Rockwell Automation 1746-NR8 SLC 500 RTD/Resistance Input Module/ Instructions - Manual (Page 16)

16 SLC 500™ RTD/Resistance Input Module
Publication 1746-IN007C-EN-P - December 2002
Specifications
Electrical Specifications
Backplane Current Consumption 100 mA at 5V dc
55 mA at 24V dc
Backplane Power Consumption 1.82W maximum (0.5W at 5V dc, 1.32W at 24V dc)
External Power Supply Requirements None
Number of Channels 8 (backplane isolated)
I/O Chassis Location Any I/O module slot except slot 0
A/D Conversion Method Sigma-Delta Modulation
Input Filtering Low pass digital filter with programmable notch (filter)
frequencies
Common Mode Rejection
(28 Hz and 50/60 Hz Filter frequencies) > 120 dB at 50 Hz (28 Hz and 50 Hz filter frequencies)
> 120 dB at 60 Hz (28 Hz and 60 Hz filter frequencies)
Normal Mode Rejection
(between [+] input and [-] input) 65 dB minimum at 50/60 Hz with 50/60 Hz filter
110 dB minimum at 50 Hz with 28 Hz filter
95 dB minimum at 60 Hz with 28 Hz filter
Max. common mode voltage ±1 volt
Max. allowed permanent overload
(1)
(1) Do not apply a voltage or current to the module.
Volts = ±5V dc; Current = ±5 mA
Input Filter Cut-Off Frequencies 7.80 Hz at 28 Hz filter frequency
13.65 Hz at 50/60 Hz filter frequency
209.6 Hz at 800 Hz filter frequency
1676 Hz at 6400 Hz filter frequency
Calibration Module autocalibrates at power-up. Periodic calibration (every
5 minutes) can also be enabled.
Isolation 500V ac for 1 minute between inputs and chassis ground, and
between inputs and backplane.
5V dc continuous between channels.