Specifications

59
Connectors
This Appendix specifies the details of the connectors on the EPC-8A. Please note,
however, that all the connectors adhere to existing standards. The EXM expansion
interface connectors are not defined here; their definition is available upon request.
Connectors on EXMs and the EXP-MX are described in the separate manuals for those
products.
Pins are labeled from the point of view of looking into the front of the connector on
the EPC-8A.
RS-232 Port (COM1)
The RS-232 serial port is a male DB-9 DTE.
RS-422/485 Port (COM2)
The modified RS-422/485 serial port is a female DB-9 connector.
Table C-1. DB-9 Pin-Out
Pin Signal Pin Signal
1 Carrier detect 6 Data set ready
2 Receive data 7 Request to send
3 Transmit data 8 Clear to send
4 Data terminal ready 9 Ring indicator
5 Signal ground
1
5
6
9
Table C-2. COM2 RS-422/RS485 Port Pin-out
Pin Signal Pin Signal
1RTS 6CTS
2DTR 7DSR
3RXD– 8 RXD+
4TXD– 9TXD+
5GND
1
5
6
9
Appendix C
C