Spectrum Controls 1756sc-OF8H Series A - Manual (Page 29)

Chapter 2: Installing And Wiring Your Module 15
Current Inputs - Current inputs use the terminal block pins labelled IN+#,
IN-#, and I RTN-#. Note that HART communication is only active with
current inputs.
Note: All terminals marked RTN are connected internally.
RTN
IN4+
IN4-
IN5+
IN5-
RTN
IN6+
IN6-
IN7+
IN7-
IN0+
IN0-
IN1+
IN1-
IN2+
IN2-
IN3+
IN3-
I RTN-0
NC
I RTN-1
NC
I RTN-2
NC
I RTN-3
NC
RTN
I RTN-4
NC
I RTN-5
NC
RTN
I RTN-6
NC
I RTN-7
NC
2
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
1
3
5
7
9
11
13
15
17
19
21
23
25
27
29
31
33
35
2 Wire Current Input
2 Wire
XMTR
+
-
24V DC
Power
Supply
+
-
24V DC
Power
Supply
4 Wire Current Input
4 Wire
XMTR
+ +
- -
+ -
Note: When using current inputs, if multiple (-) terminals are connected
together, the channel to channel isolation will be compromised (i.e. this
would be considered a single ended wiring configuration). If a single
ended wiring configuration is to be utilized, the (-) terminals should also
be connected to the RTN to maintain module accuracy.
Differential Current
Channel
Terminals Channel Terminals
Channel 0 IN0+, IN0-, iRTN0 Channel 4 IN4+, IN4-, iRTN4
Channel 1 IN1+, IN1-, iRTN1 Channel 5 IN5+, IN5-, iRTN5
Channel 2 IN2+, IN2-, iRTN2 Channel 6 IN6+, IN6-, iRTN6
Channel 3 IN3+, IN3-, iRTN3 Channel 7 IN7+, IN7-, iRTN7
Differential Voltage
Channel
Terminals Channel Terminals
Channel 0 IN0+, IN0- Channel 4 IN4+, IN4-
Channel 1 IN1+, IN1- Channel 5 IN5+, IN5-
Channel 2 IN2+, IN2- Channel 6 IN6+, IN6-
Channel 3 IN3+, IN3- Channel 7 IN7+, IN7-