Expert answer:
Hello, thank you for purchasing our company's access controller, you can refer to the following picture to connect:
Wiring port performance:
![2.jpg](/upload/ueditor/uploadimages/87301618372460.jpg)
1. +12V: Positive working power supply, input range: DC9-13.8V.
2. GND: The negative pole of the working power supply, which is also the common ground for signals.
3. NO: Normally open point of the relay, current load capacity DC3A/30V.
4. COM: common point of relay, current load capacity is DC3A/30V.
5. NC: normally closed point of the relay, current load capacity DC3A/30V.
6. OPEN: Exit button switch, low level switch.
7. DOOR: Door status switch, connected to the door magnetic switch, low level means the door is closed.
8. ALM: Alarm output port, low level when there is an alarm, current load 100mA.
9. BELL: Connect the doorbell switch.
If you still don’t understand, you can ask us at any time and we will answer you in time.