Thales 421, Operation And Maintenance, Page: 38 / 256

LLZ 421
Installation Operation and Maintenance
ILS 420
2−10
Ed. 01.04 SOAC
The connection must be done in the following sequence:
WARNING
Before connecting the cables check that the mains lead is dead and that the battery is
not connected.
− Set the ON/OFF switches of the ACC 54 units to OFF. Remove the units.
− Open the rear panel. Check tight fitting of all internal cable connections to the terminal blocks.
− Connect a cable between the terminal FPE and the potential equalization bus.
− Connect the mains leads (nom. 115 to 230 VAC/50 Hz, single phase) to the terminals designated
L1, N and PE located on the bottom plate. The further wiring to the backpanel BP−PS connection
plate is factory wired. It may be fed via a mains filter installed on the bottom plate (European version
only). The protective earth should be connected to PE.
− Connect the cables to the battery terminals BAT+ and BAT− located on the C−bar taking care
not to connect them the wrong way round.
− Connect the measurement lines to the battery terminals BAT0, BAT1, BAT2 and BFUSE (2x) lo-
cated on the C−bar if an auxiliary contact is available on the battery main switch.
− Connect the ground bolt (BSE) of the rack (Fig. 2−13, 2−22) to the ground points and/or the po-
tential equalization bus of the shelter.
2.4.2.2 Connection of Battery Set
CAUTION
When connecting the DC supply observe the correct polarity (+ and −).
The battery set is connected via two pvc−insulated copper cables as per DIN 57281 with a cross−
sectional area of 16 mm
2
. The length of this connection is restricted to a maximum of 10 m for electrical
reasons. Connect the leads to the terminals BAT (+) and BAT (−) on the C−bar. In order to protect
the battery, the positive line must have a 50 A fuse, if the battery monitoring program is used, and
an automatic overcurrent device (50 A DC) with signalling contact. Connect the signalling contacts
to the terminals BFUSE of the measuring line connector. Install the following cables for measuring
purposes:
− from battery plus−pole via terminals of fuse switch F21 (in fuse box) to terminal BAT2 of measuring
line connector
− from the middle of the battery set via terminals of fuse switch F21 (in fuse box) to terminal BAT1
of the measuring line connector
− from battery minus−pole via terminals of fuse switch F21 (in fuse box) to terminal BAT0 of the mea-
suring line connector
2.4.2.3 Connecting other Installations
See Fig. 2−12.
Wire connections should be made between the terminals shown in the table below when the system
is collocated with DME and Radio Link (RL) equipment.
Device TX rack C−bar Cabinet
DME DME+ and DME− Ground
Radio Link RL+ and RL− Ground
Fig. 2−12 Cable connections with collocated DME and RL equipment
Ed. 07.08