LLZ 421
Operation and Maintenance Installation
ILS 420
2−9Ed. 01.04
SOAC
2.4 INSTALLATION AT THE RACK IN THE SHELTER
2.4.1 General
This chapter describes the connections at the transmitter rack: power supply, RF connections, inter-
face connections and connection of a Remote Control (RMMC).
NOTE: For the Thales shelter delivered with the navaids system all fuses are pre−installed. If the
shelter is provided by the customer, he will be responsible for the installation including
a mains fuse box with arrester and a battery fuse box. Following fuse protection is recom-
mended: external mains fuse for transmitter cabinet F= C20A, for battery fuse
F20= K50A (power) and F21= G0.2A (sensor lines), regard also Fig. 2−7.
For a mains voltage of 115 VAC the standard mains wiring concept allows up to 3 ACC54
modules. For a 115 VAC supply with 4 modules provided, standard mains wiring has to
be adapted concerning diameter of supply cables, size of mains terminals and mains filter.
2.4.2 Power Supply
2.4.2.1 Power Connections
See Fig. 2−13, 2−14 and 2−22.
The terminal blocks for electrical and signal connections as listed below are installed on the back-
panel BP−PS and the C−bar, which are located at the lower back side of the transmitter cabinet, or
on the cabinet bottom plate.
Backpanel BP−PS:
− 6 mains terminals N, L1, L2, L3, PE (Protective Earth) and FPE (Functional Protective Earth)
− 1 Speedy connector 10−pin and 26−pin for control signals to/from the BCPS from TX
− 2 single terminal blocks for battery (+ and −), factory wired
− 5 terminals for measuring lines to the battery, factory wired
C−bar:
− 2 single terminal blocks for connecting the battery (+B,−B)
− 5 terminals (2,1, F, F, 0) for measuring lines to the battery BAT2, BAT1, 2 BFUSE and BAT0
− 4 terminals (+D,−D; +R,−R) for connecting collocated DME and Radio Link (RL) equipment
− 2 single terminal blocks (+N,−N; +A,−A) for internal connection, factory wired if need be
Bottom plate:
− 5 mains terminals L1, L2, L3, N, PE
− mains filter with mains terminals 4 In/4 Out/1 PE (european version only)
NOTE: The BCPS is a unit designed for "stationary operation", and its main connection and
protection measures should conform to VDE 0875, Table 2, Paras. 6 and 7. The unit fulfils
the protection class I of EN 60950. The following should be noted in particular:
S A permanently wired mains connection is recommended. The 230 VAC supply system
must be able to supply approx. 110 V in minimum, with an internal resistance of the
supply system < 0.5 ohms.
S If the wiring is not permanent, the plug−in connection must be protected against incor-
rect connection (e.g. Perilex or CEE connectors).
S The ground cable must be laid separately, and connected permanently to the FPE ter-
minal and to the connecting bolt (BSE) of the rack.
S A ground fault interrupter must be provided for a rated fault current of 30 mA.
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