Rockwell Automation 1746-NR4 SLC 500 RTD/Resistance Input Module/ Instructions - Manual (Page 18)

18 SLC 500™ RTD/Resistance Input Module
Publication 1746-IN012B-EN-P - May 2001
Specifications
Electrical Specifications
Backplane Current Consumption 50 mA at 5V dc
50 mA at 24V dc
Backplane Power Consumption 1.5W maximum (0.3 W at 5V dc, 1.2 W at 24V dc)
External Power Supply Requirements None
Number of Channels 4 (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 (between inputs
and chassis ground) > 150 dB at 50 Hz (10 Hz and 50 Hz filter frequencies)
> 150 dB at 60 Hz (10 Hz and 60 Hz filter frequencies)
Normal Mode Rejection (between [+] input
and [-] input) Greater than 100 dB at 50 Hz (10 Hz, 50 Hz filter frequencies)
Greater than 100 dB at 60 Hz (10 Hz, 60 Hz filter frequencies)
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 2.62 Hz at 10 Hz filter frequency
13.1 Hz at 50 Hz filter frequency
15.72 Hz at 60 Hz filter frequency
65.5 Hz at 250 Hz filter frequency
Calibration Module autocalibrates when a channel is enabled or when a
change is made to its input type, filter frequency or excitation
current.
Isolation (optical) 500V dc for 1 min. between inputs and chassis ground, and
between inputs and backplane
Isolation Between Inputs None