
DigitalFlow™ GC868 Programming Manual (2-Channel)
6-4
Chapter 6. Serial Communications
Figure 6-1: Interface Converter Mounting
6.5.2 Point-To-Point
Wiring
Standard factory wiring of the RS485 serial interface is configured for point-to-point
wiring. That is, a single Model GC868 may be wired directly to a single personal
computer. To connect the RS485 serial interface, refer to Figure 6-1 on page 6-4 and
complete the following steps:
Note:
For compliance with the European Union’s Low Voltage Directive (73/23/EEC),
a transparent plastic shroud protects the electrical connections. The shroud
must remain in place, except while wiring the unit. Reinstall the shroud after
the wiring has been completed.
1.
Disconnect the
main power
to the electronics console and open the cover.
2.
Remove the clear plastic
shroud
that covers the electrical connectors.
3.
Using a
twisted-wire pair
, connect the XMT+ terminal of the barrier strip to the
T+/R+ terminal of the PC’s RS485 adapter and connect the XMT– terminal of the
barrier strip to the T-/R- terminal of the PC’s RS485 adapter (see the
documentation provided with the RS485 adapter for details).
- XMT +
Red (XMT+)
RS232 Terminal Block
Standoff
Mounting Bracket
Barrier Strip
LVD Shroud
Green (XMT–)
Grounding
Screw
G N/L2 L1 AC
G – + DC
WARNING!
Dangerous voltages exist within the electronics console.
Do not perform any wiring operations until the main
power to the unit has been disconnected.
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