eSSL KR503M – 13.56MHz Mifare Card Reader for Modern Attendance Systems
The eSSL KR503M card reader is a compact, high‑performance 13.56MHz MIFARE reader designed for secure, contactless access control and attendance management. Featuring a fast read speed of ≤200ms, 5cm read range, and a rugged IP65 waterproof ABS housing, the KR503M is built for reliability in both indoor and outdoor environments. Its universal 34‑bit Wiegand output ensures seamless integration with any standard access control or attendance system panel, making it the ideal choice for offices, warehouses, parking gates, and industrial facilities.
📌 What is the eSSL KR503M?
The eSSL KR503M is a 13.56MHz MIFARE card reader designed for secure, contactless identification in access control and attendance systems. It reads the unique identifier (UID) from MIFARE Classic (1K/4K), MIFARE Ultralight, and other ISO14443A compliant cards and key fobs, then transmits the data to a connected panel via the industry‑standard 34‑bit Wiegand protocol. Housed in a rugged IP65‑rated ABS casing, the KR503M is dust‑tight and protected against powerful water jets, enabling reliable operation in outdoor and harsh environments. With a read range of up to 5 cm and a reading time of ≤200 ms, the KR503M delivers fast, accurate card reading for a seamless user experience.
📊 Technical Specifications – eSSL KR503M
| Product Model | eSSL KR503M (13.56MHz Mifare Reader) |
|---|---|
| Card Compatibility | 13.56MHz MIFARE (Classic 1K/4K, Ultralight, DESFire, ISO14443A compatible) |
| Read Range | Up to 5 cm (depends on card type and environmental conditions) |
| Reading Time | ≤200 ms |
| Output Format | 34‑bit Wiegand (default, configurable) | Communication Interface | Wiegand (34-bit) / RS485 (optional model KR503M-RS) |
| Power Supply / Current | DC 6-14 V / ≤ 70 mA (max) |
| Input Ports | 2ea (External LED Control, External Buzzer Control) |
| LED Indicators | 2‑color LED (Red/Green) for power, standby, and card read status |
| Beeper | Yes (audible feedback on card read) |
| Operating Temperature / Humidity | -20°C to +65°C / 10% – 90% RH (non‑condensing) |
| Ingress Protection (IP) Rating | IP65 (dust‑tight, protected against powerful water jets) |
| Dimensions (W × H × T) | 116 mm × 75 mm × 17.3 mm |
| Material | ABS+PC with texture |
Specifications derived from eSSL Security documentation, official product data, and independent technical listings. ⚠️Note: The current image may be generic; the final product may differ. Please contact us for the latest specification sheet.
🔑 Key Features – Why Choose the eSSL KR503M
✅ 13.56MHz MIFARE Smart Card Technology
Supports MIFARE Classic (1K/4K), MIFARE Ultralight, and ISO14443A cards. Offers enhanced security with sector‑based encryption and read/write capabilities for multi‑application use (access + canteen + time‑attendance).
Supports MIFARE Classic (1K/4K), MIFARE Ultralight, and ISO14443A cards. Offers enhanced security with sector‑based encryption and read/write capabilities for multi‑application use (access + canteen + time‑attendance).
✅ High‑Speed Reading (≤200ms)
Fast read speed of 200ms ensures a smooth, frictionless user experience, reducing wait times at entry points and improving overall system efficiency.
Fast read speed of 200ms ensures a smooth, frictionless user experience, reducing wait times at entry points and improving overall system efficiency.
✅ Standard 34‑bit Wiegand Output (Configurable)
Universally compatible with all eSSL access panels (C3‑100, C3‑200, C3‑400, InBio) and any third‑party controller that accepts Wiegand input. Enables plug‑and‑play integration into new or existing access control and attendance systems.
Universally compatible with all eSSL access panels (C3‑100, C3‑200, C3‑400, InBio) and any third‑party controller that accepts Wiegand input. Enables plug‑and‑play integration into new or existing access control and attendance systems.
✅ IP65 Waterproof & Rugged ABS Casing
Fully dust‑tight and protected against powerful water jets. Can be installed at outdoor parking gates, building perimeters, and industrial yards without risk of water or dust ingress damage.
Fully dust‑tight and protected against powerful water jets. Can be installed at outdoor parking gates, building perimeters, and industrial yards without risk of water or dust ingress damage.
