Rockwell Automation 1746-INT4 Thermocouple/MV Isolated/ User Manual - Manual (Page 79)

79 Publication 1746-UM614B-EN-P - September 2007
Appendix
A
Module Specifications
This appendix lists the specifications for the 1746-INT4
Thermocouple/mV Isolated Input Module.
Electrical Specifications
Physical Specifications
Attribute Value
Backplane current consumption 110 mA @ 5V dc
85 mA @ 24V dc
Backplane power consumption 0.6 W max (0.55 W @ 5V dc, 2 W @ 24V dc
Number of channels 4 (backplane and channel-to-channel isolated)
I/O chassis location Any I/O module slot except slot 0
A/D conversion method Sigma-delta modulation
Input filtering Analog filter with low pass digital filter
Normal mode rejection
(between [+] input and [-] input) Greater than 50 dB @ 50 Hz
Greater than 60 dB @ 60 Hz
Common mode rejection
(between inputs and chassis
ground) Greater than 120 dB at 50/60 Hz (with 1 k
Ω
imbalance)
Channel bandwidth (-3 dB) 8 Hz
Calibration Once yearly, if required
Isolation 1000V transient or 150V ac continuous
channel-to-channel or channel-to-backplane
Attribute Value
LED indicators 5, green status indicators, one for each of 4 channels
and one for module status
Module ID code 3515
Recommended cable:
for thermocouple inputs …
for mV inputs … Shielded twisted pair thermocouple extension wire (1)
Alpha 5121 or equivalent