MR50 Single Door Module Setup

Series 2 MR50 Module	Series 3 MR50 Module

1.0 Introduction

The MR50 (Single Door Module) has all the I/O needed for controlling a single door. Each MR50 will interface one card reader, two general purpose input monitor points and two control relays to provide access control and security monitoring through an intelligent controller. The Reader Interface provides a solution for interfacing to a TTL/Wiegand type reader. The Reader Interface can accept data from a reader with clock/data or Wiegand signaling, provides a tri-state LED control and buzzer control.

Two form-C relay outputs may be used for strike control or alarm signaling. Two supervised inputs are provided for monitoring the door contact and exit push button. Communication to the interface is accomplished via a 2-wire RS-485 interface.

Note: Series 3 Mercury modules are fully compatible and interchangeable with Series 2 modules.

2.0 Hardware Configuration

2.1 Power to the Module

The interface requires 12VDC ±15%. The power source must be filtered. DO NOT use AC transformers directly to power the interface. The 12VDC is passed to the telco modular jack and is available for powering a reader.

2.2 Communication Wiring

The Interface communicates to a controller via a half duplex multi-drop RS-485 interface. The total cable length is limited to 4,000 feet (1,200 meters). Shielded cable of 24AWG with characteristic impedance of 120 ohm is specified for the RS-485 interface. The last devices on both end of the cable should have the termination installed (set jumper J4 on).

2.3 J2 Jumper Settings

Each SDM must be configured with a unique address and correct baud rate using the J2 jumpers. There are 8 jumpers in total. The first 5 are used to set the device address.

Note: The first module to be added to the controller's communication port will be configured in the software as address 0, the second module to be added to the bus is addressed as 1, and so on.

Jumpers 6 and 7 are used to set the communication baud rate. By default, all MSC downstream modules hardware is configured to communicate using 38,400 baud rate (pins are shorted).

(The two black dots indicate that the jumper is NOT installed across both pins).

3.0 Setup Procedure

1. Set the correct address for the module using jumpers 1-5 of J2.
2. Set the correct baud rate using jumpers 6 and 7 of J2 (jumper 8 is not used).
3. If the MR50 will be the last module on the RS-485 network, ensure a jumper is across both pins of J4. This will engage the 120 OHM line terminating resistor.
4. Connect the RS-485 network on the TB1 connector.
5. Apply power to the module on the TB2 connector.
6. In the Doors.NET software, click on Setup >> Hardware Setup >> All.
   
   
   
   
7. Double-click the controller that the module is connected to, in this example an EP-1502. You may see displayed on the hardware tree additional devices that are already added to the controller.
   
   
   
   
8. Select either the TB2 or TB3 port (some Mercury controllers only have a TB3 port).
9. Click the MR50 icon from the SCP hardware select ribbon, if you are adding a Series 2 module.
   
   
   
   
10. Or click the MR52-S3 icon from the Mercury Security hardware select ribbon, if you are adding a Series 3 module.
    
    
    
    
11. A dialog box will appear, giving you the option to add multiple SDM modules and to change the default description.
    
    
    
    
12. Click ACCEPT and the MR50 module will immediately be added to the hardware tree.
13. If the MR50 single door module is configured with the correct address and baud rate, you should see events appear from the module in the live events grid.
    
    
    
    
14. Highlight the MR50 on the hardware tree and in the properties, displayed on the right, it should show as online.