Rs-232 Serial Cables; Figure 3-3 Rj12 Serial Option Wiring - Microcom 485TC Operator's Manual

Chapter 3
3.3.1

RS-232 Serial Cables

The printer uses a standard through serial cable, typically referred to as a modem cable,
which may be purchased through Microcom Corporation or a local computer supply
company.
For a 25-pin serial communication port – Use a 25-pin female to 9-pin male cable.
For a 9-pin serial communication port – Use a 9-pin female to 9-pin male cable.
9 to 9 Pin Cable
DE-9
State Pin # Directions
XX 1 DCD
XX 2 TXD
XX 3 RXD
HI 4 DTR
LO 5 GND
HI 6 DSR
DC 7 RTS
XX 8 CTS
HI 9 +5V
DC = DO NOT CARE
3.3.2 RS-232 Serial RJ-12
The printer is configured with a DB9 RS232 connecter by default but may be also
configured with the optional RJ12 connector. The figure below shows the wiring diagram of
the RJ12 connection.
Pin 1
485TC Operator's Manual - 880058-0100
PC
Signals /
DE-9
Pin #
DCD 1
RXD 2
TXD 3
DSR 4
GND 5
DTR 6
CTS 7
RTS 8
+5V 9
Table 3-1 RS-232 Cable Configurations
9 Pin
RJ12
Figure 3-3 RJ12 Serial Option Wiring
9 to 25 Pin Cable
DE-9
State Pin #
HI 1 DCD
XX 2 TXD
XX 3 RXD
HI 4 DTR
LO 5 GND
HI 6 DSR
DC 7 RTS
XX 8 CTS
HI 9 +5V
XX = INDETERMINATE
RJ12
2 2
3 3
5 4
6 1
8 6
Getting Started
PC
Signals /
DB-25
Directions
Pin #
DCD
RXD
TXD
DSR 20
GND
DTR
CTS
RTS
Signal
TXD
RXD
GND
DTR
CTS
8
3
2
7
6
4
5
-
3-3