Rewiring alarm with power connected

[arnoldh]

I have an existing Securit 800L system. I want to add a second door to the final exit circuit, and also an extra PIR. If possible I want to do this without the SAB going off and annoying the neighbours. I definitely can't access the bell at the moment because there's building work going on.

If I remove mains and battery power from the control panel I should be able to silence the bell by connecting its hold off terminals direct to the battery. However I may want to power up and down a few times. I'm wondering about making things easier by doing the rewiring leaving battery power on to the control panel (mains disconnected).

I'll have to remove a couple of cables and add four and the wiring is fairly tight inside the panel. Is it inadvisable to do the rewiring with power on?

 

[bernardgreen]

Is it inadvisable to do the rewiring with power on?

Re-wiring with the power on can be done. but best to have a large supply of spare fuses and to be really safe a couple of spare panel PCBs......

 

[arnoldh]

Is it inadvisable to do the rewiring with power on?

Re-wiring with the power on can be done. but best to have a large supply of spare fuses and to be really safe a couple of spare panel PCBs......

Yes, I think you're right. I wouldn't normally work on an electronics board that's got power.

Someone told me that my Securit 800L loses the programming settings if I remove power. I don't think this is the case. Does anyone know for sure?

 

[sparkymarka]

What! tight inside an 800L you must be kidding ! Lol
Are you sure it's not 802 plastic on board panel ?

 

[arnoldh]

What! tight inside an 800L you must be kidding ! Lol
Are you sure it's not 802 plastic on board panel ?

To get the extra cables through the existing hole in the case, I'll have to force them through. I agree there's a lot of space inside the case

 

[sparkymarka]

As in the massive oval cable entry that runs across the middle of the panel ?

 

[arnoldh]

As in the massive oval cable entry that runs across the middle of the panel ?

Do you know if I'll lose the programming settings if I remove power from the board?

 

[sparkymarka]

No.