Mercury Security MR50 Installations And Specifications

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.
READER
DATA1/CLOCK/TR+
DATA0/DATA/TR-
SIO COMM.
RS-485
INTERFACE
Mercury Security Corporation © 2014
2355 MIRA MAR AVE. LONG BEACH, CA 90815-1755, (562)986-9105 FAX (562) 986-9205
Status Leds
0.20 [5.1]
TB4
GND
BZR
LED
CLK
D1
DAT
D0
VO
TR+
TR-
GND
TB1
J2
1 2 3 4 5 6 7 8
0.20 [5.1]
TB4
GROUND
GND
BUZZER
BZR
LED
LED
CLK
D1
DAT
D0
READER POWER
VO
TR+
TR+
TR-
TR-
GROUND
GND
TB1
J2
1 2 3 4 5 6 7 8
J3
TAMPER, NC
MR50
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.
Ø0.156 [Ø4.0]
4 PLACES
K1
K2
J6
J4
J5
B A
J3
3.85 [97.8]
4.25 [108]
TAMPER INPUT, NORMALLY CLOSED
TB3
NORMALLY CLOSED
NC
K1
COMMON
C
NORMALLY OPEN
NO
NORMALLY OPEN
NO
K2
NORMALLY CLOSED
NC
COMMON
C
+12 to 24 Vdc INPUT VOLTAGE
VIN
INPUT VOLTAGE RETURN
GND
I2
I2
1K,1%
I2 1K,1%
J4
I1
I1
1K,1%
I1
1K,1%
TB2
DOC 10107-0009
www.mercury-security.com
TB3
NC
C
NO
NO
NC
C
VIN
GND
I2
I2
I1
I1
TB2
STRIKE RELAY (K1)
AUX. RELAY (K2)
EXIT REQUEST
NO
NORMALLY OPEN
DOOR CONTACT
NC
NORMALLY CLOSED
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