Mercury MR52 (Dual Door Module) Setup

Mercury MR52 (Dual Door Module) Setup

1.0 Introduction

The Mercury MR52 is a dual door, dual reader module that connect to Mercury EP, LP or MP controllers via 2-wire RS-485. The module supports 2 card readers, including OSDP readers and it has 8 inputs and 6 relays.

Four of the inputs are reserved for door functionality (door contact and request-to-exit) for each door, and 2 of the relays are pre-configured as strike relays. The remaining inputs and outputs can be used for general purpose I/O control.

The MR52 Series 2 module is a green-colored PCB and the MR52 Series 3 is a red colored PCB. Both module types are compatible with each other and completely interchangeable. 

Mercury MR52 Series 2
Mercury MR52 Series 3




2.0 Power Supply to the MR52

The MR52 accepts 12VDC to 24VDC for power. Locate the power source as close to the interface as possible. Make power connection with a minimum of 18AWG wires. The input voltage is filtered and regulated to 5VDC or 12VDC.

 

 

3.0 S1 DIP Switch Setting and Controller Addressing

  1. The MR52 has a DIP switch (S1) - this is used to set the address and baud rate of the module. Switches 1 to 5 are used to set the device's RS-485 address. Switch 6 and 7 select the communication baud rate (the default baud rate for SCP hardware is 38,400). All other configuration settings are set via host software.



  2. The System Processor Module, for example: an LP4502, is assigned SPM number 0 - You can see this if you enable Advanced View for the controller properties and look within the Miscellaneous section.

    Note: The SPM address is separate from the RS-485 address of downstream modules added to TB2 or TB3.



  3. The first downstream device/module added to the RS-485 bus is addressed as 0 by default. So if the MR52 is the first device you should therefore set S1 to address 0.
  4. The MR52 module communicates to a Mercury SPM/controller via the RS-485 communication link (TB6 connector on the MR52). The interface allows for multi-drop communication on a bus of up to 4,000 feet (1,200 m). The RS-485 interface can be set for either 2-wire or 4-wire configuration via the J3 jumper. By default the J3 jumper is set to 2-wire.



4.0 Add the MR52 to Doors.NET 

Note: To add an MR52 dual door module to Doors.NET you must already have an EP, LP or MP SPM (controller) added and online.
  1. In Doors.NET go to Setup >> Hardware Setup >> All.
  2. The hardware tree will be displayed.
  3. At the top of the hardware tree will be the SCP/MSC (Mercury) communication gateway. Beneath the gateway the controllers will be listed.
  4. Select the controller which has the MR52 connected and refer to the properties on the right. 
  5. Ensure that the controller is showing as online.



  6. Expand the Mercury SPM on the hardware tree.



  7. You will see the TB2 entry if the controller only has 1 RS-485 port or TB2 and TB3 if there are 2 RS-485 ports.
  8. Select the port which the MR52 is connected to. 



  9. Click the MR52 icon from the hardware select ribbon bar.



  10. The MR52 module will be added to the TB2/TB3 entry on the hardware tree.
  11. Select the MR52 on the hardware tree and the module's properties will be displayed on the right.

    Note: By default, the first module added to the RS-485 port will be addressed as 0, by default. To edit the module's assigned address you will need to have Advanced View enabled.



  12. Ensure the address matches what is set on the S1 DIP switch (as explained in step 3.0).
  13. If the MR52 is addressed correctly and set to the correct baud rate it should almost immediately show as online.
  14. Open Live Events and you should see events being posted from the MR52 module indicating - further indicating that the module is online.

    Note: By default, the baud rate for the module is 38,400 - this is set in the properties of TB2/TB3 and is applied to all downstream devices/modules which are added to the bus.

TB2/TB3 Communication Port Settings