2-2b. CCTV with relay - Event Handler (practice)

System configuration

Exercise

Call buttons:

• Pressing the call button at the Entrance or at the SOS Point should generate a call in private ringing mode to the Control Room.

Relay control:

• A relay output to the CCTV system should be activated when the private ringing starts. There is one relay for each substation. Use the outputs 5 and 6.
• The relay should stay activate until the call is accepted and the conversation is cancelled. (If the call is not answered, the relay must drop when the ringing times out).

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