C.10 Option 17: Parallel BCD Output and Second RS-232C Port 131
RS-232C
Output Type: CMOS, -12 to +12 volts.
Input Type: Standard RS-232C levels.
Inputs Available:
Receive Data (“RXD”): Connector pin 4. Receives data from external device.Requires
that JMP3 be set to position “B”. Precludes use of digital
signal output 2 or parallel data bit 27.
Data Terminal Ready
(“DTR”):
Connector pin 3. Informs clock that remote device is ready
to receive data.Requires that JMP5 be set to position “C”.
Precludes the use of digital signal output 4, analog signal
output 2, or parallel data bit 45.
Outputs Available:
Transmit Data (“TXD”): Connector pin 29. Sends data to external device.Requires
that JMP2 be set to position B. Precludes the use of digital
signal output 1 or parallel data bit 19.
Data Set Ready (“DSR”): Connector pin 28. Informs the remote device that clock is
prepared to send data.Requires that JMP4 be set to position
“C”. Precludes the use of digital signal output 3, analog
signal output 1, or parallel data bit 44.
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