Hi all

 

I would appreciate your advice if that's ok. Here's the issue.

 

I have 4 PIR sensors of unknown manufacturer and I want to replace them with Honeywell Dual TEC DT8016F5 sensors.

 

It should be a straight swap I suppose but when I compare the terminal blocks of the two sensors the PIRs have 8 terminals but the Dual TECs only have 6 terminals.

 

I have attached a picture of each terminal block. The blue one is the PIR. The black one is the new Dual TEC.

 

As you can see, the PIR has 4 connections made: 2 yellow to the "Relay" terminals and 2 to the supply terminals.

 

My question is: which terminals on the new Dual TEC terminal block do I connect the yellow "Relay" wires to?

 

I believe that the two "T" terminals on the new dual TEC are tamper terminals and that the terminals I need to use

for the yellow wires are the C and NC terminals. 

 

I also believe that it doesn't matter which of the two existing yellow wires goes to which C or NC terminal.

 

As you can see the tamper terminals on the old PIR are unoccupied. This is why I think the C and NC terminals are the ones

I need to connect these "Relay" wires to.

 

Can anyone confirm my beliefs this or set me straight?

 

There is no wiring information on the documentation that comes with the Dual TEC sensors and I sent Honeywell

a couple of emails to their support email account but nobody responds.

 

If you folks could help me out here I would very much appreciate it. 

 

Thanks and regards

 

Ray Pooley

 

 

 

 

Looks a right mess. No tampers and two (or more?) sensors series on the same zone.

Yes, relay is the same as NC C here.

Old Risco PIR by the looks of it.

agreed

1 minute ago, sixwheeledbeast said:

Looks a right mess. No tampers and two (or more?) sensors series on the same zone.

Yes, relay is the same as NC C here.

Old Risco PIR by the looks of it.

Thanks SWB. I was just wondering about that. I am not a sec installer but I am a mechanical and electrical engineer who is just not familiar with this type of tech application but I was wondering about that as a standard ie: wiring these things in series. In this context it would be more secure if they were all connected in parallel. That way a loose connection doesn't take out all of the sensors. There are 4 PIR sensors and it wouldn't surprise me if they were all in series. I will know when I lift the covers on the other three which I haven't done yet.  But I'm not in a position to make any config changes anyway. All the wiring is buried and it would involve too much upheaval. They are in a busy cafe and it's open 7 days a week. I just need to swap the sensors. Thanks for the confirmation.

1 minute ago, james.wilson said:

agreed

Thanks James. Appreciate it.

there should only be one sensor per circuit.

The PIR (in the first picture) looks like its manufactured by Crow, Im sure I have used these in the past without issue.

37 minutes ago, RayPooley said:

In this context it would be more secure if they were all connected in parallel. That way a loose connection doesn't take out all of the sensors.

In parallel you would have to hope any burglar would trigger all the sensors at exactly the same time.

One Zone, One sensor.

 

39 minutes ago, RayPooley said:

 But I'm not in a position to make any config changes anyway. All the wiring is buried and it would involve too much upheaval. They are in a busy cafe and it's open 7 days a week. I just need to swap the sensors.

Depending on the wiring and the control equipment it could be done in EOL configuration.

5 minutes ago, sixwheeledbeast said:

In parallel you would have to hope any burglar would trigger all the sensors at exactly the same time.

One Zone, One sensor.

 

Depending on the wiring and the control equipment it could be done in EOL configuration.

I'm talking about the power supply. But even if I wasn't I don't agree with your conclusion. If I have a bunch of sensors independently going back to the control unit it would only take one to send a signal back and trigger the alarm.  

12 minutes ago, aissecur said:

The PIR (in the first picture) looks like its manufactured by Crow, Im sure I have used these in the past without issue.

That's good to know. I will check that out. I did try to find one because I wanted to test both of them before going near the system. They are only cheap. No luck though. 

4 minutes ago, RayPooley said:

I'm talking about the power supply. But even if I wasn't I don't agree with your conclusion. If I have a bunch of sensors independently going back to the control unit it would only take one to send a signal back and trigger the alarm. 

 

The power supply is already in parallel there is no other way with wiring shared like that.

If you wire a zone with multiple sensors in parallel you will have to trigger all at the same time to trigger that zone.

3 minutes ago, sixwheeledbeast said:

 

The power supply is already in parallel there is no other way with wiring shared like that.

If you wire a zone with multiple sensors in parallel you will have to trigger all at the same time to trigger that zone.

I am not sure what a "zone" is in this context configuratively speaking so I will take your word for it.