February, 2019 eMAX-LP1502-Man Page 13 of 20
13. 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 to 24 Vdc ± 10 %, 500 mA maximum (reader and USB ports not
included)
Reader Ports: 600 mA maximum (add 600 mA to primary power current)
Micro USB Port: 5 Vdc, 500 mA maximum (add 270 mA to primary power current)
Memory and Clock
Backup Battery: 3 Volt Lithium, type BR2330 or CR2330
microSD Card: Format: microSD or microSDHC; 2GB to 8GB
Host Communication: Ethernet: 10-BaseT/100Base-TX and Micro USB port (2.0) with optional
adapter: pluggable model USB2-OTGE100
Serial I/O Device: One each: 2-wire RS-485, 2,400 to 115,200 bps, asynchronous, half-
duplex, 1 start bit, 8 data bits, and 1 stop bit
Inputs: Eight unsupervised/supervised, standard EOL: 1k/1k ohm, 1%, ¼ watt
Two unsupervised dedicated for cabinet tamper and UPS fault
monitoring
Outputs: Four relays, Form-C with dry contacts
Normally open contact (NO) contact: 5 A @ 30 Vdc resistive
Normally closed contact (NC) contact: 3 A @ 30 Vdc resistive
Reader Interface:
Power: 12 Vdc ± 10 % regulated, 300 mA maximum each reader
(jumper selectable) (input voltage (VIN) must be greater than 20 Vdc)
or
12 to 24 Vdc ± 10 % (input voltage (VIN) passed through), 300 mA
maximum each reader
Data Inputs: TTL compatible, F/2F or 2-wire RS-485
RS-485 Mode: 9,600 to 115,200 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: Open collector, 12 Vdc open circuit maximum, 40 mA sink maximum
Cable requirements:
Power and Relays: 1 twisted pair, 18 to 16 AWG
Ethernet: CAT-5, minimum
RS-485:
(I/O Device Port): 1 twisted pair, shielded, 120 ohm impedance, 24 AWG, 4,000 ft. (1,219
m) max.
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