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Switching the
When the PG 760 PII leaves the factory, the COM1 (TTY) serial port is
PG 760 PII to
switched to active (20 mA current loop). If you are connecting two
Active/Passive
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.
Switch Position
Change the switch position as shown in the figure below:
ON
active
1 2
OFF
Figure 4-4
Switching the TTY Port to Active/Passive
PG 760 PII Programming Device
C79000-G7076-C766-01
ON
passive
1 2
OFF
No other settings must be changed.
PG 760 PII Expansions
1
TTY transmit
2
TTY receive
4-7
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