MD-D02-U Two Reader Expansion Board Access Control Module
The MDD02U two reader expansion board enhances access management systems with support for additional doors, readers, relay outputs, and supervised inputs. Designed for advanced security environments, this expansion solution improves system flexibility for commercial, industrial, and residential applications. It supports keypad, biometric, and reader integration while offering configurable input and output settings for efficient deployment. Compact construction, status indicators, and modular expansion capability make it an ideal choice for scalable access control installations requiring dependable performance and streamlined integration.
- Adds support for two readers and two doors
- Four relay outputs and four supervised inputs
- Supports keypad biometric and reader integration
- Status indicators simplify monitoring and operation
- Compact design supports modular installations
Adds support for two additional proximity readers or keypads, expanding access control capabilities for larger residential and commercial installations.
Enhances Rosslare AC-225 and AC-525 networked access controllers by adding two reader connections and support for two additional doors.
Provides four relay outputs and four supervised inputs to increase system flexibility and control options.
Supports Wiegand and Clock-and-Data transmission formats for compatibility with keypads, proximity readers, and biometric devices.
Features LED status indicators for 12V power monitoring and relay activation feedback for simplified diagnostics.
Delivers a modular and cost-effective installation solution for scalable access control deployments.
Compatible with Rosslare’s AS-525 AxTrax software for input and output reconfiguration and system customization.
Operates using 12V DC supplied directly from the host controller for streamlined integration.
Supports up to 300mA maximum reader current for reliable reader performance.
Equipped with Form-C relay outputs featuring Normally Open, Normally Closed, and Common contacts for versatile control applications.
Compact design measuring 100 x 75.9 x 32.5 mm allows convenient installation in access control enclosures.
Includes tamper input functionality to strengthen system security and monitoring.
Built to Rosslare quality standards and backed by ISO9001-certified manufacturing processes.
Protected by a 5-year limited manufacturer warranty for long-term reliability and confidence.
| MODEL NAME | Rosslare MD-D02U 2 Reader Expansion Board - AC225 |
| BRAND | Rosslare |
| PRODUCT TYPE | 2 Reader Expansion Board |
| SKU | ROS-MD-D02-U |
| NSID | 42160 |
| SYSTEM TYPE | Access Control Expansion Module |
| COMPATIBLE CONTROLLER | AC-225 Networked Access Controller |
| COMPATIBLE CONTROLLER | AC-525 Networked Access Controller |
| APPLICATION | Residential Access Control |
| APPLICATION | Commercial Access Control |
| COMMUNICATION TYPE | Advanced Controller Communication |
| READER SUPPORT | Adds 2 Readers |
| DOOR SUPPORT | Adds 2 Doors |
| RELAY OUTPUTS | 4 Outputs |
| SUPERVISED INPUTS | 4 Inputs |
| READER TYPE SUPPORT | Proximity Readers |
| READER TYPE SUPPORT | Keypads |
| TRANSMISSION TYPE | Wiegand |
| TRANSMISSION TYPE | Clock-and-Data |
| BIOMETRIC READER SUPPORT | Yes |
| LED STATUS INDICATION | 12V Power Status |
| LED STATUS INDICATION | Relay Activation Status |
| INSTALLATION TYPE | Modular Installation |
| INSTALLATION BENEFIT | Cost Effective Design |
| CONFIGURATION SOFTWARE | Rosslare AS-525 AxTrax Software |
| I/O RECONFIGURATION | Supported |
| INPUT VOLTAGE | 12V DC from Host Controller |
| INPUT CURRENT STANDBY | 30mA |
| INPUT CURRENT MAXIMUM | 135mA |
| NUMBER OF READER PORTS | 2 |
| NUMBER OF INPUTS | 4 |
| OUTPUT RELAY TYPE | Form-C Relays |
| OUTPUT RELAY RATING | 4 x 5A |
| RELAY CONTACT TYPE | N.O., N.C. and COM Contacts |
