14
ASYNC RS-232 TO 2-WIRE RS-485 CONVERTER
When connecting the twisted-pair cable from the
Converter’s RJ-45 jack to the RS-485 device, your cable
must be connected as shown in
Table 4-1
.
Table 4-1. Connecting the Twisted Pair to the RS-485 Device.
Converter
RS-485 Device
Signal
Pin #
RS-485 Signal
N/C
1
GND*
2
N/C
3
XMT+
4 - - - - - - - - - - - - - - - - - - - XMT A
XMT-
5 - - - - - - - - - - - - - - - - - - - XMT B
N/C
6
GND*
7
N/C
8
*Connection to GND is optional
4.2.2 C
ONNECTING VIA THE
T
ERMINAL
B
LOCK
The following instructions 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.
1. Open the case by twisting it open with a small
plastic screwdriver.
2. Strip the outer insulation from the twisted pairs
about one inch from the end. See
Figures 4-2
and
4-3
.
