Owner`s manual

C-1
APPENDIX C: RS232/RS485 ADAPTOR CABLES
General
Note: On all of the Motorola RJ45 connector heads, the numbering of the pins is
different than the standard, as shown in the figure below. Pin 1-8 are left to right
rather than right to left, as shown below. Therefore, only original Motorola cables
should be used.
This appendix provides the information required for connecting an RTU RS232 port to various
units, as detailed below:
• Connection to a computer/terminal (MDLC protocol or User port)
• Connection to a modem (MDLC protocol or User port)
• Connection to the GPS receiver (MDLC protocol)
• Connecting a User port to a printer
• Connecting a User port to an external unit
• Connection to a radio (MDLC protocol)
• RTU-to-RTU connection using MDLC protocol through RS232 ports (RS-Link)
• ACE3600 RTU-to-MOSCAD RTU connection using MDLC protocol through RS485 ports
(RS-Link)
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