External Fan Assembly; Interconnect; Power Cable Assembly - Alcatel MDR-8000 User Manual

External Fan Assembly

A.1.1
See Figure A-3. The external fan assembly PN 3EM11901ABAA is required for cooling the
CommPak indoor unit equipped with high-power amplifiers, for specific frequency bands,
as follows:
Radio
MDR-8505u
MDR-8506
MDR-8510/8511
The external fan assembly is wired to the CommPak indoor shelf internal fan assembly PN
3EM14510AAAA via cable. The internal fan assembly passes +12 Vdc operating power to
the external fan assembly, and the internal fan assembly passes 12C and alarms from the
external fan assembly.
The external fan assembly mounts to the rack rails directly below the heatsink on the
CommPak indoor shelf with four screws. The external fan assembly cools by blowing air
between the vanes on the heatsink. Fan revolutions are monitored and an alarm occurs if
any one or more fans loses rpm.

INTERCONNECT

A.2
This part of the section gives the location and describes strapping, power connections, signal
connections, status and alarm connections and service channel connections for
the CommPak indoor shelf.

Power Cable Assembly

A.2.1
See Figure A-4 for power cable assembly installation procedures. The MDR-8000 is inter-
nally wired to accept 20.5 to 60 V dc input power with positive or negative ground. To pro-
tect maintenance personnel from lightning strikes, the ground system must be integrated
by bonding station ground and dc battery return together. The dc power connectors J1 and
J2 are located on the rear of the back panel. Install power cables as shown.
Output Power
+30 dBm
+31 and +33 dBm
+29 dBm
Figure A-3 External Fan Assembly
MDR-1025
06/12/04
A-5