Rockwell Automation 1771-IXE/D Thermocouple/Millivolt Input Module User Manual - Manual (Page 19)

2–5 Installing the Thermocouple/Millivolt Input Module
Publication 1771Ć6.5.130 Ć May 1999
Connect your I/O devices to the cat. no. 1771-WI wiring arm
shipped with the module.
!
ATTENTION: Remove power from the 1771 I/O
chassis backplane and field wiring arm before
removing or installing an I/O module.
•
Failure to remove power from the backplane or
wiring arm could cause module damage, degradation
of performance, or injury.
•
Failure to remove power from the backplane could
cause injury or equipment damage due to possible
unexpected operation.
Input connections for the 1771-IXE/D are shown below.
Figure 2.1
Wiring Connections for the 1771-IXE Series D
+
+
–
–
1
Do not use
Short circuit
unused pins
Channel 1
Channel 2
18 Input 1 (+ lead)
17 Input 1 (- lead)
16 Input 2 (+ lead)
15 Input 2 (- lead)
14 Input 3 (+ lead)
13 Input 3 (- lead)
12 Input 4 (+ lead)
11 Input 4 (- lead)
10 Not Used
9 Not used
8 Input 5 (+ lead)
7 Input 5 (- lead)
6 Input 6 (+ lead)
5 Input 6 (- lead)
4 Input 7 (+ lead)
3 Input 7 (- lead)
2 Input 8 (+ lead)
1 Input 8 (- lead)
Terminal Identification
Terminal Function
Wiring Arm
Cat. No. 1771-WI
Connect positive thermocouple leads
to even-numbered terminals, negative
leads to odd-numbered terminals.
Ground cable shield to I/O chassis
mounting bolt.
18
17
16
1
15
14
13
12
11
10
9
8
7
6
5
4
3
2
10527-I
The sensor cable must be shielded. The shield must:
• extend the length of the cable, but be connected only at the 1771 I/O chassis
• extend up to the point of termination
Important: The shield should extend to the termination point, exposing just enough cable to
adequately terminate the inner conductors. Use heat shrink or another suitable
insulation where the wire exits the cable jacket.
Connect Wiring to the
Field Wiring Arm