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Radio installation
Each different radio or modem will require
slightly different installation methods to be
developed. Refer to Table 2 on page 12 for
allowable radio sizes. A generic approach is
as follows:
1. Remove the radio tray from the RCU.
2. Remove the radio mounting plate from
the radio tray by unscrewing the M5
nuts using an 8 mm socket.
3. The user is to arrange the radio/modem
items, including antenna and surge
arrester in a appropriate way on the
mounting plate. Mark all hole locations
required.
4. Drill holes and deburr edges as required.
5. Assemble radio/modem items to
mounting plate. User to provide
fasteners.
6. Install the mounting plate back onto the
radio tray and tighten in place with the
M5 nuts using the 8 mm socket. Torque
to 26 in-lb (3 Nm).
7. Fit the radio tray back into the RCU
enclosure taking account of antenna
connections and connection to
electronics compartment.
8. If an antenna surge arrester is fitted
(recommended), ground it to the M6
ground stud in the enclosure.
9. Connect the appropriate radio cable
(user to supply or can purchase from
Siemens) to the radio and the
appropriate port on the RCU electronics
enclosure.
The user must ensure that radio/modem selected
has appropriate fire safety ratings, and has no
failure mode that could result in causing a fire.
If the radio uses a power supply from the battery,
the radio cable must be fitted with 6 A fast-acting
fuse in the cable.
B
Item
Description
A
Radio or modem
B
Mounting plate
C
Radio tray
Figure 32: Radio installation example
A
C
37
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