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Wiring for Auxiliary I/O Terminals
Auxiliary I/O Terminals can be used to provide extra field wiring connections if
needed. They can be attached to either a terminal-style I/O carrier or to
Interposing I/O Terminals. Auxiliary I/O Terminals units are available with 18 box-
style terminals as displayed in the following figures or with 18 spring-style
terminals or 12 barrier-style terminals.
The terminals are electrically tied together. There is no electrical connection
from the I/O Carrier or Interposing Terminals to the Auxiliary I/O Terminals; any
necessary electrical reference must be provided. Multiple Auxiliary I/O
Terminals can be connected to provide the additional wiring terminals that may
be needed for high-density modules, or for 2-, 3-, and 4-wire field devices.
Field
Diagram
Device
1-wire
2-wire
Common
3-wire
Common
4-wire
Common
†
For 16-point modules that only use one row of terminals for point wiring, a shorting bar may be
used to provide extra terminals. Refer to the section , Using A Shorting Bar.
GFK-1504N
Chapter 2 Installation
CLASS I ZONE 2 Ex nA IIC T4 OC Ta
Ex nV II T4 Demko
16 Point Module
Box-, Spring-, or
Connector Carrier
Point
1 Auxiliary
Point
Terminals
2 Auxiliary
Point
Terminals
+V
3 Auxiliary
Point
Terminals
+V
-V
Terminal-Style
I/O Carrier
Auxiliary I/O
Terminals
Auxiliary I/O
Terminals
Barrier-Style
Box-, Spring-, or
Carrier
Connector Carrier
no Auxiliary Terminals
3 Auxiliary
†
Terminals
Terminals *
6 Auxiliary
†
Terminals
Terminals *
9 Auxiliary
†
Terminals
Terminals *
2
Interposing
I/O Terminals
32 Point Module
Barrier-Style
Carrier
2 Auxiliary
3 Auxiliary
Terminals
4 Auxiliary
6 Auxiliary
Terminals
6 Auxiliary
9 Auxiliary
Terminals
2-35
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