FieldServer Optomux FS-8700-17 - Manual (Page 5)

FS-8700-17_Opto22.doc Manual Page 3 of 24
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.fieldserver.com
Tel: (408) 262 2299 Fax: (408) 262 2269 Toll Free: (888) 509 1970 email: [email protected]
3 HARDWARE CONNECTIONS
The FieldServer is connected to the OPTO22 device as shown below.
Configure the OPTO22 device according to manufacturer’s instructions.
- + - + - + - + COM
FH TH
PREVIOUS OPTOMUX
- + - + - + - + COM
AC 30 A / B
- + - + - + - + COM
NEXT OPTOMUX
R2 R1
G
n
d
_ + G
n
d
F
G
_ +
FO TO FH TH FO TO FH TH FO TO
FieldServer
B1 or B2 B1 or B2
RS-485
Opto Isolated
3.1 Connection Notes
 B2 Communication connections are made to the rack (PB4AH, PA8AH, PB16AH), not to the brain board.

COM points must not be connected to Earth Ground.
 Bridging 4-wire RS-422 to get 2-wire RS-485 may not work in certain applications, and in this case it is
recommended that a RS-232 to RS-422 converter is used in between the FieldServer and the OPTO 22 devices .