Advanced Access Control Platform

The EP4502 provides a two-door interface with auxiliary I/O, including onboard I/O for 2 readers, 8 supervised inputs, and 4 relay outputs. In addition to centralized biometric template management, the controller supports a wide range of reader communication connections, including Wiegand, clock and data, RS-485, OSDP and OSDP Secure Channel as well as all combinations of ID technologies such as magnetic stripe, proximity, smart cards, keypads, and LCD terminals.


The FN-C4502 intelligent controller is Mercury Security’s next generation advanced access control platform. It has direct hardware support for 2 openings and can scale to 64 access points. Built on proven Authentic Mercury hardware, this high performance controller enables Mercury Technology Partners to add complimentary third-party software applications onboard. In addition, the FN-C4502 supports a variety of extended features including High Assurance Credential Authentication and it complies with the BACnet standard for partners to add a smart link to building automation and control systems.

The controller’s enhanced onboard memory is designed to support multiple system applications and increased card populations with its storage capacity of up to 2,000,000 user records and an event buffer of 50,000 transactions. The flexible FN-C4502 utilizes the Linux operating system for extensive communications support and heightened IT security capabilities. It is also capable of managing access and alarms, and interfacing with an array of Mercury hardware devices — all while providing the required decision-making oversight.

For partners seeking a comprehensive and open access control platform, increased user capacity, and a reliable hardware platform to host/expand their applications, the FN-C4502 is the clear solution. It delivers a complete security and access control solution as well as innovative application extensions, interoperability and data security.


Multi-Facility Code Support
Multi-Reader Technology Support
Fault-tolerant communications capability
UL 294 Recognized
BACnet for streamlined building automation and control


Scaleable to 64 doors/openings, flexible for increased device and system support
Native IPv4 and IPv6 connectivity
Supports OpenSSL library and SSL/TLS protocols for communications security
Decentralizes system intelligence; functions independently of the host once configured.

Technical Data

PRIMARY POWER: 12-24 Vdc +/- 10%, 500mA maximum

INPUTS: 8 general purpose: programmable circuit type. 2 dedicated: tamper and power monitor

OUTPUTS: 4 relays: Form C, 5A 30Vdc.

READER PORTS: 2 reader ports. Unregulated pass through or regulated 12Vdc (180mA max. per reader port). Clock/Data, Wiegand, or RS-485.

SERIAL PORTS: Primary 10/100 Ethernet, Port 1: RS-485, 2-wire. Port 2: RS-485, 2-wire.

DIMENSIONS: 6.0″ x 8.0″ x1.0″ (152mm x 203mm x 25mm)

TEMPERATURE: 0-50°C operational, -55-85°C storage


CONNECTIVITY: Primary Port: 10/100 Ethernet, IP Client, TLS Encrypted.

ACCESS CONTROL: 2 000 000 Cardholders, 50 000 Transaction buffer. 255 Access Levels. Activation/Deactivation dates. 19 digit (64-bit) UserId and 15 digit PIN numbers maximum. Activation/Deactivation Dates. If/Then Macro capability, Anti-passback support. Nested area, hard, soft, or timed forgiveness.

CARD FORMATS: 8 active card formats per FN-C4502. PIV-II, CAC, TWIC card compatible.

ALARM MANAGEMENT: Normally open/Normally closed, unsupervised, supervised. Standard or custom end-of-line resistances.

STANDARDS: UL294 Recognized, CE Compliant, ROHS, FCC Part 15 Class A, NIST Certified Encryption

This information is subject to change without notice