Annunciator

Question 1

Describe following components of annunciator system?
-Field contacts

• multiplexers
• central control units(CCU)

Answer 1

FC, changes state based on parameter in field

M, interpret digital input from field contact sends to CCU

CCU, process info from M, makes decision if send alarm signal to rest of system

Question 2

Describe following components of annunciator system?
-Control room events viewer printer

• network
• windows drivers
• annunciator windows

Answer 2

P, provide printed record of events

N, allow sharing and comparison of train inputs

W, produce output to annunciator windows and audible

A, visual alert to operators

Question 3

What will be affected if central control units (CCU) is down?

Answer 3

Event viewer (and printer)
Ronin (x-6000)
Windows drivers (annunciator and alarm)

Question 4

Annunciator system field contacts states if power is lost?

Normally open

Normally closed

Answer 4

N.O.- will fail open (if open or closed)

N.C.- will fail closed (if open or closed)

Question 5

How can you tell if a alarm has reflash capability?

Answer 5

Look in the PK response procedure