EM4100RD is a 125KHZ contactless RF ID card dedicated module, with high receiving sensitivity, small working current, single DC power supply, low price and high performance, suitable for access control, attendance, charging, anti-theft, patrol and other various radio frequency identification applications
The EM4100RD is a 125 kHz non‑contact RFID receive module that reads 64‑bit read‑only EM4100‑compatible IDs using Manchester encoding. It offers high reception sensitivity, low power consumption, and a compact size suitable for access control, attendance, and security applications.
The document describes the module’s pinout, electrical characteristics, mechanical dimensions, and Wiegand 26‑bit data format. It also lists typical operating conditions such as supply voltage, current draw, read distance, and temperature ranges. This manual is written in Chinese.
| Supply voltage (Vcc) | 3.3 V min / 5 V typ / 6 V max |
|---|---|
| Operating frequency | 110 kHz min / 125 kHz typ / 140 kHz max |
| Operating temperature | 0 °C to 70 °C |
| Storage temperature | -35 °C to +125 °C |
| Read distance | 10 cm – 15 cm |
| Read time | ≤ 100 ms |
| Power supply (pin 6) | +5 V |
| Wiegand output format | 26‑bit (Wiegand 26bits) |
It supports the EM4100‑compatible 64‑bit read‑only ID format with Manchester encoding.
The module operates at 125 kHz, with a range from 110 kHz to 140 kHz.