Cisco Laser Link Mainframes 安装指南
1-8
General Information
78-4004177-01 Rev D
Laser Link Mini-Mainframe Description,
Continued
Redundant power (supply B) is provided in the form of +24 V DC to the terminal
block of the power distribution board. The connecting point, located on the bottom
rear of the assembly, is labeled J1 and accepts +24 V DC through a 4-pin connector.
The redundant load is also load protected (fuse F1).
Alarm Relay
Normally open and normally closed contact points are available on the alarm relay
(J4) of the power distribution board. These interface points allow you to trigger an
external alarm should the general operation alarm of the mainframe toggle to an
alarm state. The pinout is shown in the following table.
Relay Contact
Condition
Pin
NC
Normal
1
NO
Normal
2
NO
Alarm
1
NC
Alarm
2
Common
3
Status Monitoring
Status of housed modules is supplied to users via front panel LEDs.
Status monitoring signals are routed from the rear of the module to the power
Status monitoring signals are routed from the rear of the module to the power
distribution board. This is accomplished through connection of the power
distribution board’s (HD DB26F) connectors to the individual modules using the
appropriate interface cables.
Integrated Dual Fan Assembly
A dual fan assembly provides cooling for the Mini-Mainframe.
Note: The dual fan assembly is removable from the front of the mainframe.
Note: The dual fan assembly is removable from the front of the mainframe.