GE 269Plus

GE Power Management 269Plus Motor Management Relay 2- 23
2 INSTALLATION RS485 SERIAL COMMUNICATIONS TERMINALS
2
Connection to the 269Plus is made via a terminal block which can accommodate up to #16 AWG multi-strand
wire.
If a large difference in ground potentials exists, serial communication will not be possible. Therefore,
it is imperative that the serial master and 269Plus slave are both at the same ground potential. This is
accomplished by joining Terminal 88 of every unit together and grounding it at the master only. If a
GE Power Management RS232/RS485 converter is used between the 269Plus and the master, Ter-
minal 88 must not be connected to ground anywhere, as it is internally connected to the master com-
puter ground via pin 1 of the RS232 connector.
Figure 2–15: SERIAL COMMUNICATION LINK WIRING
NOTE