CORNING MRU Manuale di installazione dell'assemblaggio - Pagina 9

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10.
PERFORM EXTERNAL ALARM CONNECTIONS
BETWEEN MRUs AND CABINET
Note: Also refer to relevant section of the cabinet installation
manual (i.e., "Connecting Optional Custom Alarms").
Step 1:
For each MRU - connect the external alarms
cable (ordered separately) to the chassis DB-9
"External Alarms" connector.
The connector provides indications for door
opening, heat exchanger (HEX), and one
additional input for future use.
Refer to Table 3 and to Figure 14 for MRU "External Alarms"
connector pinout.
Pin
1
2
3
4
5
6
7
8
9
Table 3. MRU External Alarm Connector Pinout Description
Step 2:
Route the cable alarm wires to the alarm block,
located on the upper right corner of the cabinet.
Step 3:
Connect the external alarm connections to the
cabinet according to the following:
Refer to Table 4 for external alarms cable wiring description.
Color
Red
Green
Brown
Black
White
Table 4. MRU External Alarm Connector Pinout Description
Corning Optical Communications
Description
Common
Not connected
Not connected
Not connected
Not connected
Door alarm
HEX alarm
Future alarm
Exist indication (indicates existing
connection of alarm cable)
Description
+48 V_COMMON
-48 V_EXIST INDICATION
-48 V_DOOR ALARM
-48 V_HEX ALARM
-48 V_FUTURE ALARM
Figure 14. Location of External Alarm Connector
Quick Installation Sheet | CMA-595-AEN | Page 9