ELK-AEXIN Input Expander — Installation Instructions

Installation Instructions for the ELK-AEXIN Input Expander — a 16-input, 1-relay hardwired zone expander for the Elk E27 Alarm Engine, connecting via the 4-wire RS-485 data bus.

Application

The ELK-AEXIN adds 16 hardwired inputs to the E27 Alarm Engine. It operates on the 4-wire data bus and features selectable End-of-Line (EOL) resistance values, a relay output, auxiliary DC power and battery connectors, and removable terminal blocks.

Specifications

DIP Switch Settings for EOL Resistance

Use this feature in retrofit installations to support different EOL resistors on the expander zones.

Installation Instructions

Before making any wiring connections, turn the E27 Master Power switch OFF.

Data Bus Wiring

CAT5 or CAT6 wire (4 pair, 8 conductor) is highly recommended for all data bus cables — the extra wires may be needed for data return paths where multiple home runs or devices are installed. Use 4 conductors to connect terminals BUS +12V, Data A, Data B, and Neg from the control to terminals +12V, A, B, and Neg on the AEXIN.

Refer to the E27 manual for termination guidelines when wiring systems with multiple home run connections. Minimum conductor size is 22 or 24 gauge. Maximum resistance per wire is 25 Ohms. Device placement beyond 1000 feet is not recommended.

Auxiliary Power

Note: If an auxiliary power source will be used, do not connect BUS +12V from the control to +12V on the AEXIN. Auxiliary power may be required to prevent exceeding the total current load rating of the E27 control, or when the AEXIN is remotely mounted.

1. Connect a 14VDC power source (ELK-P1417 or equivalent) to the 14VDC IN terminals. Observe correct polarity. DO NOT connect an AC transformer.
2. Connect the standby battery using the supplied battery leads: Red wire to positive, Black wire to negative.

Auxiliary Power Supply (Optional): Use ELK-P1417 or equivalent, 18 AWG minimum, observe polarity. Do NOT connect an AC transformer or a switched outlet.

Standby Battery (Optional): Use ELK-1280 (12V 8Ah) or ELK-12180 (12V 18Ah) sealed lead-acid battery, or equivalent. Replace the battery every 3–5 years.

Enrollment

Refer to the ElkConnect app instructions for details on enrolling the AEXIN into the E27 system.

Limited Warranty

The ELK-AEXIN Input Expander is warranted to be free from defects in materials and workmanship for a period of 2 years from date of manufacture. Elk makes no warranty, express or implied, including merchantability or fitness for a particular purpose, with regard to batteries used with wireless devices. Refer to Elk's website for the full warranty statement.

Regulatory

Complies with FCC Part 15, Class B digital device rules, and Innovation, Science and Economic Development Canada's license-exempt RSS standards (CAN ICES-3 (B)/NMB-3(B)). Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

Manufacturer: Elk Products, PO Box 100, 3266 US Hwy 70 West, Hildebran, NC 28637. Phone: 828-397-4200.