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4-7
PG 760 PII Programming Device
C79000-G7076-C766-01
When the PG 760 PII leaves the factory, the COM1 (TTY) serial port is
switched to active (20 mA current loop). If you are connecting two
programming devices via the COM1 (TTY) serial port, you must switch one
of the ports to passive. The PG 760 PII has a switch on its mother board for
this purpose. You must remove the bus card in order to reach this switch.
Change the switch position as shown in the figure below:
No other settings must be changed.
TTY receive
TTY transmit
passive
active
1
2
1 2
OFF
ON
1 2
OFF
ON
Figure 4-4
Switching the TTY Port to Active/Passive
Switching the
PG 760 PII to
Active/Passive
Switch Position
PG 760 PII Expansions