Product Overview

This 125kHz LF RFID card reader module delivers reliable proximity card reading for access control systems, attendance tracking, anti-theft systems, warehousing management, and metro applications. Designed for seamless integration with Wiegand 26/34 interfaces, the module reads EM4100 and TK4100 compatible cards within a range of 0 to 100 millimeters depending on card type and environmental conditions. System integrators, security contractors, and access control distributors choose this module for its stable read performance, compact form factor at 51mm by 37mm, and compatibility with existing Wiegand-based controllers. The module operates at DC 12V with a working current of 100mA, making it suitable for building access panels, standalone door controllers, and multi-door networked systems. For wholesalers deploying large-scale access control projects, the module provides consistent batch performance, simple wiring with six color-coded leads, and reliable operation across temperatures from -10°C to +70°C. The double-color LED indicator with red standby and green read-success feedback, combined with an audible buzzer, simplifies installation validation and end-user daily operation.

Key Features

• 125kHz operating frequency for EM4100 and TK4100 compatible proximity cards
• Wiegand 26/34 interface with selectable output format via purple line connection to black line
• Read range 0 to 100 millimeters dependent on card type and installation environment
• Compact size 51mm by 37mm by 1mm for integration into access panels and enclosures
• DC 12V operation with 100mA typical working current
• Dual-color LED red standby indication and green read-success indication
• Integrated buzzer for audible read confirmation during card presentation
• 180mm ±5mm lead length for flexible wiring inside controller enclosures
• Wiegand transmission distance greater than or equal to 100 meters for remote controller placement
• Storage temperature -20°C to +80°C with operating humidity 0 to 95 percent relative

Technical Specifications

Wiring Definition

• Black GND
• Red VCC 12V DC
• Purple Wiegand 26 or Wiegand 34 selectable output format is WG34 when purple line connects with black line
• Grey Green light and buzzer long ring
• White Wiegand D1 data line
• Green Wiegand D0 data line

Industrial Applications

Security system integrators and access control contractors deploy this module in building entrance control panels, office door controllers, parking area gates, warehouse entry points, and staff attendance terminals. The Wiegand 26/34 interface ensures direct compatibility with most commercial access control controllers, eliminating the need for additional protocol conversion hardware. For attendance system manufacturers, the module provides a compact read head that integrates inside custom enclosures or retrofits into existing panel designs. Anti-theft system designers value the stable 125kHz read performance for asset protection zones where proximity card identification must be consistent. Warehousing and logistics operators working with project contractors choose this module for inventory room access logging and personnel movement tracking across multiple facility zones. Metro and transit system integrators require the module for fare gate card reading positions where simple, reliable Wiegand output supports backend validation systems. The module eliminates the business problem of card reader incompatibility with legacy controllers while providing a future-proof interface for new system installations.

OEM and ODM Manufacturing Support

As a dedicated do rfid reader manufacturer, we support OEM and ODM customization for this 125kHz reader module. Procurement teams working on large-scale access control deployments routinely require custom cable lengths, connector types, LED color configurations, buzzer tone patterns, or enclosure mounting brackets. Our factory accommodates these modifications within standard production runs, maintaining batch consistency across thousands of units. For system integrators developing proprietary access control panels, we provide OEM branding on the module PCB and label areas, along with custom firmware adjustments for specific timing parameters or output formats if required. Distributors supplying commercial security products benefit from ODM services where we develop variants optimized for different regional markets, such as modified temperature ranges or specific card compatibility profiles. Our engineering team reviews each customization request against production feasibility and delivers samples within agreed timelines before bulk manufacturing begins. Long-term OEM partners receive priority production allocation and technical documentation support for certification processes in their target markets.

Factory Production Advantages

Our manufacturing facility has operated for over two decades producing RFID readers and access control components for global distribution. This production experience translates into stable process control for the DO-MU125 module, where each unit undergoes functional testing including read range verification, Wiegand signal integrity checking, LED and buzzer operation validation, and power consumption measurement. For wholesalers and bulk buyers, factory capacity supports order volumes from several hundred to tens of thousands of modules per month with consistent lead times. Raw material sourcing follows established supply chain relationships for RFID reader ICs, PCB substrates, connectors, and passive components, reducing procurement risk for long-term supply contracts. Incoming component inspection, in-process quality checks, and final outgoing testing form a three-stage quality control system that catches defects before shipment. Export experience across multiple international markets means our documentation, packaging, and labeling comply with common customs requirements, reducing clearance delays. For project deployment scenarios where module availability determines installation timelines, our production planning team works with customers to align manufacturing schedules with project milestones. Batch-to-batch consistency ensures that modules purchased for expansion of existing systems perform identically to initial installation units delivered months or years earlier.

