The ZKTeco KR503E (ID RS) is a professional 125kHz EM RFID proximity card reader with an RS485 communication interface, designed for secure and scalable access control systems. Using RS485 communication, multiple readers can be connected to a single controller, making it an excellent choice for medium and large access control installations.

Built with a durable ABS + PC housing and an IP65-rated weather-resistant design, the KR503E is suitable for both indoor and outdoor environments. It offers a card reading distance of up to 10 cm, ≤200 ms recognition speed, dual-color LED indicators, and a built-in buzzer for user feedback. The reader is fully compatible with ZKTeco InBio160, InBio260, InBio460, C3-200, and C3-400 access control panels, making it ideal for offices, factories, schools, commercial buildings, and residential facilities.

Key Features

• Supports 125kHz EM (ID) RFID proximity cards.
• RS485 communication for reliable long-distance data transmission.
• Card reading distance of up to 10 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.
• Ideal for offices, factories, schools, commercial buildings, and residential access control systems.