MODEL 1000 SEP 2005
SUPPLEMENTAL WIRING GUIDE - SERIAL COMMUNICATIONS
A-11
See Section 3.4.4, this manual, for additional details about serial communications setups at the
GC Controller.
Table A-2. Jumper and Switch Settings for LD485A-MP Line Driver, RS-422 to GC
LABEL POSITION PURPOSE
Front Panel Switch
NORMAL / DLB NORMAL Normal operation used, instead
of loopback testing.
DIP Switch Banks or Shunts
XW1A DCE /
XW1B DTE
XW1A DCE Sets line driver to operate as
data communications
equipment (DCE).
S2 UNTERM No resistor network
termination needed for one PC
direct to one GC.
Jumper Positions
W8 HALF Half duplex operation.
W9 ON No delay, clear to send (CTS)
always true.
W15 A-B RS-485 driver enabled by
request to send (RTS).
W16 A-B Half duplex turnaround delay
at 5ms.
W17 B 100ms Disable timeout delay by
100ms.
W18 B-C RS-485 driver enabled by RTS.
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