Rockwell Automation 1762-Lxxxx MicroLogix 1200 Programmable Controllers - Manual (Page 111)

Publication 1762-UM001G-EN-P - March 2011
Specifications A-19
Table A.23 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)
Maximum cable impedance 25
Ω (
for specified accuracy)
Open-circuit detection time
7 ms to 1.515 seconds
(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).