HID Mercury MR52-S3 Installations And Specifications page 15

Powering
Trusted Identities
Revision D assembly:
The Interface is for use in low voltage, class 2 circuits only.
The installation of this device must comply with all local fire and electrical codes.
Primary power
Outputs
Inputs
Reader interface
Power
(jumper selectable)
Data inputs
LED output
Buzzer output
Communication
Cable requirements
Power
RS-485 I/O devices
Alarm inputs
Outputs
Reader data (TTL)
Reader data (F/2F)
Reader data (RS-485)
Mechanical
Dimension
Weight
Environment
Storage temperature
Operating temperature
Humidity
PLT-05248, A.2
12 to 24 V DC ± 10%, 550 mA maximum (reader current not included)
Six Form-C relays
Normally open contact (NO) contact: 5 A @ 30 V DC resistive
Normally closed contact (NC) contact: 3 A @ 30 V DC resistive
Eight unsupervised/supervised, standard EOL: 1k/1kΩ, 1%, ¼ watt
Two unsupervised, dedicated for cabinet tamper and UPS fault monitoring
12 V DC ± 10% regulated, 300 mA maximum each reader
(input voltage (VIN) must be greater than 20 V DC)
or
12 to 24 V DC ± 10% (input voltage passed through), 300 mA maximum each reader
TTL compatible, F/2F or 2-wire RS-485
TTL compatible, high > 3 V, low < 0.5 V, 5 mA source/sink maximum
Open collector, 12 V DC open circuit maximum, 40 mA sink maximum
2-wire RS-485: 9600, 19200, 38400 or 115200 bps
1 twisted pair, 18 AWG
1 twisted pair with drain wire and shield, 24 AWG, 120Ω impedance, 4,000 feet
(1,200 m) maximum
One twisted pair per input, 30Ω maximum
As required for the load
6-conductor, 18 AWG, 500 feet (150 m) maximum
4-conductor, 18 AWG, 500 feet (150 m) maximum
1 twisted pair with drain wire and shield, 24 AWG, 120Ω impedance, 2,000 feet
(610 m) maximum
6 inches (15 2 mm) W x 8 inches (203 mm) L x 1 inches (25 mm) H
11 oz. (312 g) nominal
-55 to +85°C
0 to +70°C
5 to 95% RHNC
HID Mercury™ MR52-S3 Reader Interface
15
Installation and Specifications
June 2021