# RFID Reader Promag PCR-300 125 kHz EM4102 with RS232 emulation

**URL:** https://aio.lv/en/product--promag-pcr-300fu--1718066
**Data updated:** 2026-02-12 09:44 (EET)
**Category:** Handheld Terminals
**Manufacturer:** Promag
**Manufacturer code:** PCR-300FU
**Warranty:** 2 Years
**Availability:** Out of stock

## Summary description

Compact RFID reader Promag PCR-300 operates at 125 kHz and supports EM4102 tag format. The unit provides RS232 emulation for easy integration with legacy controllers and systems. Intended for access control, attendance or identification tasks, it reads 125 kHz proximity tags and outputs data via serial-emulated interface for straightforward installation and reliable identification.

## Long description

Promag PCR-300 is a compact 125 kHz RFID reader designed to read EM4102 proximity tags and provide data output via RS232 emulation. The reader is intended for straightforward integration with legacy controllers, access control panels and serial-based systems where a simple serial data stream representing tag IDs is required. Its small footprint and standard interface simplify installation in access points, turnstiles, and attendance terminals.
Advantages
The Promag PCR-300 supports the widespread EM4102 tag format operating at 125 kHz, ensuring compatibility with many passive proximity cards and fobs. RS232 emulation facilitates connection to older controllers and devices that accept serial input without specialized drivers. The compact housing and fixed read range offer reliable tag detection in close-range identification tasks while keeping installation and wiring straightforward.
Suitable for
 Access control readers for doors and gates
 Time and attendance terminals
 Identification of personnel and assets with 125 kHz tags
 Integration with legacy systems requiring serial input
Key specifications
 Operating frequency: 125 kHz
 Supported tag format: EM4102 (125 kHz proximity)
 Interface: RS232 emulation (serial data output)
 Form factor: compact reader housing for flush or surface mounting
 Power supply: low-voltage DC operation (refer to manufacturer documentation for exact values)
 Typical use range: short-range proximity reading suitable for access and identification
How to use
Install the Promag PCR-300 at the desired entry point following standard mounting practices and wiring for a serial-enabled controller. Connect power and the serial data lines according to the controller’s RS232 input configuration; the reader will emulate a serial device and output tag IDs when an EM4102 tag is presented. Configure the receiving system to parse the serial stream and map the tag identifiers to user records or access rules. Place tags within the reader’s effective range to ensure reliable reads.
Usage recommendations
For reliable operation, mount the reader away from large metal surfaces and high-frequency interference sources. Verify the controller’s RS232 settings (baud rate, parity, stop bits) to match the reader’s emulation parameters and test reads with known EM4102 tags before final commissioning. Use compatible 125 kHz proximity cards or key fobs to ensure correct identification.

## FAQ

### What payment options are available?

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### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Promag products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Promag service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

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