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P300H P300 Series Modem Installation and Operating Handbook Page 179
APPENDIX B: MODEM CONNECTOR PINOUTS
REMOTE M&C (RS485/RS232) CONNECTOR
The selection of RS232 or RS485 must be made via the front panel. Refer to Appendix D for an overview
of the Remote M&C protocol.
Connector type: 9 Pin `D' Female, pin compatible with `SA-bus`
Pin Direction
Signal Name-
name RS232
Name-RS485
SA Bus Paradise
1 Shield/Gnd * Shield Shield/Gnd Shield/Gnd
2SRR--
3 Master-B + to modem SSD RX-B -
4 Slave-B + from modem SRD TX-B -
5 Shield/Gnd * SG Shield/Gnd Shield/Gnd
6 Slave-A - from modem RC TX-A Tx. data
7SRS--
8SCS--
9 Master-A - to modem SC RX-A Rx. data
* Pins 1 & 5 are both grounded on the modem (ie Shield and Ground are interchangeable).
See also the “M&C Appnote” available from www.paradisedata.com.