Appendix C: Accessories, Adaptors and Cables
C-2
Connection to a Computer or Terminal
To connect one of the RTU RS232 ports to a computer/terminal, use the FLN6457B adaptor,
which ends with the female 25-pin or 9-pin, D-type connector. The port may be defined either
as a MDLC protocol port or as a User port.
The signals that appear on the female 25-pin or 9-pin D-type connector are according to the
RS232 standard – see the following table. In this case, the RTU serves as DCE (Data
Communication Equipment).
RS232 Function 8-pin
Connector (on
RTU)
25-pin Female 9-pin Female Direction
TX-DATA
2 ←
2 3 from DTE
RX-DATA
1 →
3 2 to DTE
RTS
5 ←
4 7 from DTE
CTS
8 →
5 8 to DTE
DSR
7 →
6 6 to DTE
GND 4 7 5 -
DTR
3 ←
20 4 from DTE
DCD (Rec line)
6 →
8 1 to DTE
To extend the cable, you may use any extension cable with male and female D-type connectors
(connected pin-to-pin, not crossed).
Note: When a User port is defined as Computer/Terminal with DTR support:
The RTU will not transmit unless it receives DTR=ON from the computer/terminal.
The RTU will not receive unless it receives RTS=ON from the computer/terminal.
To connect the RTU USB device port (DU1) to a computer, use a standard USB 2.0 A to B
device cable. Connect the USB 2.0 standard A (male) USB plug on the PC/host side and the
USB 2.0 standard B (male) plug on the RTU side. All standard cable restrictions (e.g.
maximum length of 5 meters) apply.
To connect the RTU to a PC via the Ethernet port, see ACE3600 RTU-to-PC Ethernet Port
Direct Connection without Hub.
Connection to a Modem
To connect one of the RTU RS232 ports to an RS232 modem, use one of the adaptors
provided in kit FLN6458B (option V213AE):
• 9-pin adaptor for Async (#0189968V32)
• RS232-E adaptor (#0189968V33) as in Connection to IDEN Radio below.
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