TTK FG-SYS - Page 11

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2. One or more Digital FG-OD kits for FG-SYS (up to 40x FG-OD cables per circuit)
3. One or more additional FG-OD sense cables (max 10 FG-OD per FG-DOD)
To connect the FG-SYS Digital Unit, follow the FG-SYS installation instructions guide in chapter 1.3 of
this document.
FG-SYS haves a capacity of 40x FG-OD cables per circuit. Those cables must be connected to the
panel through a FG-DOD bus interface by groups of ten cables maximum.
Example: 4x FG-DOD with 10x FG-OD cables each = 40x FG-OD
Or: 8x FG-DOD with 5x FG-OD cables each = 40x FG-OD
Or: 2x FG-DOD with 10x FG-OD cables each + 4x FG-DOD with 5x FG-OD cables each = 40x FG-OD
CAUTION: The FG-SYS power supply must be switched off.
1. Connect the Belden 8723 cable to circuits 1, 2 or 3 in the FG-SYS Digital Unit:
On circuit no.1:
Green wire: Point 1A
White wire: Point 1B
Black wire: Point 1C
Red wire: Point 1D
2. Connect the other end of the Belden jumper cable to the INPUT points of the first FG-DOD interface
box.
3. Take the FG-CLOD 3.5 m leader cable and connect it to the following points of the ‘OD BUS’
terminal of the first FG-DOD interface box:
White wire: Point B
Black wire: Point C
Red wire: Point D
4. Fix the provided hold-down clips (1 clip per meter) and place the FG-OD sense cable in the clips.
5. Connect the FG-OD cable to the FG-CLOD leader cable, then add a second, third… FG-OD cable
(10x max) and put the FG-TMOD end plug at the end of the last FG-OD cable.
6. 7. Pour some light Naphta on the cable to simulate a leak alarm.
7. ‘OUTPUT ’ is reserved for the neutral cable going towards the next detection zones.
8. Proceed as with stage 2 for the second (and third etc.) FG-OD kits.
9. Note: on the last FG-DOD diversion box, a bridge must be installed on the unused ‘OUTPUT ’
terminal between points A and B.
OPERATION AND MAINTENANCE
The FG-OD sense cable is insensitive to the limited presence of conducting liquids (water, bases or
acids); FG-OD is also insensitive to any residual traces (lower than 35 ml) of non-conducting liquids
(hydrocarbons or solvents). The sense cable absorbs this limited presence of liquid and does not
react.
In the presence of a quantity (at least equal to 50 ml) of non-conducting liquids (hydrocarbons or
solvents), the FG-OD sense cable activates an alarm on the Digital Unit.
FG-OD cables are reusable after a limited contact with hydrocarbons. Immerse the cable in light
Naphta during 30 minutes, then remove and allow to dry for few hours.