Mercury Security MR50

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www.mercury-security.com

2355 MIRA MAR AVE. LONG BEACH, CA 90815-1755, (562)986-9105 FAX (562) 986-9205

This device complies with part 15 of the FCC Rules.

Operation is subject to the following two conditions: (1) This

device may not cause harmful interference, and (2) this

device must accept any interference received, including

interference that may cause undesired operation.

MR50 READER INTERFACE

Installation and Specifications:

1. General:

The MR50 reader interface provides a solution to the OEM system integrator for interfacing to a

TTL/Wiegand/RS-485 type reader and door hardware. The MR50 can accept data from a reader with

clock/data, Wiegand signaling or 2-wire RS-485, also provides a tri-stated LED control and buzzer

control. Two Form-C contact relay outputs may be used for strike control or alarm signaling. Two

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. The MR50 requires 12 to 24 Vdc for power.

2. Power, Reader and Door Hardware Wiring:

All interconnections to the interface are via quick-disconnect terminal blocks. The MR50 requires

filtered 12 to 24 Vdc±10% for power. The MR50 supports clock/data, Wiegand or 2-wire RS-485

reader interface signaling. Two inputs are typically used for door contact and exit push button

monitoring. End of line resistors are required for line supervision.

Note: The input power is passed through to the reader terminal strip and is available for powering a

reader. Care must be taken to insure that the input voltage is within the voltage range of the reader.

TB1

GND

TR-

TR+

DAT

GND

LED

CLK

BZR

TB4

B A

TB3

TB2

GND

VIN

K2K1

2.35 [59.7]

2.75 [69.9]

3.85 [97.8]

4.25 [108]

TAMPER INPUT, NORMALLY CLOSED

STATUS LEDs

0.20 [5.1]

Ø0.156 [Ø4.0]

4 PLACES

1K,1%

EXIT REQUEST

NORMALLY OPEN

DOOR CONTACT

NORMALLY CLOSED

COMMON

NORMALLY OPEN

NORMALLY CLOSED

COMMON

+12 to 24 Vdc INPUT VOLTAGE

INPUT VOLTAGE RETURN

STRIKE RELAY (K1)

GROUND

BUZZER

LED

DATA1/CLOCK/TR+

DATA0/DATA/TR-

READER POWER

RS-485

INTERFACE

READER

TAMPER, NC

TB4

GND

CLK

LED

DAT

TR+

TR-

GND

BZR

TB1

GND

VIN

K1 K2

TB3

TB2

AUX. RELAY (K2)

TR-

GROUND

TR+

SIO COMM.

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Mercury Security MR50 Specifications

General

Model	MR50
Category	Controller
Max doors per controller	2
Reader Inputs	2
Outputs	4
Reader Ports	2
Power Supply	12V DC
Housing	Metal
Communication	RS-485
Operating Temperature	0 to 70 °C
Description	The MR50 is an intelligent, single door interface module used to extend the reach of an access control system. It supports one door, controls access using one or two readers, and monitors door status. Designed for easy installation and use, the MR50 provides a cost-effective way to expand the capacity of an access control system.