[Ticket Question] 24v PIR and contacts

[Secware2]

I am looking for some alarm PIR sensors that will operate on a 24v DC supply
for use on a double-decker bus that is being converted to a Men’s Shed
workshop. The standard bus supply is 24v and the alarm contacts would need
to be either N/O or N/C

as the alarm control panel does not use EOL resistors.

Please could you suggest some suitable devices.

[Secware_Tech6]

Is this internal or external detection

 

But if your using a control panel is this not 12v?

[Shedman]

This is for internal detection.

The alarm controller is designed for a commercial vehicle that runs on a 24v supply.  The supplied sensors are ultrasonic intended for use in the confined space of a truck cab and therefore not suitable for the wide space on a bus with draughts around the doors. The alarm box has auxiliary connections for normally open or closed contacts which the manufacturer has advised could be used with a regular internal PIR that will operate on a 24v supply (but they do not supply)

[StuartSelfMon]

Just use a low cost dc-dc converter to step 24v down to 12v. Easier than sourcing 24v sensors.

[Secware_Tech6]

Agreed I'd look at that even takex max at 18v

You could use optex redwall sensors but they are an external detector. As Selfmon says I'd look to convert down