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
12 to 24 V DC ± 10%, 550 mA maximum (reader current not included)
Outputs
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
Inputs
Eight unsupervised/supervised, standard EOL: 1k/1k
Ω
, 1%, ¼ watt
Two unsupervised, dedicated for cabinet tamper and UPS fault monitoring
Reader interface
Power
(jumper selectable)
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
Data inputs
TTL compatible, F/2F or 2-wire RS-485
LED output
TTL compatible, high > 3 V, low < 0.5 V, 5 mA source/sink maximum
Buzzer output
Open collector, 12 V DC open circuit maximum, 40 mA sink maximum
Communication
2-wire RS-485: 9600, 19200, 38400 or 115200 bps
Cable requirements
Power
1 twisted pair, 18 AWG
RS-485 I/O devices
1 twisted pair with drain wire and shield, 24 AWG, 120
Ω
impedance, 4,000 feet
(1,200 m) maximum
Alarm inputs
One twisted pair per input, 30
Ω
maximum
Outputs
As required for the load
Reader data (TTL)
6-conductor, 18 AWG, 500 feet (150 m) maximum
Reader data (F/2F)
4-conductor, 18 AWG, 500 feet (150 m) maximum
Reader data (RS-485)
1 twisted pair with drain wire and shield, 24 AWG, 120
Ω
impedance, 2,000 feet
(610 m) maximum
Mechanical
Dimension
6 inches (15 2 mm) W x 8 inches (203 mm) L x 1 inches (25 mm) H
Weight
11 oz. (312 g) nominal
Environment
Storage temperature
-55 to +85°C
Operating temperature
0 to +70°C
Humidity
5 to 95% RHNC
PLT-05248, A.2
15
June 2021
Powering
Trusted Identities
HID Mercury™ MR52-S3 Reader Interface
Installation and Specifications
