This wiring diagram details typical wiring of an Exidor Electric Panic Bar (24v), with a DG500 Keypad & Prox Reader (12v). This means two power supplies offering two different voltages for each device.
In this example there are no exit buttons etc in place as the Exidor Panic Bar can be operated physically from inside, but should you wish to have an exit button this can easily be incorporated.
When you want to fit access control to a designated escape door with panic hardware fitted, your options become very limited. Luckily, this is where we can help.
In this particular case there's no need for any handy relays etc, as the DG500 keypad offers volt-free relay outputs so we can switch 24v without problems, even though the DG500 unit itself requires 12v DC for its own power source.
With dry relay outputs on the keypad / prox reader, we can give the (positive or negative) applied trigger required by the Exidor push bar in order to trigger the latch to retract. In the example detailed in the diagram, we have gone with a positive applied trigger, which is what the green* wire is for on the lead coming from the Exidor pushbar.
You will see that the 12v PSU is wired directly to the +12v & GND input terminals on the keypad, which gives the keypad the power it needs.
The 24v PSU is then wired directly to the +24v (red*) & GND (blue*) cables for the Exidor pushbar, which gives a permanent 24v DC supply to the unit.
In order for the Exidor push bar to use its power to withdraw the latch, it must be given a momentary trigger - either positive or negative - and in this example as mentioned, we have gone with a positive applied trigger. To do this we have taken a second core of cable from the positive output of the 24v PSU, to the common terminal on the relay output of the DG500, then we come from the N/O terminal (normally-open), to the green* cable on the Exidor pushbar.
Now in terms of operation, when you enter a correct code or use a valid fob with the DG500, that relay output will change state from open to closed, sending the 24v feed straight through to the green* cable on the pushbar, causing it to activate and retract its latchbolt.
It really is that simple! But if you've any queries please do not hesitate to contact us!
* Double-check all wiring specifications / colour coding prior to install as we cannot guarantee colour coding will not change in future revisions of products.