CABLES AND ADAPTERS
8
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
RTS
CTS
GND
DTR
Tx DATA
Rx DATA
RTS
CTS
DSR
GND
DTR
Rec Line (DCD)
DSR
2
2
Rec Line (DCD)
1
3
5
4
8
5
J1
(RJ45)
J2
(25-Pin
D-Type)
7
6
4
7
3
20
6
7
(9-Pin
D-Type)
(3)
(2)
(7)
(8)
(6)
(5)
(4)
(1)
Figure 1
RJ45-to-D-Type Female Connector Adapter
RTU-to-Modem Connections
Only R&TTE approved modems should be
used to connect the RTU to the PSTN.
RTU-to-Modem Asynchronous Connection
For a 9-pin or 25-pin connection, use the FLN6458 cable kit to connect one of the
MOSCAD-M RTU RS-232 ports asynchronously to a modem. (The RTU serves as
DTE.) The kit includes a cable with RJ45 modular jacks on both ends and an RJ45 to 9-
pin and 25-pin male D-Type adapter (see Figure 2). The possible RTU configurations are
detailed below:
Port No. Configurator Definition
1
RS-232 UART External Dialup Modem (MDLC)
1. Before transmitting, the RTU sends an RTS=on
signal to the modem, and will not transmit unless it
receives a feedback CTS=on signal from the
modem.
RJ45
Connector