GE Industrial Solutions Galaxy Vector Rack Mounted Controller J85501M-1 - Manual (Page 74)

Galaxy Rack-Mounted Vector Controller J85501M-1
Appendix A - 4 Communications Issue 2 January 2008
BSM4 Isolation
Board
The BSM4 Isolation Board isolates the RS-232 communication
port of the BUJ from battery voltage. Figure A-3 shows a block
diagram of connections from the BSM4 kit to the BUJ board.
Figure A-3: BSM4 RS-232 Isolation Board Connections Block Diagram
Terminal
Isolated
Terminal
BSM4
BUJ1
GCMx
RS-232 Port
J1
Isolated
RS-232
J100
J3
Power
Data
Digital
Switch
"A" or "B"
J5 "A"
J4 "B"