MANUAL P/N 900000165 REV H
4.4 User port
The user port is used for system recovery (see Appendix A) and diagnostics. It can also be
factory configured for serial time of day message output. Contact sales for details.
The user port is either a 9 Way D type Socket. Its Pin assignments are shown below:
Serial port 1
Pin 2 Data Out (RS232)
Pin 3 Data In (RS232)
Pin 5 Signal Ground
All other Pins have no function and are open circuit.
Or a 15 way D-sub, In this case dry-contact alarms and an additional RS422 serial timecode
output are provided. The pin connections are as follows:
Alarms Serial port 1 Serial Port 2
pin 1 Power common
pin 2 Power normally closed
pin 3 Data in (RS232)
pin 4 Data out + RS422
pin 5 Signal Ground
pin 6 Status common
pin 7 Status normally closed
pin 8 Data out (RS232)
pin 9 Data out - RS422
pin 10 Data in + RS422
pin 11 Sync common
pin 12 Sync normally closed
pin 13 Signal Ground
pin 14 Data in - RS422
pin 15 Signal Ground
Serial port 1 has a configuration depending upon any factory configured serial time-of-day
message. Without this serial message the port configuration is
115.2baud, 8 bits/char, no parity, one stop bit,
Serial port 2 when enabled has a fixed configuration of
4800 baud, 8 bits/char, no parity, one stop bit.
The message can be one of the following and the same on both ports:
GPRMC
TFS Message 1, byte sequence:
centiseconds sec min hour weekday day month year 0 0 0x3f 0xff
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