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1995-1997 - INLINE, INC PATHFINDER OPERATION MANUAL - REV2.1A May 19, 1997
Controlling Multiple INLINE Products:
Many INLINE products such as the PATHFINDER, the IN1222/IN1240/IN1422 scan doublers and the
IN1510/IN1540/IN1710 decoders use similar communication protocol structures. By setting each unit to a
different Command Code, up to four INLINE products can be controlled independently by a single RS-232
serial control port (Note: A RS-232 distribution amplifier may be required.)
RS-232 Port Pin-outs:
There are two RS-232 ports on the PATHFINDER. There is a 9 pin D female connector on the front of the
unit, and a 9 pin D male connector on the back. Only one port can be used at a time as both ports are wired
in parallel. If you are using a port to loop out to another device, a RS-232 buffer may be required.
Both ports have the same pin-outs as follows:
Pin # Signal
2 Receive
3Transmit
5 Ground
When using a PC to control the PATHFINDER, you may need to tie certain pins together on the computer
side to activate the serial port. If these pins are not tied together, the serial port will not be active, so no
strings will be sent. The following diagram shows the pins that need to be tied together:
