Functional Description, TTY Loop Monitor Assembly.

TM 11-5895-1123-34

Circuit breaker CB1 controls the 115 vac line voltage to

2-8.

Functional Description, TTY Loop Monitor

the -48 vdc generator No. 1 and circuit breaker CB2

Assembly.

controls the 115 vac line voltage for -48 vdc generator

No. 2. The voltage and current of the power supplies

The TTY loop monitor assembly, located in rack 7,

can be monitored by the 48 vdc monitor meters M1 and

monitors the high level TTY loop currents and low level

M2 located on the front panel of the control monitor

TTY circuit voltages. The assembly contains two

assembly. If a malfunction develops with the online

monitoring meters, loop current and low level TTY

power supply, the associated faulty indicator will light, the

voltage, and associated selector switches permitting the

audible alarm

will sound, and the load will be

operator to observe the signal characteristics on all TTY

automatically transfered to the standby power supply.

circuits processed within the CSS equipment.

c. The 20-Hz generators are both online simulta

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Functional Description, Control Monitor -

neously, as indicated by their ON LINE indicators being

48V/20 Hz Assembly

lit.

If a malfunction should occur in one of the

a. The purpose of the Control Monitor -48V/20 Hz

generators, the fault indicator associated with that

assembly is for the control and monitoring of the two -48

generator will light the audible alarm will sound. The

volt power supplies and the two 20-Hz generators. Both

defective generator can be put offline by placing its

power supplies and 20-Hz generators are online

power switch in the OFF position.

simultaneously.

b. The 115 vac line voltage for the power supplies

is coupled through the control monitor power sup plies.

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