Fan alarm and LED interface
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Purpose
An external alarm equipment can be connected to this interface.
Connector data
The fan alarm and LED connector which is located on the fan unit is a 9-pin SUB-D
male connector. The alarm contacts can withstand a maximum voltage of 72 VDC and
a maximum current of 0.5 A. The operating LED voltage is in the range of 36...60
VDC.
Table 4-5 Pin assignment (fan alarm cable)
Point on Connector Signal Name Description
1 FANFAIL_C FANFAIL connection to common point
of fan failure relay
2 FANFAIL_NO FANFAIL return connection to
normally open contact of fan failure
relay (closes in case of failure)
3 MDO1_LED Cathode for MDO 1 LED
4 MDO2_LED Cathode for MDO 2 LED
5 MDO3_LED Cathode for MDO 3 LED
6 FANFAIL_C FANFAIL connection to common point
of fan failure relay
7 FANFAIL_NC FANFAIL return connection to
normally closed contact of fan failure
relay (opens in case of failure)
8 LED_COMMON LED anodes
9 MDO4_LED Cathode for MDO 4 LED
Cable connection
Please connect the fan alarm cable as shown in the figure below.
Figure 4-13 Fan alarm and LED connector
1
6
5
9
System cabling
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365-312-802R7.2
Issue 4, June 2007
Alcatel-Lucent - Proprietary
See notice on first page
4-15
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