16 ControlLogix Voltage/Current Input Module
Publication 1756-IN040C-EN-P - October 2000
Remove the Module
1756-IF8 Specifications
Number of Inputs
8 single ended, 4 differential or 2 differential (high speed)
Module Location 1756 ControlLogix Chassis
Backplane Current 150mA @ 5.1V dc & 40mA @ 24V dc
(Total backplane power 1.73W)
Power Dissipation within Module
Thermal Dissipation
1.73W voltage
2.33W current
5.88 BTU/hr voltage
7.92 BTU/hr current
Input Range and Resolution +/-10.25V - 320µV/cnt (15 bits plus sign bipolar)
0-10.25V - 160µV/cnt (16 bits)
0-5.125V - 80V/µcnt (16 bits)
0-20.5mA - 0.32µA/cnt (16 bits)
Data Format Integer mode (Left justified, 2s complement)
Floating point IEEE 32 bit
Input Impedance
Voltage
Current
>1megΩ
249Ω
Open Circuit Detection Time Differential voltage - Positive full scale reading
within 5s
Single Ended/Diff. current - Negative full scale
reading within 5s
Single Ended voltage -Even numbered channels go
to positive full scale reading within 5s, odd numbered
channels go to negative full scale reading within 5s
Overvoltage Protection 30V dc voltage
8V dc current
Normal Mode Noise Rejection
1
>80dB at 50/60Hz
Common Mode Noise Rejection >100dB at 50/60Hz
1. Push in top and bottom locking tabs. 2. Pull module out of the chassis.
20856–M 20857–M
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