Keri Systems MR51e User Manual

Page 6

MR51e

DOC 10107-0035

REV 1.05

Page 6

10. Specifications:

The interface is for use in low voltage, Class 2 circuits only.

Power Input:

PoE Power Input 12.95 W, compliant to IEEE 802.3af
– OR –
12 Vdc



10%, 900 mA maximum

Power Output:

12 Vdc @ 650 mA maximum (reader and AUX outputs combined)
Reader (TB3) 12 Vdc (10.3 through 12.6) @ 150 mA maximum
AUX (TB5) 12 Vdc (10.7 through 13.0) @ 650 mA maximum

Note: For UL, the Power Sourcing Equipment (PSE) such as a PoE enabled network switch and/or PoE
power injectors must be UL Listed under UL294.

Output:

2 outputs, Form-C contacts rated at 5 A @ 30 Vac/dc

Inputs:

4 unsupervised/supervised, End of Line resistors, 1k/2k ohm, 1% 1/4 watt
standard

Reader Interface:

Reader Power:

See Power Output above.

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

Reader Data Inputs:

TTL compatible inputs or 2-wire RS-485

Cable Requirements:

Communication:

Ethernet, Category 5, minimum

Power:

18 AWG, 1 twisted pair

Alarm Inputs:

1 twisted pair per input, 30 ohm maximum

Reader data (TTL):

18 AWG, 6 conductors, 500 foot (152 m) maximum

Reader data (RS-485):

24 AWG, 120 ohm impedance, twisted pair, shield, with drain wire, 2000 foot
(609.6 m) maximum

Mechanical:

Dimension:

5.5" (140 mm) W x 2.75" (70 mm) L x 0.96" (24 mm) H without bracket
5.5" (140 mm) W x 3.63" (92 mm) L x 1.33" (34 mm) H with bracket

Weight:

4.2 oz. (120 g) without bracket
5.3 oz. (150 g) with bracket

Environment:

Temperature:

-55 to +85



C, storage

0 to +70



C, operating

Humidity:

10 to 95% RHNC