1. Introduction
The MERCURY SECURITY MR52-S3B is a Serial Input/Output (SIO) module designed to expand HID Mercury intelligent controllers. This interface board facilitates the connection of dual card readers, providing a robust and secure solution for access control systems. It features an enhanced processor, increased memory, and a secure crypto engine for data encryption, ensuring a high level of security and flexibility within a distributed architecture.
2. Safety Information
Please read and understand all safety instructions before installing or operating the MR52-S3B controller. Failure to follow these instructions may result in damage to the device, injury, or improper operation.
- Electrical Safety: Ensure power is disconnected before making any electrical connections to prevent electric shock.
- Proper Handling: Handle the board by its edges to avoid damaging components or introducing static discharge.
- Environment: Install the device in a clean, dry environment, free from extreme temperatures, humidity, and corrosive substances.
- Correct Connections: Incorrect connection may result in damage to the unit. Always verify wiring diagrams before applying power.
- Qualified Personnel: Installation and servicing should only be performed by qualified personnel.
3. Product Overview
The MR52-S3B is designed for robust performance and security in access control applications. Key features include:
- AES 128/256 bit data encryption for secure communication.
- HSPD-12/FIPS-201 compliant for government and high-security applications.
- UL 294 recognized, CE compliant, FCC, and RoHS certified.
- Supports various reader technologies: OSDP, OSDP Secure Channel, FICAM government profiles, keypads, biometric readers, Wiegand, clock and data, magnetic stripe, F/2F, and supervised F/2F.
- RS-485 host connectivity for communication with intelligent controllers.
3.1. Board Layout
Below is an image of the MR52-S3B board with key components identified.
Figure 1: MR52-S3B Controller Board. This image displays the full circuit board, highlighting various connection points and integrated circuits.
Key areas of the board include:
- Reader 1 & 2 Connections (Top Left): Terminal blocks for connecting two card readers, including Data Out (DO) and Data In (DI) lines.
- Relay Outputs (Top Right): Six relay outputs (RLY 1-6) for controlling external devices.
- Input Terminals (Bottom Left): Eight input terminals (IN1-IN8) with corresponding TB1-TB8 connections, along with Tamper (TMP), Ground (GND), and Power Fail (PFL) inputs.
- RS-485 Interface (Bottom Right): Terminal block for RS-485 communication, including TR+, TR-, NC, GND, VIN, and VOUT.
- Power Input (Mid-Right): Connections for 12V PT, 5V, and 3.3V power supplies.
- Fuses (FOSOL): Located near the reader connections, these provide overcurrent protection.
- Main Processor (Center): The central integrated circuit (e.g., 379M2K203C9B) responsible for board operations.
- Model and Certification Labels (Mid-Right): Labels indicating the model number (MR52-S3B) and various certifications (UL, CE, FCC).
4. Setup and Installation
This section outlines the general steps for installing and connecting the MR52-S3B controller. Refer to the detailed wiring diagrams provided with your complete access control system for specific configurations.
4.1. Mounting
Mount the MR52-S3B board securely within an appropriate enclosure, ensuring adequate ventilation and protection from environmental factors. Use non-conductive standoffs to prevent short circuits.
4.2. Wiring Connections
All wiring should be performed with power disconnected. Use appropriate gauge wiring for all connections.
- Power Connection: Connect the appropriate 12V DC power supply to the designated 12V PT terminals. Ensure correct polarity. The board also provides 5V and 3.3V outputs for compatible devices.
- RS-485 Host Connection: Connect the RS-485 communication lines (TR+, TR-, GND) from your intelligent controller to the RS-485 terminal block on the MR52-S3B.
- Reader Connections: Connect your card readers to the READER 1 and READER 2 terminal blocks. Ensure Data Out (DO) and Data In (DI) lines are correctly matched according to your reader's specifications (e.g., Wiegand, OSDP).
- Input Connections: Connect sensors, door contacts, or other input devices to the IN1-IN8 terminals. Utilize the TB1-TB8, TMP, GND, and PFL terminals as required by your system design.
- Relay Output Connections: Connect the devices to be controlled (e.g., door strikes, alarms) to the RLY 1-6 output terminals. Observe maximum current ratings for each relay.
5. Operating Instructions
The MR52-S3B operates as an interface module, extending the capabilities of a compatible HID Mercury intelligent controller. Its operation is primarily managed by the host controller's software.
- Power On: After all connections are verified, apply power to the MR52-S3B. Observe any status LEDs for initial power-up and communication.
- Communication: The MR52-S3B will establish communication with the host intelligent controller via the RS-485 interface. Ensure the host controller is properly configured to recognize the MR52-S3B.
- Reader Functionality: Once connected and configured, the card readers will transmit data through the MR52-S3B to the host controller for authentication.
- Input Monitoring: The host controller will monitor the status of connected input devices via the MR52-S3B.
- Output Control: The host controller will send commands through the MR52-S3B to activate or deactivate the relay outputs.
6. Maintenance
The MR52-S3B is designed for reliable operation with minimal maintenance. However, periodic checks can help ensure continued performance.
- Cleaning: Periodically inspect the board for dust accumulation. If necessary, gently clean with a soft, dry brush or compressed air. Ensure power is off before cleaning.
- Connection Integrity: Occasionally check all wiring connections to ensure they are secure and free from corrosion.
- Firmware Updates: Consult your system integrator or MERCURY SECURITY support for information on available firmware updates. Updates should only be performed by qualified personnel following official procedures.
- Fuse Replacement: If a fuse (FOSOL) blows, replace it with a fuse of the exact same type and rating to prevent damage.
7. Troubleshooting
This section provides guidance for common issues. For complex problems, contact technical support.
| Problem | Possible Cause | Solution |
|---|---|---|
| No power to the board. | Incorrect power connection, faulty power supply, blown fuse. | Verify power supply output and connections. Check and replace fuses if necessary. |
| No communication with host controller. | Incorrect RS-485 wiring, incorrect addressing, host controller configuration issue. | Check RS-485 wiring for correct polarity and continuity. Verify device addressing and host controller settings. |
| Card reader not responding. | Incorrect reader wiring, incompatible reader type, faulty reader. | Ensure reader wiring (DO/DI) is correct. Confirm reader compatibility with MR52-S3B and host controller. Test with a known-good reader. |
| Relay output not activating. | Incorrect wiring to controlled device, host controller command issue, faulty relay. | Verify wiring to the controlled device. Check host controller logs for relay activation commands. |
8. Specifications
Technical specifications for the MERCURY SECURITY MR52-S3B Controller:
| Feature | Detail |
|---|---|
| Brand | MERCURY SECURITY |
| Model Number | MR52-S3B |
| Hardware Interface | Serial Interface |
| Compatible Devices | Mercury EP series intelligent controllers |
| Item Weight | 0.36 Kilograms |
| UPC / GTIN | 643690810353 |
| Operating System | Multiple (Host Controller Dependent) |
| Certifications | UL 294 recognized, CE compliant, FCC, RoHS |
| Encryption | AES 128/256 bit data encryption |
| Compliance | HSPD-12/FIPS-201 compliant |
9. Warranty and Support
The MERCURY SECURITY MR52-S3B Controller is covered by a manufacturer's warranty. For specific warranty terms and conditions, please refer to the documentation provided with your purchase or visit the official MERCURY SECURITY website.
For technical assistance, troubleshooting beyond this manual, or inquiries regarding product support, please contact your authorized MERCURY SECURITY distributor or technical support team.
