Rockwell Automation Publication 1766-UM001I-EN-P - June 2015 171
Specifications Appendix A
Maximum overload at input terminals ±35V DC continuous
Cable impedance, max. 25 Ω (Operating with >25 Ω will reduce accuracy.)
Channel to channel isolation ±10V DC
(1) Accuracy is dependent upon the Analog/Digital converter filter rate selection, excitation current selection, data format, and input noise.
(2) Open-circuit detection time is equal to channel update time.
Input Specifications 1762-IR4
Specification 1762-IR4
Input Specifications 1762-IT4
Specification Value
Heat dissipation 1.5 Total Watts (The Watts per point, plus the minimum
Watts, with all points energized.)
Response speed per channel Input filter and configuration dependent.
Rated working voltage
(1)
(1) Rated working voltage is the maximum continuous voltage that can be applied at the input terminal, including
the input signal and the value that floats above ground potential (for example, 30V DC input signal and 20V DC
potential above ground).
30V AC/30V DC
Normal mode rejection ratio 85 dB (minimum) at 50 Hz (with 10 Hz or 50 Hz filter)
85 dB (minimum) at 60 Hz (with 10 Hz or 60 Hz filter)
Cable impedance, max. 25 Ω (for specified accuracy)
Open-circuit detection time 7 ms…1.515 s
(2)
(2) Open-circuit detection time is equal to the module scan time, which is based on the number of enabled
channels, the filter frequency of each channel, and whether cyclic calibration is enabled..
Calibration The module performs autocalibration upon power-up and
whenever a channel is enabled. You can also program the
module to calibrate every five minutes.
CJC accuracy ±1.3 °C (±2.34 °F)
Maximum overload at input
terminals
±35V DC continuous
(3)
(3) Maximum current input is limited due to input impedance.
Input channel configuration via configuration software screen or the user program (by
writing a unique bit pattern into the module’s configuration
file).
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