Mercury Security Corporation © 2011 MR52 DOC 10107-0015 REV 2.02 Page 1
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.
MR52 READER INTERFACE
Installation and Specifications:
1. General:
The MR52 reader interface provides a solution to the OEM system integrator for interfacing to
TTL/Wiegand/RS-485 type readers and door hardware. The MR52 can accept data from reader with
clock/data, Wiegand or RS-485 signaling, provide a tri-stated LED control and buzzer control. Six form-C
relay outputs may be used for strike control or alarm signaling. Eight supervised inputs are provided for
monitoring the door contact, exit push button and alarm contacts. Communication to the MR52 is
accomplished via a 2-wire RS-485 interface.
The MR52 requires 12 to 24Vdc for power. See the following figure for component location.
IN1 IN2 IN3 IN4
TB1
TB2
INPUTS
TB3
IN5 IN6
TB4
IN7 IN8
TB5
TMP
GND
PFL
GND
A B 1 2 3 4 5 6 7 8 PFL R1 R2TMP
J7J8
J9
J10
J14
J13
U1
S1
12345678
READER 2
VOLEDBZRCLKDATGND
D1D0
VOLEDBZRCLKGND
D1D0
DAT
READER 1
TB8
TB9
NC NO C NC
RLY 1
CNO
RLY 2RLY 4 RLY 3
NO CNONCC NC
RLY 6 RLY 5
NO CNONCC NC
TB10
TB11
TB12
J12
K1 K2 K3 K4 K5 K6
12V PT
J2
J3
J15
2 W 4W
RS-485
TR-
R+
R-
GND
TR+
TB6
J5
J6
TB7
VIN
GND
J11
J5, J6
TERMINATOR
K1
K2
K3
K4
K5
K6
2.00 [50.80] 3.00 [76.20] 2.00 [50.80]
8.00 [203.20]
.25 [6.35] 5.50 [139.70]
6.00 [152.40]
STATUS LEDs
READER INTERFACE
DIP SWITCHES
RELAY STATUS LEDs
OUTPUTS
Ø.156 [Ø4.0]
8 PLACES
SIO COMMUNICATION
PORT, RS-485
POWER IN
12-24Vdc
INPUTS
.50 [12.70]
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