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UW-R4GB is wall mount RFID proximity card and transponders reader from the MIFARE® Classic, Plus, Ultralight C, DESFireiCLASS (CSN only), ICODE® SLI (ISO 15693) families, operating at 125kHz frequency, equipped with an RS485 and WIEGAND interfaces. Reader has also built-in antenna, buzzer, relay, two LED indicatiors and RTC clock with battery backup and comunicate over interface via OSDP (the latest standard with data transmission encryption, described in more detail in the article), Modbus RTU or Netronix transmission protocols.

The reader has the following functionalities:

  • built-in antenna, relay and buzzer,
  • built-in front panel button and LED indicator,
  • built-in reset button,
  • built-in tamper with spring,
  • built-in RTC clock with battery backup,
  • RS485 and WIEGAND interfaces,
  • anti-collision pin synchronizing readers working close together,
  • configuring dual state inputs and outputs,
  • configuring the behavior of the buzzer, relay, and LEDs,
  • control of dual state outputs,
  • reading dual state inputs,
  • password protected data,
  • OSDP, Modbus RTU and Netronix protocol support,
  • card memory with built-in lock driver.

OSDP support

Open Supervised Device Protocol (OSDP) is an access control application communication standard developed by the Security Industry Association (SIA) to improve the interoperability of access control products and their security.

SIA encourages the widespread adoption of this standard, which is already widely used by many leading manufacturers of access control devices. OSDP is recommended to be implemented for any access control installations that require a high degree of security and / or will be used in government facilities. The OSDP standard is especially valuable for government applications as it meets federal access control requirements such as PKI for FICAM.

Operating frequency 13,56MHz
Supported standards ICODE® SLI
MIFARE® Classic
MIFARE® Ultralight C
iCLASS (CSN only)
Interface RS485
Protocol Modbus RTU
Read range up to 8cm*
Supply voltage 8 - 16V
Max. current consumption 200mA
Antenna Yes
Buzzer Yes
Relay Yes
Size (mm) 82 x 82 x 22
Type RFID reader


  • Dodana obsługa interfejsu WIEGAND (AKP170123)


Botland B. Derkacz Sp. j.

Gola 25A
63-640 Bralin
  • 62 593 10 54
Gamma Sp. z o.o.

Gamma Sp. z o.o.

Kacza 6A
01-013 Warszawa
  • 22 862 75 00
Transfer Multisort Elektronik Sp. z o.o.

Transfer Multisort Elektronik Sp. z o.o.

Ustronna 41
93-350 Łódź
  • 42 645 55 55
SOS electronic s.r.o.

SOS electronic s.r.o.

Pri prachárni 16
040 11 Košice

Ask for support

We are at your service for any questions related to our products.

Looking for customized version of this product?

Apart from the offer of universal RFID readers and modules available permanently in the offer Netronix provides RFID design services for individual customer requirements. This enables creation of RFID device to be tailored to the specific RFID application.

If you have any questions about design of RFID devices please contact us by e-mail at

Are you looking for custom RFID products?

In addition to the offer of universal modules and RFID readers, which are permanently available in the offer
Netronix provides services of designing RFID devices for individual orders.

Thanks to this, it is possible to closely match the designed RFID device to the specificity of the target application.