✅ Wide Operating Temperature (-20°C to +65°C)
Engineered to function reliably in extreme cold or intense summer heat – ideal for outdoor installations in demanding climates.
Engineered to function reliably in extreme cold or intense summer heat – ideal for outdoor installations in demanding climates.
✅ Low Power Consumption & Dual LED Feedback
Standby current of less than 70 mA reduces energy costs. The 2‑color LED (Red/Green) and built‑in beeper provide immediate visual and audible feedback to users, confirming card reads and access status.
Standby current of less than 70 mA reduces energy costs. The 2‑color LED (Red/Green) and built‑in beeper provide immediate visual and audible feedback to users, confirming card reads and access status.
✅ External LED & Buzzer Control Ports
Two dedicated input ports allow system integrators to connect external indicator lights or buzzers, tailoring feedback to suit site‑specific requirements.
Two dedicated input ports allow system integrators to connect external indicator lights or buzzers, tailoring feedback to suit site‑specific requirements.
✅ Reverse Polarity & Short‑Circuit Protection
Solid epoxy‑potted electronics and built‑in protection ensure long‑term reliability and immunity to wiring errors during installation.
Solid epoxy‑potted electronics and built‑in protection ensure long‑term reliability and immunity to wiring errors during installation.
⏱️ Integrated Attendance System – How the KR503M Completes Your Workforce Management
🔹 Real‑Time Card Log Capture
When connected to an eSSL access controller (C3‑100, C3‑200, C3‑400), the KR503M records every card swipe with a timestamp. These logs feed directly into eTimeTrackLite software or any Wiegand‑compatible attendance system, automating daily attendance tracking and eliminating manual registers.
When connected to an eSSL access controller (C3‑100, C3‑200, C3‑400), the KR503M records every card swipe with a timestamp. These logs feed directly into eTimeTrackLite software or any Wiegand‑compatible attendance system, automating daily attendance tracking and eliminating manual registers.
🔹 Multi‑Shift & Attendance Policy Support
Pair the reader with eSSL’s eTimeTrackLite to configure multiple shifts, leave policies, overtime rules, and holiday calendars. The system automatically applies these rules to captured card events, producing accurate attendance summaries.
Pair the reader with eSSL’s eTimeTrackLite to configure multiple shifts, leave policies, overtime rules, and holiday calendars. The system automatically applies these rules to captured card events, producing accurate attendance summaries.
🔹 Seamless Payroll & ERP Integration
Attendance data can be exported to CSV/Excel or pushed via API to leading ERP, HRMS, and payroll platforms, including Spine, GreytHR, HROne, Zoho CRM, Candle, Saral, and Oracle. No manual data entry – attendance automatically syncs with payroll processing.
Attendance data can be exported to CSV/Excel or pushed via API to leading ERP, HRMS, and payroll platforms, including Spine, GreytHR, HROne, Zoho CRM, Candle, Saral, and Oracle. No manual data entry – attendance automatically syncs with payroll processing.
🔹 Flexible Credential Management
Administrators can easily issue, suspend, or revoke MIFARE cards directly from the eSSL access panel or eTimeTrackLite software. The reader immediately recognises updated permissions, supporting visitor access, temporary contractors, or changing employee roles.
Administrators can easily issue, suspend, or revoke MIFARE cards directly from the eSSL access panel or eTimeTrackLite software. The reader immediately recognises updated permissions, supporting visitor access, temporary contractors, or changing employee roles.
🏢 Where to Deploy the eSSL KR503M Card Reader
🏢 Corporate Offices & Server Rooms
Secure employee doors, server rooms, and administrative offices. The compact flush‑mount design fits seamlessly on door frames and turnstiles.
Secure employee doors, server rooms, and administrative offices. The compact flush‑mount design fits seamlessly on door frames and turnstiles.
🏘️ Gated Residential Communities & Apartments
Install at main pedestrian gates or lift lobbies; residents can use MIFARE cards or key fobs for access. The IP65 rating ensures reliable outdoor operation.
Install at main pedestrian gates or lift lobbies; residents can use MIFARE cards or key fobs for access. The IP65 rating ensures reliable outdoor operation.
