Keri Systems MR50 User Manual

Page 4

MR50

DOC 10107-0009

REV 2.03

Page 4

4. Status LEDs:

Power-up:

All LED’s OFF.

Initialization: Once power is applied, initialization of the module begins.

The A LED is turned ON at the beginning of initialization.

Run time: After a successful initialization, the LEDs have the following meanings:

A LED: Heartbeat and On-Line Status:
Off-line: 1 second rate, 20% ON
On-line:

Non-encrypted communication: 1 second rate, 80% ON
Encrypted communication:
.1 S ON, .1 S OFF, .1 S ON, .1 S OFF, .1 S ON, .1 S OFF, .1 sec ON, .3 S OFF

A LED Error Indication:
Waiting for application firmware to be downloaded: .1 S ON, .1 S OFF.

B LED: SIO Communication Port Status:
Indicates communication activity on the SIO communication port

5. Specifications:

The Interface is for use in low voltage, class 2 circuits only.

Primary Power:

12 to 24 Vdc ± 10%, 150 mA maximum (plus reader current)
12 Vdc @ 110 mA (plus reader current) nominal
24 Vdc @ 60 mA (plus reader current) nominal

Outputs:

2, Form-C contact relays: K1: 5 A @ 30 Vdc, K2: 1 A @ 30 Vdc

Inputs:

2 unsupervised/supervised, standard EOL, 1k/2k ohm, 1% 1/4 watt
1 unsupervised, dedicated for cabinet tamper

Reader Interface:

Reader power:

12 to 24 Vdc±10% (input voltage passed through)

Reader LED output:

TTL compatible, high > 3 V, low < 0.5 V, 5 mA source/sink maximum

Buzzer output:

Open collector, 5 Vdc open circuit maximum, 10 mA sink maximum

Data Inputs:

TTL compatible, mag stripe and Wiegand standards supported.

RS-485 Mode:

9600 bps, asynchronous, half-duplex, 1 start bit, 8 data bits, and 1
stop bit. Maximum cable length: 2000 ft (609.6m)

Communication:

2-wire RS-485: 9600, 19200, 38400 or 115200 bps

Cable Requirements:

Power:

18 AWG, 1 twisted pair

RS-485 I/O devices:

24 AWG, 120 ohm impedance, twisted pair with shield, 4,000 ft
(1,219 m) maximum

Alarm Inputs:

1 twisted pair per input, 30 ohms maximum, typically 22 AWG @
1000 ft (304.8 m)

Outputs:

As required for the load

Reader data (TTL):

18 AWG, 6 conductor, 500 ft (150 m) maximum

Reader data (RS-485): 24 AWG, 120 ohm impedance, twisted pair with shield, 2,000 ft

(609.6 m) maximum

Mechanical:

Dimension:

4.25 in (108 mm) W x 2.75 in (70 mm) L x 1 in (25.4mm) H

Weight:

4 oz. (120 g) nominal