QuadTech Guardian 2500 Series Instruction Manual page 74

3.3 RS-232 Interface
An RS232 serial port interface is available as an option to the Guardian 2500 Series,
through a 9 pin DIN connector on the rear panel of the instrument. The RS232 standard
defines electrical specifications for the transmission of bit serial information. The use of
the RS232 port requires three lines, receive data, transmit data, and signal ground. With
some controllers additional signals maybe required and are listed in Table 3-1. Refer to
Figure 3-3 for null modem cable configuration to the standard db9 or db25 connector.
Refer to Table 3-4 for the command set which also applies to the RS232 interface. Each
command line must be terminated with a carriage return (CR) and line feed (LF) and
multiple commands separated by a semicolon. Baud rate for the RS-232 interface is
programmed through the UTILITY menu, refer to paragraph 2.4.7.
parameters are comprised of 8 data bits, 1 stop bit, and no parity.
Page 74 of 74
Figure 3-2
Remote I/O Timing
Note:
Time between UNDER TEST
and PASS or FAIL can be
1-2 msec
Serial port
Interface