Manual

Module Specifications
This appendix lists the specifications for the 1756sc-IF8u Universal analog
Input Module.
Electrical
Specifications
Backplane Current Consumption 230 mA at 5 VDC
75 mA at 24 VDC
Backplane Power Consumption 3.00W maximum (0.6W @ 5 VDC, 2.4W @ 24 VDC)
Number of Channels 8 (backplane and channel-to-channel isolated)
I/O Chassis Location Any I/O module slot
A/D Conversion Method Sigma-Delta Modulation
Input Filtering Low pass digital filter with programmable notch (filter)
frequencies
User defined digital filter
Normal Mode Rejection (between 64.5 dB at 50 Hz, 60 Hz with 10 Hz filter selected
[+] input and [-] input)
Common Mode Rejection (between 96 dB at 50 Hz, 60 Hz with 10 Hz filter selected
inputs and chassis ground)
Input Filter Cut-Off Frequencies
7.8 Hz at 10 Hz filter frequency
39.2 Hz at 50/60 Hz filter frequency
65.54 Hz at 100 Hz filter frequency
163.9 Hz at 250 Hz filter frequency
659.7 Hz at 1000 Hz filter frequency
Calibration Module autocalibrates at power-up and
periodically afterwards*
Input Overvoltage Protection ±14.5 VDC continuous
250W pulsed for 1 msec.
Input Overcurrent Protection 28 mA continuous
40 mA, 1mS pulsed, 10% duty cycle maximum
Isolation 1000 VDC continuous between inputs and chassis
ground and between inputs and backplane.
12.5 VDC continuous between channels
* User defineable
Appendix A