T7122M-I industrial card reader module is an improvement on the T7122M card reader module, ensuring normal operation in low temperature conditions and reducing the impact of temperature on the reading distance.
This document describes the T7122M-I industrial RFID card reader module, which maintains full compatibility with the T7122M interface while improving the RF generation and carrier detection circuits for reliable operation down to -40 °C. It explains the module’s performance characteristics, such as a typical reading distance of 5‑12 cm and low power consumption.
The manual includes detailed interface pin descriptions, electrical parameters, data output formats, application circuit diagrams, and precautions for installation and operation, including guidance on compensating coil inductance with external capacitors and connecting the module to a PC serial port via a MAX232 level shifter. This manual is written in Chinese.
| Working frequency | 125 kHz |
|---|---|
| Maximum reading distance | 5‑12 cm |
| Supply voltage | +5 V (max 5.5 V) |
| Operating current | 70‑90 mA |
| Maximum output current (So, Sck, CP) | ±25 mA |
| Operating temperature range | -40 °C to +70 °C |
| Dimensions (L×W×H) | 57 mm × 22 mm × 11 mm |
The module can read cards at a distance of 5 to 12 cm.
It operates from a +5 V supply, with a maximum allowed voltage of 5.5 V.
Use a MAX232 level‑shifter, set the serial port to 9600 bps, no parity, 8 data bits, 1 stop bit.
Low‑loss, low‑temperature‑drift capacitors are recommended, and the manufacturer provides them free of charge.