Keri Systems EP1502 - Manual (Page 7)

Mercury Security Corporation © 2011 EP1502 DOC 10107-0031 REV 1.05 Page 7
11. Specifications:
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: 12-24 Vdc±10%, 500 mA maximum (reader current not included)
12 Vdc @ 250 mA (plus reader current) nominal
24 Vdc @ 150 mA (plus reader current) nominal
Memory and Clock
Backup Battery:
3 Volt Lithium, type BR2325, BR2330 or CR2330
Host Communication: Ethernet: 10BaseT/100Base-TX, and RS-232; 9,600 to 115,200 bps,
asynchronous, half-duplex, 1 start bit, 8 data bits, and 1 stop bit.
SIO Communication 2-wire RS-485, 2,400 to 115,200 bps, asynchronous, half-duplex,
1 start bit, 8 data bits, and 1 stop bit.
Inputs: Two dedicated for tamper and UPS fault monitoring.
Eight for door position monitoring, request to exit or alarm contacts.
Relays: Four each: Form-C, 5 A @ 30 Vdc, resistive.
Reader Interface:
Reader Power: 12 Vdc±10% regulated, current limited to 150 mA for each reader.
(jumper selectable) or
12 to 24 Vdc±10% (input voltage passed through) current limited to 150 mA
for each reader.
Data Inputs: TTL compatible inputs, mag stripe and Wiegand standards supported.
Maximum cable length: 500 ft (152 m).
RS-485 Mode: 9,600 to 38,400 bps, asynchronous, half-duplex, 1 start bit, 8 data bits, and 1
stop bit. Maximum cable length: 2000 ft (609.6 m).
LED Output: TTL levels, high>3 V, Low<0.5 V, 5 mA source/sink maximum.
Buzzer Output: TTL levels, high>3 V, Low<0.5 V, Low=Active, 5 mA source/sink maximum.
Cable requirements:
Power: 1 twisted pair, 18 AWG.
Ethernet: CAT-5, minimum.
RS-485:
(I/O Device Port): 24 AWG, 4,000 ft (1,219 m) maximum, twisted pair(s) with an overall shield.
(Reader Port): 24 AWG, 2,000 ft (609.6 m) maximum, twisted pair(s) with an overall shield.
RS-232: 24 AWG, 25 ft (7.6 m) maximum.
Alarm Input: 1 twisted pair, 30 ohms maximum, typically 22 AWG @ 1000 ft (304.8 m).
Environmental:
Temperature: 0 to 70 °C, operating, -55 to +85 °C, storage
Humidity: 10 to 95% RHNC
Mechanical:
Dimension: 8 in (203.2 mm) W x 6 in (152.4 mm) L x 1 in (25 mm) H
Weight: 9 oz (255 g) nominal, board only