Specifications

6. Connectors
This chapter specifies the details of the connectors of the EPC-7.
The DB-9 COM1 serial port connector is defined in the
following table.
66
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 6. DB-9 Pin-out.
1 3 5 7 9
2 4 6 8 10
A second serial port, addressable as PC serial port COM2,
exists in the form of a 10-pin header on the printed-circuit
board near the bottom of the front panel. Pin 1 is the pin
closest to the front panel and the bottom of the EPC-7
printed circuit board. The header is defined in the table
below.
Pin Signal Pin Signal
1 Carrier detect 6 Clear to send
2 Data set ready 7 Data terminal ready
3 Receive data 8 Ring indicator
4 Request to send 9 Signal ground
5 Transmit data 10 Unconnected
Table 7. COM2 10-Pin Header Pin-out.
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