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SIGNAL
GND*
RCV-
XMT+
XMT-
RCV+
GND*
*Connection to Ground is Optional
3.1.2 TERMINAL BLOCK TWISTED PAIR CONNECTION
If your application requires you to connect one or two pairs of bare
wires to the Model 222N9, you will need to access the internal terminal
blocks. The instructions on the following pages will tell you how to
open the case, connect the bare wires to the terminal blocks, and
fasten the strain relief collar in place so that the wires won't pull loose.
Note: The terminal block configurations are different for the
222N9M (male) and 222N9F (female).
1. Open the unit by gently inserting a screw driver between the DB-9
connector and the lip of the plastic case (See below). You don't have to
worry about breaking the plastic, but be careful not to bend the D-sub
connector.
PIN#
1 .........................6
2 .........................4
3 .........................5
4 .........................2
5 .........................3
6 .........................1
1
2
3
4
5
6
XMT
G
RCV
+
-
-
+
222N9M
(Continued)
5
PIN#
SIGNAL
GND
XMT-
RCV+
RCV-
XMT+
GND
RCV
G
XMT
+
-
-
+
222N9F
1
2
3
4
5
6
7
8
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