| INPUT VOLTAGE MAXIMUM | 5V DC |
| READER OUTPUT VOLTAGE | 12V DC |
| MAXIMUM READER CURRENT | 300mA |
| LED CONTROL OUTPUT | Open Collector |
| LED CONTROL STATE | Active Low |
| TAMPER INPUT VOLTAGE | 5V DC Maximum |
| POWER LED FUNCTION | Indicates Power Source Connection |
| OUTPUT LED QUANTITY | 4 LEDs |
| OUTPUT LED FUNCTION | Active When Relay Activates |
| OUTPUT CONTACT CONDITION | N.O. to COM Contacts Shorted |
| LENGTH | 100 mm (3.93 in) |
| WIDTH | 75.9 mm (2.98 in) |
| HEIGHT | 32.5 mm (1.28 in) |
| DIMENSIONS | 100 x 75.9 x 32.5 mm |
| CERTIFICATION | ISO9001 Certified Manufacturing Operations |
| CERTIFICATION BODY | TUV Rheinland |
| WARRANTY | 5-Year Limited Manufacturer Warranty |
| GUARANTEE | Rosslare International Guarantee |
| SYSTEM EXPANSION TYPE | Controller Expansion Board |
| ACCESS CONTROL CATEGORY | Networked Access Control |
| HOST POWER SOURCE | Controller Powered |
| PRODUCT FUNCTION | Expands Access Control Controller Capacity |
Rosslare MDD02U 2 Reader Expansion Board is a flexible access control expansion module designed to extend the capabilities of Rosslare AC-225 and AC-525 networked access controllers. Engineered for residential and commercial access control applications, this expansion board adds two reader connections, two door control points, four relay outputs, and four supervised inputs, providing scalable system growth while maintaining seamless controller communication.
Expand Access Control Performance and Flexibility
The MDD02U Expansion Board supports additional proximity readers, keypads, and compatible biometric devices using Wiegand or Clock-and-Data transmission. Designed for modular and cost-effective installation, it enhances system functionality while maintaining reliable integration with Rosslare access management platforms. LED indicators provide clear system feedback for power and relay activation status, helping installers simplify diagnostics and maintenance.
- Adds support for two additional proximity readers or keypads
- Four relay outputs and four supervised inputs
- Compatible with biometric readers and keypad devices
- Wiegand and Clock-and-Data transmission compatibility
- LED indicators for power and relay activity monitoring
- Modular design for scalable access control installations
Designed for Commercial and Residential Access Systems
Built for integration with Rosslare AC-225 and AC-525 networked access controllers, the MDD02U enables installers and security professionals to expand door control capabilities without replacing existing infrastructure. Configuration flexibility is supported through Rosslare AS-525 AxTrax software, allowing input and output customization for diverse security applications.
- Commercial office access control systems
- Residential gated entry solutions
- Multi-door security deployments
- Biometric and credential-based access environments
Security professionals seeking a reliable and scalable access control expansion solution can depend on the Rosslare MDD02U to deliver flexible integration, dependable performance, and efficient installation for growing access control requirements.
Technical Specifications
- Model: MDD02U
- Input Voltage: 12V DC from host controller
- Standby Current: 30mA
- Maximum Current: 135mA (excluding connected devices)
- Reader Ports: 2
- Inputs: 4 supervised inputs
- Relay Outputs: 4 x 5A Form-C relays (N.O., N.C., COM)
- Maximum Input Voltage: 5V DC
- Reader Output Voltage: 12V DC
- Maximum Reader Current: 300mA
- LED Control Output: Open collector, active low
- Tamper Input Voltage: 5V DC maximum
- Dimensions: 100 x 75.9 x 32.5 mm (3.93 x 2.98 x 1.28 in)
- Software Compatibility: Rosslare AS-525 AxTrax
- Controller Compatibility: Rosslare AC-225 and AC-525
- Warranty: 5-Year Limited Manufacturer Warranty
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