g)
Secure the unit to the wall with suitable fixings to support an
approximate full assembly weight of 8.6kg.
NOTE: If the unit is to switch heavy non-mains loads, then optional
POWER RELAYS 79908-88NM must be used. The relays may be
installed on the DIN rail inside the unit. The relay unit must include a
serial diode
CAUTION: (Pre November 1996) If a mains supply is to be
switched by the POWER RELAYS, then the relays must be
mounted in a suitable external enclosure for safety reasons.
Two enclosures are available, 19100-04 and 19100-02 that can
accommodate up to 4 and 2 power relays respectively.
h)
Terminate each cable at the entry point.
i)
Fit the interface board inside the backbox using the screws provided.
j)
Connect the incoming cable ends to the appropriate terminals.
k)
Connect the transformer secondary wires to terminal block P7 on the
interface board.
l)
Place the batteries inside the backbox.
CAUTION: 2off 12V @ 2.1Ah Sealed Lead Acid batteries must
be used for the network interface.
cdn21
Figure 14-3 Connections Details
78301-01NM Fire Alarm Interface Unit (Mains powered)
Fuses and locations
78910-03NM Issue 2_10/96
14-3
Senator II Installation Manual