Mitel MX-ONE Installation Instruction page 44

5.2
5.3
5.3.1
21/1531-ASP11301 Uen C 2017-03-28
MIVOICE MX-ONE LITE, 3U UNIT, EXTERNAL ALARM
The Alarm Input, which is located on the rear side of the unit, has two pins, 1 and 3,
which can be detected as alarms when either of them is closed to ground. To reach the
connector on the backplane, remove the top cover and break out the small metal cover.
Use a plier and fold back and forth until it breaks off.
Table 15 Rear Alarm Input 87L00039BAA-A
1 2
Alarm A GND
(Relay)
When any of the alarms is activated it will be detected by the MGU boards.
AC/DC UNIT ALARMS
The Alarms can either be connected through the ALU2-board or direct into the
DC/DC-board in the 7U-chassis, or direct into the 3U-chassis.
Connect the AC/DC unit alarm relay contacts to the inputs of the ALU2 board through
the MDF according to the cabling list for the site. The inputs of the ALU2 are internally
tied to -48 V through serial resistors and the board can therefore detect loop or closing
to 0 V. The resistance from the source to the ALU2 input should be maximum 20 kohm.
FOR 51305282
For information, see the documentation delivered with the product. These documents
are also stored in the Alex data base in parallel with this document.
Document name: Aspiro 1U in a 2U Enclosure, Instruction Manual PM110_6500_00,
and Quick Install Guide 100_6500_00-QR
The power system has a set of ports, alarm contacts, located on the rear side, that
reflect different operating conditions for the power supply, see Figure 35: MGU Power
Alarm Detection in MX-ONE Lite on page 45 or Figure 36: Power and Fan alarm in
Classic chassis on page 46 and Supplier Manual. Wires to the different alarm units can
be fastened to the ports.
The communication with the AC/DC-unit can also be done via the PCC unit 51305283.
This unit is Optional. The unit have a RJ45-connector to communicate with the LAN.
3 4
Alarm B GND
(Relay)
A
LARMS
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