To wire your STid reader correctly, it’s essential to refer to the specific installation manual for your reader model, as wiring configurations can vary.
Below are general guidelines for wiring different types of STid readers:
1. Power Supply Connection:
Connect the 0V (Ground) and +12V (Power) terminals to a suitable power source.
Ensure the power supply meets the voltage and current specifications of your reader model.
2. Data Communication Lines:
Depending on your reader’s interface (e.g., Wiegand, RS232, RS485), connect the corresponding data lines to your host system. For RS485 connections, use twisted pair cables for L+ and L- lines, and consider terminating the bus with 120Ω resistors at both ends to prevent signal reflections.
3. Additional Connections:
Some readers may have additional connections such as LED control, Buzzer, or Tamper Switch. Connect these as required by your application.
4. Cable Recommendations:
Use multi-pair shielded cables with a diameter between 5mm and 8mm to ensure water resistance and reduce electromagnetic interference.
The maximum cable length depends on the communication interface:
- RS232: Up to 15 meters.
- RS485: Up to 1000 meters.
- Wiegand/Clock-and-Data: Up to 100 meters.