Red Lion G303 3" Monochrome Operator Panel - Manual (Page 5)

RS422/485 COMMS PORT
The G303 has one RS422/485 port. This port can be configured to act as
either RS422 or RS485.
The RS422/485 COMMS and RS232 COMMS ports are multiplexed
because they share the same hardware. Both COMMS ports can be used with
master protocols. However, when the RS422/485 COMMS port is used with a
slave protocol, the RS232 COMMS port is not available.
Note: All Red Lion devices connect A to A and B to B, except for
Paradigm devices. Refer to www.redlion.net for additional information.
5
POWER
CONNECTOR
24V 20%
2 COMMO
N
1
+
N/
C
3
-
(NIC)
ETHERNET
RS232 RS485 RS232
PGM PORT
PORT
COMMS COMMS
PORT
USB
TYPE B
CTS (PIN 1) RTS (PIN 6) TxB (PIN 1) COMM Tx COMM Rx COMM CTS (PIN 1) TxA (PIN 8) Rx
A
Tx
B
TxEN Rx
B
COMM Tx
A
COMM Rx RTS (PIN 6) Tx
GREEN AMBER LE
D
YELLO
W
LE
D
PROTECTIVE
EARTH
GROUND
G303 PORT PIN OUTS
Examples of RS485 2-Wire Connections
G3 to Red Lion RJ11 (CBLRLC00)
DLC, IAMS, ITMS, PAXCDC4C
A+ 4 TxA 2
B- 5 TxB 1
COMM 3 COMM 6
TxEN 2 TxEN 5
Name RLC: RJ11 Name G3: RJ45
Connections
G3 to Modular Controller (CBLRLC05)
TxA 8 TxA 8
TxB 7 TxB 7
COMM 6 COMM 6
TxEN 5 TxEN 5
RxA
TxA
3,2
2,3
RxA
TxA
3,2
2,3
RxB 4,1 RxB 4,1
TxB 1,4 TxB 1,4
Name Modular Controller Name G3
Connections
TX
5V
8
1
7
2
TxB
TxA
130K
130K
5 TxEN (OC)
RX
130K
5V
130K
RxB 4
RxA 3
GND 6
TxEN (OC)
TX/RX
130K
5
TxA
2
8
130K
5V
7
1
TxB
6 GND
RS422/485 4-WIRE
CONNECTIONS
RS485 2-WIRE
CONNECTIONS