Bulk Supply and Project Deployment Support

Building security distributors and access control wholesalers require reliable bulk supply for ongoing projects and inventory replenishment. The DO-MU125 module supports this need through stable production capacity and flexible packaging options. One piece per box with 100 pieces per carton is standard, but packaging can be adjusted for specific warehouse handling requirements or drop-ship fulfillment models. For large-scale deployments involving hundreds or thousands of doors across multiple building sites, our factory coordinates production schedules to ensure all modules ship within a narrow delivery window, enabling site-wide installation without partial shipments. System integrators managing phased rollouts benefit from the ability to order incremental quantities that match each project phase while maintaining identical module revision levels. Compatibility with Wiegand controllers from multiple manufacturers means distributors can stock a single module SKU that serves projects using different controller brands, reducing inventory complexity. The 100-meter Wiegand transmission distance allows controllers to be located in centralized equipment rooms while readers are positioned at distant door entries, simplifying cabling infrastructure and reducing per-door installation cost. For OEM customers embedding this module into larger products, we support scheduled releases against blanket purchase orders, providing supply chain stability for their production planning.

Quality Warranty

Warranty service applies when damage is not caused by human factors. DO RFID Reader provides a two-year warranty for this module under normal operating conditions. If repair is required due to causes not covered under warranty, additional charges apply. For detailed warranty terms and support procedures, please contact our service team.

Frequently Asked Questions

Q: How can I place an order for this RFID reader module?
A: Send your requirements including quantity, packaging preference, and any customization needs to our sales team. We will confirm pricing and lead time before production begins.

Q: What payment terms are available for bulk orders?
A: Trade Assurance, T/T bank transfer, PayPal, and Western Union are accepted. Payment terms for ongoing wholesale accounts can be discussed based on order history and volume.

Q: Can I receive a sample to evaluate before committing to bulk purchase?
A: Free samples are available for qualified buyers. You cover the freight cost. Standard sample quantities are 1 to 5 units for technical evaluation.

Q: What is the typical lead time for sample and bulk orders?
A: Sample orders typically ship within 3 to 7 days after order confirmation. Bulk orders of up to 5000 units generally ship within 7 to 15 days. Quantities above 100000 units require 15 to 30 days depending on current production load.

Q: Can the module be customized for my specific project requirements?
A: Yes. Customization options include cable length, connector type, LED color, buzzer configuration, OEM branding, and packaging format. Submit your specification sheet for review by our engineering team.

Q: What shipping methods are available for international delivery?
A: We ship via DHL, FedEx, TNT, UPS, and EMS for express delivery. Air freight and sea freight are available for larger volumes. You may also use your own forwarding agent. Trade terms include EXW, FOB, FCT, CIF, and CFR.

Q: What export documentation can you provide for customs clearance?
A: We can supply Certificate of Origin, FTA certificate, Form F, Form E, and other required documentation depending on destination country requirements and trade agreements.

Q: How does the module select between Wiegand 26 and Wiegand 34 output?
A: The purple wire is used for format selection. When the purple wire connects to the black ground wire, the output format is Wiegand 34. When left unconnected, the default format is Wiegand 26.

Q: Is this module compatible with my existing access control controller?
A: The module outputs standard Wiegand 26 or Wiegand 34 signals, which are compatible with the majority of commercial access control controllers on the market. Verify that your controller accepts Wiegand input before ordering.

Q: What card types are supported by this reader module?
A: The module reads EM4100 and TK4100 compatible 125kHz passive proximity cards. Cards not operating at 125kHz or not using EM-compatible modulation will not be read.

For technical specifications, pricing, OEM customization support, or project cooperation inquiries, contact us at info@dorfidreader.com. Our team provides detailed product information, application guidance, and bulk supply options for system integrators, distributors, and industrial buyers worldwide.