Rockwell Automation 1746-INT4 Thermocouple/MV Isolated/ User Manual - Manual (Page 11)

Publication 1746-UM614B-EN-P - September 2007
Module Overview 11
Hardware Features
The module fits into any single slot for I/O modules in either an SLC
500 modular system or an SLC 500 fixed system expansion chassis
(1746-A2). It is a Class 1
(1)
module (uses eight input words and eight
output words).
The module contains a removable terminal block providing
connections for four thermocouple and/or analog input devices.
There are two cold-junction compensation (CJC) sensors that
compensate for the cold-junction at ambient temperature rather than
at freezing 0 °C (32 °F). There are no output channels on the module.
You configure the module with software rather than with jumpers or
switches.
Hardware Features
(1) Requires use of Block Transfer in a remote I/O configuration.
INPUT
CJC A+
CHL3±
CHL3+
CHL2±
CHL2+
CHL1±
CHL1+
CHL0±
CHL0+
Do Not
Remove
CJC A±
Do Not
Remove
CJC B±
Do Not
Remove
CJC B+
Do Not
Remove
MODULE ST A TUS
0
1
2
3
CHANNEL
ST A TUS
THERMOCOUPLE/mV
ISOLA TED
ISOLA
TED THERMO
C OUPLE / mV INPUT MODULE
Do Not
Connect
Do Not
Connect
Do Not
Connect
Do Not
Connect
Do Not
Connect
Do Not
Connect
Side Label
Self-locking Tabs
Do not connect to
this terminal.
Cable Tie Slots
CJC Sensors
Removable
Terminal Block
Module Status
LED (Green)
Channel Status
LED Indicators
(Green)
Door Label
Hardware Features
Hardware Function
Channel status LED indicators Display operating and fault status of
channels 0, 1, 2, and 3
Module status LED Displays operating and fault status of the
module
Side label (nameplate) Provides module information
Removable terminal block Provides electrical connection to input
devices
Door label Permits easy terminal identification
Cable tie slots Secure input wiring at the module
Self-locking tabs Secure module in chassis slot