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DIGITAL 2T-CCMHA-CB Central Office Memory Channel Hub Installation/Service Guide
2.5 Installing the Interlock System
The interlock system helps prevent cabinet instability by allowing only one system at a
time to be pulled out of the cabinet.
The interlock system consists of a vertical rod on which are mounted actuator latches for
each product installed in the cabinet. These actuator latches engage the interlock actuator
bracket on the rear of rackmount systems. When a rackmount system is pulled out of the
cabinet, the actuator latches rotate to prevent any other rackmount system that has an
interlock actuator bracket from being pulled out of the cabinet.
If additional products are installed into the cabinet, actuator latches for those products
should be installed. To install actuator latches, refer to Figure 2-6 and proceed as follows:
1. Remove the screws securing the bottom mounting bracket to the cabinet.
2. Slide the mounting bracket off the bottom of the vertical rod .
3. Slide the actuator latch for the new product onto the bottom of the vertical rod.
4. Slide the stabilizer bracket for the new product onto the bottom of the vertical rod.
5. Replace the bottom mounting bracket and install the screws removed in step 1 but
do not tighten them.
6. Position the stabilizer bracket so that the top surface of the stabilizer bracket is
aligned just below the interlock actuator bracket on the installed system (see bottom
expanded view). This may require the loosening and sliding of other latches and
stabilizer brackets to accommodate the new configuration.
7. Install and tighten the two 10-32 truss-head screws provided to secure the stabilizer
bracket to the rear rail (see bottom expanded view).
8. Position the new actuator latch to properly engage the interlock actuator bracket,
and tighten the two 6-32 set screws to secure the latch (see bottom expanded view).
9. Now tighten the screws to secure the bottom mounting bracket .
The expanded view (A) shows the position of the actuator latches when all systems are
pushed into the cabinet. The expanded view (B) shows the position of all actuator latches
after one system has been pulled out.