JP-7941W Dual‑band RFID Read Module Wiegand TTL UART for Access Control System

Product Specification

JP-7941W Card Reader Module

Product Overview

     The JP-7941W Card Reader Module is a versatile 13.56MHz RFID/NFC reader module supporting ISO/IEC 14443 Type-A (NTAG, MF1xxS20, S50, S70, etc.) and 125kHz EM4100 and T5577 cards, providing broad compatibility across both high‑frequency and low‑frequency card types. Engineered for reliable performance, the module delivers reading distances of 4–5cm for IC cards and 6–7cm for ID cards, making it suitable for a variety of access control, identity verification, and time attendance applications. The module offers flexible interface options — UART (TTL) and Wiegand — enabling seamless integration with both embedded systems and legacy access control panels. Housed in a compact 47mm × 26mm × 5mm enclosure and rated for -25°C to 85°C operation, the JP‑7941W is ideal for OEMs and system integrators requiring a cost‑effective, multi‑card reader module for indoor and outdoor installations.

Key Advantages

• Multi‑Frequency Card Support: Reads both 13.56MHz (ISO14443 Type‑A, NTAG, etc.) and 125kHz (EM4100, T5577) cards — a single module handles mixed‑card environments, reducing hardware complexity and simplifying system design.

• Extended Read Range: Achieves 6–7cm for ID cards and 4–5cm for IC cards — outperforming many compact readers and providing more user‑friendly operation without precise card placement.

• Wide Operating Temperature Range: -25°C to 85°C operation — suitable for outdoor access control, industrial environments, and extreme‑climate deployments where consumer‑grade readers would fail.

• Dual Interface Options: Supports UART (TTL) and Wiegand interfaces — enabling direct integration with both modern embedded microcontrollers and legacy Wiegand‑based access control panels.

• Ultra‑Compact Form Factor: Measures just 47mm × 26mm × 5mm — fits easily into slim readers, keypads, and space‑constrained devices without compromising read performance.

• Low Power Consumption: Draws just 50mA typical current — ideal for power‑sensitive installations, battery‑backed systems, and large‑scale deployments where multiple readers share a single power supply.

Why Choose This Module?

• True Multi‑Frequency Support — One Module, Multiple Card Types: Many access control environments have mixed card populations — new smart cards and older EM4100 proximity cards still in use, with T5577 rewritable cards added over time. The JP‑7941W reads them all without requiring multiple readers or separate antennas. This simplifies installation, reduces hardware costs, and enables a unified user experience across different card types.

• Extended Read Range for Better User Experience: With 6–7cm read range for ID cards and 4–5cm for IC cards, the JP‑7941W provides more forgiving positioning than standard 3–4cm readers. Users don't need to precisely align their cards — simply tap or wave, reducing failed attempts, speeding up entry, and improving throughput at busy access points.

• Built for Extreme Environments: The -25°C to 85°C operating range ensures reliable performance in outdoor access control in freezing climates, hot industrial facilities, and installations without climate control — where standard 0°C to 50°C modules would stop working or fail prematurely.

• Flexible Integration Across Platforms: The combination of UART (TTL) for embedded designs and Wiegand for legacy access control panels provides universal connectivity. Existing Wiegand‑based controllers connect directly — no protocol conversion, no additional hardware. For new designs, UART offers simpler microcontroller integration, allowing the JP‑7941W to serve across product generations and platform types.

• Ultra‑Compact, Industrial‑Ready Package: At 47mm × 26mm × 5mm, the JP‑7941W is designed for the tightest enclosures — slim profile readers, flush‑mount keypads, and space‑constrained access terminals. The compact footprint enables modern, aesthetically pleasing product designs without forcing engineers to compromise on read performance, temperature tolerance, or card compatibility.