2-39
Switcher Option Module Installation
Tally Expansion Option
The Tally Expansion Option provides tally relay closures which allows you
to control remote devices from your Model 2200 Switcher. An unlimited
number of Tally Expansion frames, each with up to three tally modules,
can be added to a switcher.
The Tally Expansion Option consists of the following items:
Two Rack Unit (RU) chassis which has two (redundant) power supplies
mounted on a single sled and three slots for optional Tally Output
modules (068932)
One, two, or three Tally Output modules installed in the chassis
Control cable (16 Meters standard up to 300 meters optional)

Chassis Installation

1. Install the rear supports on the chassis.
2. Install the rear support brackets into the rack.
3. Mount the chassis in a rack as shown in Figure 2-19 on page 2-40.
4. Attach ground wire between ground lug on rear of chassis and station
ground.
Do not apply power to the Tally Expansion Chassis at this time.
Repeat the above instructions for each of the chassis.