GE DigitalFlow GF868 Programming Manual page 91

6.5.3a Reconfiguring a Serial Interface Converter
To reconfigure a serial interface converter for multi-point wiring, complete the following steps:
1. Disconnect the main power to the electronics console and open the cover.
WARNING! Dangerous voltages exist within the electronics console. Do not perform any wiring
operations until the main power to the unit has been disconnected.
2. Remove the clear plastic shroud that covers the electrical connectors.
3. Remove the serial interface converter mounting bracket by removing the standoff located just below the
terminal block and the grounding screw just to its left (see Figure 9 on page 79).
4. Loosen the two screws that fasten the
converter from the bracket.
5. Use a small screwdriver to pry open the plastic case of the serial interface converter, as shown in Figure 10.
The serial interface converter contains a main printed circuit board and a daughter printed circuit board. The daughter
board has a small terminal block attached to it and the main board has a
the board.
6. Locate the switch assembly on the main board, and move the switch in position 1 from ON to OFF. The standard
ON state for this switch is for point-to-point operation, while the OFF state is needed for multi-point operation. See
Table 23 on page 82 for the proper settings of all four switches on the switch assembly.
DigitalFlow™ GF868 Programming Manual (2-Channel)
DB9
connector to the mounting bracket, and remove the serial interface
Screwdriver
DB9 Connector
Figure 10: Opening the Converter Case
Chapter 6. Serial Communications
DIP SW1
switch ( ) mounted near the center of
Plastic Case
Mounting Screw
RS232
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