CABLES AND ADAPTERS
10
RTU-to-RTU Connection
RTU-to-RTU Asynchronous Communications Connection
This section provides data on the cable (not supplied) recommended for the RTU- to-
RTU RS-232 asynchronous interconnection (refer to Figure 3). The following table
defines the RTU port for this connection type.
Port No. Configurator Definition
1B
RS-232 UART RTU-to-RTU (MDLC)
2
RS-232 UART RTU-to-RTU (MDLC)
When the connector is facing upwards, the left-hand
pin is Pin No. 1, and the right-hand pin is Pin No. 8.
Tx DATA
Rx DATA
CTS
GND
Tx DATA
Rx DATA
GND
RTS
+12V
1
1
+12V
2
2
3
3
4
4
J1
(RJ45)
J2
(RJ45)
5
5
6
6
7
7
8
8
RTS
DTR
DTR
DCD
DCD
NOT CONNECTED
NOT
CONNECTED
CTS
Figure 3
RTU-to-RTU RS-232 Asynchronous Communications Cable
RJ45
Connector
