Rack Mounting

The two L-shaped brackets and the box cover supplied with the master clock can be used to install it in a standard 19-inch (48.3 cm) rack. See Figure 1-3on page 1-7.

To rack mount the clock:

1.Place the master clock on its back with the display unit facing up and the key pad to the right.

2.Remove the two screws securing the display unit to the backbox.

3.Lift the display unit up and away from the backbox. Two rivets at the bottom of the cover will prevent you from lifting it straight up.

4.Unplug the ribbon cable from the back of the display unit to disconnect the power supply.

5.Detach the display unit from the wall mount plate by removing the four screws on the back of the display unit. (IMPORTANT: Do not lose these screws. They are a specific length so they do not interfere with the circuit board inside the display unit. Using any other screws to attach the display unit to the case will void any warranty.)

6.Remove the rectangular knock out near the top of the power supply. See Figure 1-3on page 1-7.

7.Using the four screws removed in step 5, attach the display unit to the bottom of the power supply. To assist you, there are holes opposite the four screw holes where you can fit a #1 Philips screwdriver with an 8-inch (20.3 cm) blade.

8.Reconnect the ribbon cable from the power supply to the display unit.

9.Remove the two screws from one side of the display unit, then use them to attach an L bracket to the side of the unit. See Figure 1-3on page 1-7.Repeat to attach the other bracket to the other side.

10.Mount the unit in the rack.

11.Wire the clock before attaching the box cover. See Wiring the Master Clock on page 1-8.

12.Attach the cover to the power supply using four 6-32 screws. Two of these screws were removed from the display unit in step 2. The other two were supplied with the clock.

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24A715/24A715M Master Clock Installation Manual