Hello! So over a year ago, I obtained a Notifier S5000 FACP from a local school. I went to wire it up and as soon as I applied AC power, there was a loud pop, smoke, and the fading beep of the trouble piezo. Now, I know that the PSU’s circuit breaker tripped and reset it. It blew again. So now I’m stuck in a rut. There are 6 terminals to wire the AC power to, but no identification on inputs/outputs. I have attached a picture of the terminal strip.
Now, where would I insert the three wires coming from the 120VAC power source? That’s where I probably caused the breaker to pop.
If you already blew it and smoke came out, likely the panel is done. Nevertheless, it appears that you have wired the panel correctly, but with two terminals for each AC input it is a bit ambiguous. Is there a transformer nearby in the panel? It is possible that the primary for the transformer goes to the neutral and hot of the 120VAC input and that the chassis ground would connect into the terminal for Earth Ground. Could you post a picture of the whole PCB?
If that picture linked is correct, then I feel that you may have wired up the wrong terminals. I’m not familiar with a Notifier S5000, but the terms Hot and Neutral, in the electrical world, each allude to a specific black line-in power and white “neutral” wire, and as Kcin556 mentioned, it is strange to have two “AC” terminals on a board right next to a terminal which also appears to be a possibility to supply power.
What I know about Notifier would fill a thimble. However, it is common for manufacturers to provide more that one terminal for hot, neutral, and ground so that the AC power can daisy chain to another power supply. Simplex did that on a number of power supplies over the years. 4100 and 4100+ expansion power supplies for example.
That’s exactly why there’s extra terminals – so that extra stuff could be added to the 5000.
To the OP: Did you check all the connections between the power supply (MPS-24A) and the main cpu card (CPU-5000) to make sure they were wired properly according to the manual?
There are several jumper wires that go between the power supply and the CPU card.
However if you let the smoke out you blew something. The System 5000 is a very hard panel to set up and it’s easy to blow something up if you’re not paying attention. However once it is running it is a pretty reliable system.
As for the condition of the power supply, all of the components show no physical damage whatsoever. The only area that was visibly damaged by the spark was the breaker itself. Could it also be that the PSU is not grounded to the chassis correctly? If so, where would the output of the ground feed come from off of the PSU?
The only other transformer in the panel was an auxiliary signal transformer used in the second chassis.
I may have also failed to connect all of the proper jumpers from the PSU to the CPU-5000.
So my conclusion is that I failed to do the following: I failed to properly connect the ground to the chassis/cabinet and failed to connect all of the required jumpers from the PSU to CPU-5000.
Hopefully fixing this will stop the panel from shorting for the third time. I just hope that killing it the second time is an indicator that the breaker has saved all of the other cards…