Access control card reader, I believe everyone is familiar, but how many people know the way Metal Access Control wiring? The following small series will give you a detailed introduction to the method of access control card reader wiring.
Metal Access Control is specifically designed for electric locks and safety systems. Thanks to the metal housing design, it has a more powerful identification and anti-interference characteristics. From the above figure, we can understand the wiring method of Metal Access Control, which is actually very simple. Below we introduce the performance of the Metal Access Control's wiring port in text form.
+12V: positive working power supply, input range is DC9-13.8V (rated at 12V best);
GND: the negative pole of the working power supply, which is also the common ground of the signal;
NC: relay normally closed point, current load capacity DC3A/30V;
COM: relay common point, current load capacity DC3A/30V;
NO: The relay is always open, the current load capacity is DC3A/30V;
PUSH: Exit button switch, low level unlock;
DOOR: door status switch, link door magnetic switch, low level means door closing;
ALM: alarm output port, low level when there is alarm, current load 100mA;
FIRE: access alarm signal (connected to GND trigger);
BELL: Connect the doorbell switch.
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