TTK FG-SYS - Page 22

22
3.4 FG-DOD - OD Bus Interface
The OD Bus Interface box makes it possible to integrate FG-OD cables on a standard TTK Bus
installation with water/acid sensors. The box is provided with three cable glands: ‘INPUT’, ‘OD BUS’
and ‘‘OUTPUT’.
FG-DOD Diversion Box Diagram:
INPUT OUTPUT2
FROG-SYS
TTK
AMONT
DERIVATION
AVAL
FG-DOD
OUTPUT1
The connection diagram is located on the box packaging.
See below for instructions on how to connect the FG-OD cables to the main bus wire.
The INPUT is linked to the Belden cable coming from the FG-SYS Digital Unit, or from a previous box
OD BUS is linked to the FG-OD sense cables (10x max per FG-DOD box)
OUTPUT corresponds to the Belden cable towards the end of the circuit.
CAUTION: When an output is not being used (for example OUTPUT on the last box), a shunt is
needed between A and B.
CAUTION: Installation of the FG-DOD Interface box must ONLY be performed when the FG-SYS
Digital Unit is switched off.
Red
Black + Shielding
White
Green
A
B
C
D
OUTPUT
OD BUS
D C B
D
C
B
A
Green
White
Black
Red
Red
Black+Shielding
White
INPUT
To the FG-OD sense
cable, with the FG-
CLOD leader cable
FG-DOD
OD Bus Interface