Mitel MX-ONE Installation Instruction page 43

I B
NSTALLING OARDS AND
43
C
ABLING
Connect the ALU2 board to the MDF according to the cabling list for the site. Use cable
TSR 491 0306 or similar. For an example of connection to the ALU2 board, see Figure
34: MDF Alarms for the Fan Unit BFD 509 08/4 on page 43
a
b
a
b
a
b
a
b
a
b
a
b
a
b
a
b
ALU2
2 x TSR 491 0306/20M
Figure 34: MDF Alarms for the Fan Unit BFD 509 08/4
The Fan unit BFD 509 08/4 has the following alarm indicators:
• Yellow LED
The yellow LED is blinking when the Alarm is activated. The Alarm can be acti-
vated either by heat or lost of one of the -48V feeding.
Fan alarm_A is active when one or more of the conditions is/are:
• -48Va or -48Vb input is too low (towards 0 V) or
• the temperature is above 55 degrees C or
• the temp.sensor fails (out of range) or
• the FAN motor current is out of range or
• the FAN or motor voltage regulation fail
FAN unit BFD 509 08/4
SXK1062097/1
MDF
Violet FAN alarm
Turquoise GND
21/1531-ASP11301 Uen C 2017-03-28
LED
TSR9020274/2200
inputs