Compac CNG Service Manual page 95

Electrical Drawings and Component Details
Comms Dipswitches
ON
ON
Triac Snubber Switches
Compac Industries Ltd.
Dipswitch SW3 on the C4000 Power Supply sets the comms for either the
Compac or Gilbarco protocol.
Locate the dipswitch settings as shown in the diagram below, depending on
which protocol is adopted.
requires an interface PCB, as well as special software and wiring
configuration. The C4000 IS Cable Connections section (see page 114)
contains the Gilbarco wiring configurations.
COMPAC COMMS
1 - ON
2 - OFF
3 - ON
4 - OFF
1 2 3 4
GILBARCO PROTOCOL
1 - ON
2 - OFF
3 - ON
4 - OFF
1 2 3 4
REQUIRES INTERFACE
PCB,
SPECIAL SOFTWARE,
& WIRING
Triac snubber switches are used to switch different snubber circuits across
the solid state relays. On CNG Dispensers, these (SW1, SW2, and SW4)
must always be set to low current output (2).
In addition to setting the dipswitches, the Gilbarco protocol
Page 95
C4000 Power Supply Board
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