Relay configuration
“Normal” relays
The relay is activated when an alarm occurs and is deactivated when the alarm condition ends.
The variables acting on a relay in alarm status are:
- Alarm delay
- Automatic / Manual acknowledgement
- Forced state change via the CPS menu
- Forced state change via a logic input command
“Buzzer” relays
The “Buzzer” relay is used to control an audible alarm.
It can be re-armed with the [ Acknowledge ] key on the central controller, even if the alarm condition
has not changed.
The occurrence of a new alarm will reactivate the relay and reset the delays.
The “Buzzer” relay can be automatically dismissed before the end of the alarm with a 15 to 900
second delay (standard setting for “Buzzer” relays) or manually, even if the alarm condition has not
changed. It can be configured with a minimum operating time of 1 sec. to 5 min.
The variables acting on a relay after an alarm has occurred are:
- Alarm delay
- Automatic / Manual acknowledgement
- Forced state change via the CPS menu
- Forced state change via a logic input command
Alarm and/or “Buzzer” relay delays
“LS/HS” Relays
Low speed (LS) relays and high speed (HS) relays are always used together, allowing you to control a
parking facility ventilation system at two speeds.
LS (low speed) : The relays are designed to control slow ventilator speed (star-triangle configuration
for a two-speed ventilator).
HS (high speed) : The relays are designed to control high speed ventilator speed (star-triangle
configuration for a two-speed ventilator).
The working logic of the relays defined hereafter, takes into consideration the start-up and shut-down
intervals during which very high levels of current may occur, capable of damaging motor windings if
phases occur in the incorrect sequence.
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