GE Security
FHSD700C Series Product Guide
Detector Access
To gain access to the interior of the detector, first isolate the power supply then remove the front cover.
It is secured by two screws underneath and hinged at the top, allowing complete removal. If the beacon
option is fitted, a cable-loom is attached; this may be unplugged at either end, but it may be easier to
detach/reattach the plug connecting to the main unit.
To access the Fault Relay and other I/O Module connections, the front panel must be dropped down by
loosening the two knurled screw fixings at either side.
As shown in the diagrams in Section
Mounting the Detectors
on page 6, knock-out cable entry points
are provided at the top and left-hand side of the metal back box. Where the field wiring to the unit is not
via conduit tubing, strain-relief type cable glands of a suitable size to fit the 25 mm diameter holes must
be fitted to all used cable entry holes. These cable glands shall be fitted so as to provide strain relief
and ensure that the protective earth connection (where used) is the last conductor to take any strain.
External Power Supply Connection
FHSD700C detectors are powered by an external 24 VDC power supply.
The power supply cable cores should be fitted individually with ferrite cores, close to the cable gland
inside the equipment case. To fit the cables with the ferrite cores, insert the 24V and 0V conductors
through the ferrite cores and wrap around once to provide maximum effectiveness.
Connect the 24 VDC power supply to the 5-way connector (CN2) on the I/O board under the control
panel as shown in Figure 3-5.
1. External Power Supply
2. No
Connection
3. Link
Figure 3-5: 24 VDC connection for FHSD700C Detectors
The MAINS/BAT terminal must be linked to 0 V. Failure to do so may result in a Mains Fault. The VBAT
and BATT TEST terminals should be left unconnected.
Ensure that in the Configuration menu, the STANDBY parameter is set to 0. For more information about
Configuration mode, please see
CONFIGURE: Configuration Mode
on page 21.
Grounding and Fuse Protection
An M5 chassis earthing stud is provided for the grounding of the unit using a suitable gauge of wire or
earth braiding (0.75 mm
2
minimum) to a primary earth point (i.e. copper water pipe or an earth-stake
etc.). This chassis earth should be connected on all DC powered installations.
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