The ZKTeco KR503M-RS is a professional 13.56MHz MIFARE RFID card reader with an RS485 communication interface, designed for secure and scalable access control systems. It supports MIFARE (IC) cards and communicates with compatible ZKTeco controllers over RS485, allowing multiple readers to be connected to a single controller for efficient and reliable access management.

Built with a durable ABS + PC housing and an IP65-rated weatherproof design, the KR503M-RS is suitable for both indoor and outdoor installations. It provides a card reading distance of up to 5 cm, ≤200 ms reading speed, dual-color LED indicators, and a built-in buzzer for user feedback. Compatible with ZKTeco InBio160, InBio260, InBio460, C3-200, and C3-400 access control panels, it is ideal for offices, factories, schools, commercial buildings, and residential facilities.

Key Features

• Supports 13.56MHz MIFARE (IC) RFID cards.
• RS485 communication for reliable long-distance data transmission.
• Card reading distance of up to 5 cm.
• Fast card reading speed of ≤200 ms.
• Durable ABS + PC housing.
• IP65-rated weatherproof design for indoor and outdoor use.
• Dual-color red and green LED status indicators.
• Built-in buzzer for audible operation feedback.
• Compatible with ZKTeco InBio160, InBio260, InBio460, C3-200, and C3-400 controllers.
• Supports external LED and buzzer control for enhanced system integration