15 Installation Guide Doc. version 2.0
Making insulation checks FireClass Panels and Repeaters
M20 cable gland with a locknut. Leave generous
tails of wire (approximately 600 mm length).
3 Connect the loop wiring tails to a strip type connec-
tor block, with screw terminals, as shown in Fig. 11.
Leave the wiring loose within the panel.
4 Ensure that the loop screens and metal sheath are
not connected to the addressable loop conductors
and are left floating relative to earth.
6.1.1 Interface conventional detectors
If necessary, use a FC410DIM or FC410DDM interface
unit to interface conventional detectors on a loop spur.
For details refer to the documentation for the FC410-
DIM or FC410DDM unit.
6.2 Making insulation checks
1 Note that a record should be made of the measure-
ments below, to be handed over to the customer.
2 Ensure your insulation checks will be at 500 V (set
your meter accordingly).
3 Make the usual insulation measurements. For exam-
ple measure the resistance between the two wires
of the loops, and the resistance between the loop
wires and earth.
4 For values less than 1 MOhm this is a failure and the
panel will not operate. In this case investigate and
correct the problem.
5 For values between 1 MOhm and 30 MOhm, inves-
tigate and try to increase the resistance value to
30 MOhm.
6.3 Wiring the remaining
modules
At this stage, wire the remaining modules and isolator
bases into the loops.
6.4 Measuring loop resistance
1 Note that a record should be made of the measure-
ments below, to be handed over to the customer.
2 Make the usual loop positive resistance measure-
ments.
3 Check whether the values are acceptably close to
the anticipated values calculated at the design stage.
4 Remove the temporary connections that you had
made to the connector block. Refer to Fig. 11.
6.5 Connecting the loops fully
1 Wire the loop wires into their connectors. Refer to
Fig. 12.
For the pin-out details, use labelling for the loop con-
nections on the board. The loops are connected to
the FC-FI or the FC-FI-1 board depending on the
panel. The FC602S and the FC602S Scandinavian
use a FC-FI-1; the FC604S and the FC604S Scandi-
navian use a FC-FI board.
2 Plug the connectors to their board sockets.
Fig. 11: Temporary Loop Connection
The dashed lines represent loop wiring
NOTICE
There is danger of damage to equipment. Before
using a high-voltage insulation tester, ensure that
no devices liable to be damaged are fitted to the
circuit. This includes isolator bases and ancillary
modules.
Fig. 12: Loop Wire Connector
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