Rockwell Automation 1746-NT4 Series B,D17466.6.1 SLC 500 4-Channel Thermocouple/mV Input Module User Manual - Manual (Page 97)

1 Publication 1746-UM007C-EN-P - July 2004
Appendix
A
Specifications
This appendix lists the specifications and input resolution curves for
the 1746-NT4 4-Channel Thermocouple/mV Input Module.
Electrical Specifications
Specification Value
Backplane Current
Consumption 60 mA at 5V dc
40 mA at 24V dc
Backplane Power
Consumption 0.8W maximum (0.3W @ 5V dc, 0.5W @ 24V dc)
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
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)
Common Mode Rejection
(between inputs and chassis
ground) Greater than 150 dB at 50 Hz (10 Hz, 50 Hz filter frequencies)
Greater than 150 dB at 60 Hz (10 Hz, 60 Hz filter frequencies)
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 at power-up and whenever a channel
is enabled.
Isolation 500V dc continuous between inputs and chassis ground, and
between inputs and backplane.
Maximum
Channel-to-Channel
Common-Mode Separation Series B or later: 2V maximum between any two channels
Series A: 0V separation