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Serial I/O Controller
Authentic Mercury MR serial Input/output (SIO) devices
represent the secondary level in Mercury’s distributed
architecture. The devices offer flexibility for our OEM
partners, ensuring they can choose the controller that best
fits their needs.
The MR51e is a single-door, network-ready and edgecapable interface panel that provides specific door
oversight, point control and monitoring in a single device.
It is an ideal integration solution when a direct network
connection to a single door is required. The economical,
high-performance device is compact and is easy to install
anywhere. It also provides the I/O needed with PoE for
complete door functionality.
Features
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Multi-facility code support
PoE enabled
Auto-addressable
AES 128 bit data encryption
HSPD-12/FIPS201 compliant
UL 294 recognized
Universal I/O device characterization
Benefits
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Economical
Network enabled and web configured,
providing greater flexibility to installers
Highly adaptable to a variety of sensors and
reader technologies
Supports OSDP, Wiegand, clock and data,
magnetic stripe, F2F, Supervised F2F, keypads, LCD and biometrics
www.mercury-security.com
Two reader ports support separate in/out readers and a
range of reader technologies: OSDP, Wiegand, clock and
data, magnetic stripe, keypads, LCD and biometrics. Autoaddressable and directly managed by the Authentic Mercury
intelligent controllers, the MR51e is capable of elaborate
processes and procedures without host intervention.
Application Notes
The MR51e can relate the activities of selected system
devices to other devices within the system, generating
actions and allowing activities to occur independent of the
host.
The MR51e supports paired readers to enhance its ability
to meet installation challenges, such as placing readers
at varying heights or distances (to accommodate ingress
and egress of handicapped, vehicle and/or foot traffic).
These readers can be logically linked together but function
independently when a credential is presented to either
one. When access rights are granted, the same relay will
function, as programmed, to unlock the opening.
Give your access control system wings.
Serial I/O Controller
MR51e
The interface is for use in low voltage, class
2 circuits only.
Power Input:
PoE Power Input 12.95W, compliant to
IEEE
802.3af – OR --10 – 14Vdc
Power Supply
Cable Requirements:
Power: 18AWG, 1 twisted pair
RS-485: 24AWG, 120-ohm impedance,
twisted pair with shield, 4000-foot
(1,219 m) maximum
Alarm Inputs:
Power Output:
12Vdc @ 700mA including reader and
AUX output
Form-C contacts: K1, K2: 5A @ 28Vdc
4 supervised, End of Line resistors,
1k/1k - ohm,1% 1/4W watt standard
Output:
Inputs:
Reader Interface:
Reader Power:
Reader data (TTL): 18AWG, 6 conductors, 500-foot
(150 m) maximum
Reader data
(RS-485):
24AWG, 120-ohm impedance, twisted
pair with shield, 2000- foot
(1,219 m) maximum
Mechanical:
Dimension:
5.5” (140mm)W x 2.75”(70mm)
Weight:
4.2 oz. (120g) without bracket
12 Vdc±10% or pass through.
(PTC limited 150mA max)
Reader LED Output:
TTL compatible, high > 3V, low <
0.5V, 5mA source/sink maximum
Open collector, 5Vdc open circuit max.
10mA sink maximum
Buzzer Output:
1 twisted pair per input, 30-ohm maximum
Environment:
Temperature:
-55°C to +85°C, storage
0°C to +70°C, operating
10% to 95% RHNC
Humidity:
Reader Data Inputs: TTL compatible inputs or 2-wire RS-485
Standards:
Communication:
UL294 Recognized, CE Compliant, ROHS,
FCC Part 15 Class A, NIST Certified
Encryption
Ethernet, 10Base-T/100Base-TX
Network Switch
To Mercury OEM Host
CAT5/CAT 6
MR51e
1
2
3
4
Door 1
EP1502
9
2
10
3
11
4
12
5
13
6
14
NC
K2
7
15
NO
K4
8
16
C
NO
3
4
5
6
7
8
9
10 11 12 13 14 15
16
NC
C
K9
K1
NO OUT 9
TB5
TB1
NC
NO
NC
C
OUT 2
OUT 3
NC
OUT 4
NO
C
NO OUT 10
K10
K11
K3
NC
K12
C
NO OUT 11
NC
C
NO
K14
NC
C
C
NC
NO OUT 13
TB7
TB3
BA
OUT 5
K13
K6
NO
BA
NO
NC
C
K15
K7
K1
C
NC
J5
NO OUT 14
NO
8 7 6 5 4 3 2 1
NC
K8
C
NO OUT 115
TB8
NO
NC
K16
NC
OUT 7
TB4
C
U1
C
C
NC
OUT 8
NO OUT 16
J6
A
CT
GND
J1
S1
U1
1
2
3
4
5
6
7
8
J2
J3
TB10
J3
VIN
2W
4W
J1, J2
RS-485
TERM
J8
TB11
J4
12 34 567 8
R+
GND
CT
BA
TR+
TR-
R-
B
J7
J4
J2
TR-
TR+
VO
GND
TB1
DAT
D0
TB4
GND
4W
RS-485
BZR
BA
GND
K2
2W
LED
B
K1
J5
TB9
GND
A
DAT
D1
OUT 12
C
K5
NC
CT
OUT 6
J6
2
C
OUT 1
TB6
TB2
MR50
1
1
TB2
I1
VIN
C
I1
GND
I2
NC
C
NO
NO
TB3
MR52
K2
1
2
3
4
K2
NC
K1
I2
RS485
MR16IN
Door 1
MR16OUT
Door 2
Door 1
Door 2
Door 1
The Authentic Mercury open platform delivers quality assurance derived from the most proven and
reliable hardware in the industry. Driven by our engineering excellence and technology leadership.
Authentic Mercury hardware is designed as an access control platform that easily encompasses
emerging technologies, changing industry standards and evolving system environments.
Make yours Authentic, Make sure its Merc.