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Switching the
When the PG 760 leaves the factory, the COM1 (TTY) serial port is switched
PG 760 to
to active (20 mA current loop). If you are connecting two programming
Active/Passive
devices via the COM1 (TTY) serial port, you must switch one of the ports to
passive. The PG 760 has a switch on its motherboard for this purpose. You
must remove the bus card in order to reach this switch.
Switch Position
Change the switch position as shown in the diagram below:
ON
active
1 2
OFF
Figure 4-4
Switching the TTY Port to Active/Passive
PG 760 Programming Device
C79000-G7076-C761-01
ON
passive
1 2
OFF
No other settings must be changed.
PG 760 Expansions
1
TTY transmit
2
TTY receive
4-7
4
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