🚗 Parking Gates & Vehicle Barriers
Pair with boom barriers or sliding gates. The KR503M‘s waterproof housing and wide operating temperature guarantee consistent performance at outdoor parking entrances.
Pair with boom barriers or sliding gates. The KR503M‘s waterproof housing and wide operating temperature guarantee consistent performance at outdoor parking entrances.
🏭 Industrial & Manufacturing Facilities
Factory entry points, warehouse doors, and tool cribs benefit from the rugged IP65 construction and fast Wiegand output.
Factory entry points, warehouse doors, and tool cribs benefit from the rugged IP65 construction and fast Wiegand output.
🏫 Educational Institutions & Libraries
Secure laboratory doors, library entry points, and faculty offices with economical, low‑maintenance MIFARE card readers.
Secure laboratory doors, library entry points, and faculty offices with economical, low‑maintenance MIFARE card readers.
🏥 Healthcare & Pharmaceutical Facilities
Pharmacy doors, medical record rooms, and restricted staff zones gain reliable outdoor‑rated access control with easy integration into existing security ecosystems.
Pharmacy doors, medical record rooms, and restricted staff zones gain reliable outdoor‑rated access control with easy integration into existing security ecosystems.
🌟 Why Choose eSSL for Your Card Reader Needs?
Trusted Security Expertise
eSSL has a strong legacy of RFID and biometric security. The KR503M is built on the same reliable platform used in thousands of access control and attendance installations worldwide.
eSSL has a strong legacy of RFID and biometric security. The KR503M is built on the same reliable platform used in thousands of access control and attendance installations worldwide.
Universal Wiegand Compatibility
The KR503M‘s 34‑bit Wiegand output ensures seamless integration with any eSSL or third‑party access panel, biometric terminal, or door controller – whether you are upgrading an existing system or designing a new one.
The KR503M‘s 34‑bit Wiegand output ensures seamless integration with any eSSL or third‑party access panel, biometric terminal, or door controller – whether you are upgrading an existing system or designing a new one.
Rugged IP65 Design for Any Environment
With solid epoxy potting and IP65‑rated housing, the KR503M reliably operates outdoors, in dusty manufacturing zones, and in high‑humidity areas where other readers would fail.
With solid epoxy potting and IP65‑rated housing, the KR503M reliably operates outdoors, in dusty manufacturing zones, and in high‑humidity areas where other readers would fail.
Cost‑Effective & Low Maintenance
Low power consumption (≤ 70 mA) and durable components reduce long‑term operating costs. Optional annual maintenance contracts (AMC) provide ongoing support and peace of mind.
Low power consumption (≤ 70 mA) and durable components reduce long‑term operating costs. Optional annual maintenance contracts (AMC) provide ongoing support and peace of mind.
❓ Frequently Asked Questions – eSSL KR503M
What type of cards does the eSSL KR503M support?
The KR503M supports 13.56MHz MIFARE cards (ISO14443A), including MIFARE Classic (1K/4K), MIFARE Ultralight, and other MIFARE-compatible credentials (cards, key fobs, wristbands).
What is the read range of the eSSL KR503M reader?
The KR503M offers a read range of up to 5 cm (approximately 2 inches). This provides reliable card recognition for standard access control and attendance applications.
Is the eSSL KR503M suitable for outdoor installation?
Yes. The KR503M features an IP65 waterproof and dust‑tight ABS casing, making it suitable for both indoor and outdoor installations, including parking gates, building perimeters, and industrial yards.
What output interface does the eSSL KR503M provide?
The KR503M supports standard 34‑bit Wiegand output (configurable), ensuring compatibility with virtually any access control panel, biometric terminal, or attendance system that accepts Wiegand input.
What is the difference between eSSL KR503M and KR503E?
The KR503E is a 125kHz EM proximity card reader (read‑only, lower cost). The KR503M is a 13.56MHz MIFARE reader offering higher security encryption, read/write capabilities for multi‑application use, and a shorter read range of 5cm (compared to 10cm for the KR503E). Both share the same IP65 housing, Wiegand output, and compact form factor.
Can the KR503M be used as part of a complete attendance system?
Absolutely. When connected to an eSSL access controller (e.g., C3‑100, C3‑200) and paired with eTimeTrackLite software, the KR503M captures card events that can be logged for employee attendance, access records, and payroll integration. It also works with third‑party attendance systems that accept Wiegand input.