Triggering power supply using relay module
Triggering power supply using relay module
(OP)
Hello,
I'm working on an application to install door hold-open devices in a facility which does not have a fire alarm control panel. The facility does have smoke alarms installed. The intention is to remove power to the door hold-open devices during a smoke alarm condition.
I'm planning to power the hold-open devices using a regulated power supply which has a fire/emergency alarm release feature. Then use a relay module between the smoke alarm and the power supply to trigger the power supply to remove power to the hold-open devices during an alarm condition. I've attached the datasheet for the relay module and the regulated power supply for reference. I'd appreciate if I could receive some comments / insights for this design on any operational or compatibility issues.
Thank you.
I'm working on an application to install door hold-open devices in a facility which does not have a fire alarm control panel. The facility does have smoke alarms installed. The intention is to remove power to the door hold-open devices during a smoke alarm condition.
I'm planning to power the hold-open devices using a regulated power supply which has a fire/emergency alarm release feature. Then use a relay module between the smoke alarm and the power supply to trigger the power supply to remove power to the hold-open devices during an alarm condition. I've attached the datasheet for the relay module and the regulated power supply for reference. I'd appreciate if I could receive some comments / insights for this design on any operational or compatibility issues.
Thank you.
RE: Triggering power supply using relay module
The supply DC output is rated at: No more than 650mA usage and the Poly fuse protecting the DC output is rated at 2.5A.
The Kidde output relay (N.C. contact) I presume you're using, is rated at 5A. I see no issue with what you propose as I understand it.
Is 650mA enough to hold all the doors open?
BTW, I would certainly NOT have the normal load on a 650mA supply be more than about 500mA.
Keith Cress
kcress - http://www.flaminsystems.com
RE: Triggering power supply using relay module
I intend to connect six (6), 12/24VDC, 40mA (max) door hold-open devices to the 1A power supply. I expect a max. load of 240mA which should be within capacity of the power supply.
RE: Triggering power supply using relay module
Keith Cress
kcress - http://www.flaminsystems.com