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V. TECHNICAL INFORMATION

A. INTERFACES

1. SERIAL INTERFACE
a.RS232
The standard serial interface applicable to PP4000S is
RS232. The communication protocols in RS232 are: 19200 bps,
none parity, 8 data bits, 1 stop bit. These settings are fixed, not for
change. The RS232 connection is done through a 9 pin D sub
female connector with following pin assignments:
Pin # Definition Pin # Definition Pin # Definition
1N.C. 4 DTR 7 N.C.
2TXD 5GND 8CTS
3RXD 6DSR 9N.C.
b.RS422
RS422 is the serial interface applicable to PP4000B. Similar
to RS232, the communication protocols in RS422 are: 19200 bps,
none parity, 8 data bits, 1 stop bit. These settings are also fixed
and not for change. The RS422 connection uses the same 9 pin D
sub female connector used in RS232 with following pin
assignments:
Pin # Definition Pin # Definition Pin # Definition
1RD+ 4CS- 7SD-
2RD- 5GND 8RS+
3CS+ 6SD+ 9RS-