresponding to the channelWidth is the MSB. In this way the following are equivalent: data="11010100" type="xs:boolean" data="HHLHLHLL" type="digital" data="C4" type="hex" data="212" type="byte". Each pattern is delivered when In goes Active (1,H). If the input becomes tri-state (Gated Off), the output is Gated off Digital signals are unique in that their values do not take on physical values; rather, they take on event states that can be converted into physical values. The information to be streamed, or the URI identifying location of information. The type of the Variant defines the data type. When using XML descriptions, the attribute datatype shall be used to define a valid datatype The number of output channels. Zero indicates that the number of outputs is the minimum required to represents a complete data symbol the number of times the data is output. Zero indicates that the sequence is repeated indefinitely Used in the XML to define the base type of the data. Character set used. This attribute allows alternative character set mappings and code pages to be applied Connection is the base class that collects signals into multiple channels maximum number of channels allowed to be connected Connection is the base class that collects signals into multiple channels maximum number of channels allowed to be connected Connection is the base class that collects signals into multiple channels maximum number of channels allowed to be connected Connection is the base class that collects signals into multiple channels maximum number of channels allowed to be connected Connection is the base class that collects signals into multiple channels maximum number of channels allowed to be connected Connection is the base class that collects signals into multiple channels maximum number of channels allowed to be connected Connection is the base class that collects signals into multiple channels maximum number of channels allowed to be connected Connection is the base class that collects signals into multiple channels maximum number of channels allowed to be connected Connection is the base class that collects signals into multiple channels maximum number of channels allowed to be connected Connection is the base class that collects signals into multiple channels maximum number of channels allowed to be connected Connection is the base class that collects signals into multiple channels maximum number of channels allowed to be connected Connection is the base class that collects signals into multiple channels maximum number of channels allowed to be connected FourWire is a four-wire connection in which the hi terminal represents the hot, or live, side of a circuit, the lo terminal represents the cold, or return, side of the circuit, hiRef represents a terminal for a reference associated with the hi terminal and the loRef represents a terminal for a reference associated with the lo terminal. maximum number of channels allowed to be connected Connection is the base class that collects signals into multiple channels List of pin names associated with each channel maximum number of channels allowed to be connected