ELK-AEXOU — Relay Output Expander Installation Instructions

Installation instructions for the ELK-AEXOU Relay Output Expander — adds 8 relay outputs to the ELK E27 Alarm Control Engine over the 4-wire data bus.

Application

The ELK-AEXOU adds 8 relay outputs to the E27 Alarm Control Engine. It operates on the 4-wire data bus and features LED indicators for each output, auxiliary DC power and battery connectors, and removable terminal blocks.

Specifications

• 8 SPDT Form "C" relay outputs
• Operates from the E27 RS-485 data bus
• Status LED with diagnostic display
• Relay contact ratings: 7 Amps @ 28 VDC, 10 Amps @ 125 VAC
• Operating power: 12 VDC
• Current draw: 35mA nominal, 330mA max
• Size: 6" x 3.25" x 1"

Features or specifications subject to change without notice.

Installation Instructions

Before making any wiring connections, TURN THE E27 MASTER POWER SWITCH OFF.

Data Bus

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 the BUS +12V, Data A, Data B, and Neg terminals from the control panel to the +12V, A, B, and Neg terminals on the AEXOU.

Refer to the E27 manual for guidelines on proper termination and wiring of 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 panel to +12V on the AEXOU. Auxiliary power may be required to avoid exceeding the E27 control's total current load rating, or when the AEXOU is remotely mounted.

1. Connect a 14VDC power source (ELK-P1417 or equivalent) to the 14VDC IN terminals. Observe correct polarity. DO NOT CONNECT AC TRANSFORMER!
2. Connect the standby battery using the supplied battery leads: red wire to positive, black wire to negative.

• Auxiliary power supply: use ELK-P1417 or equivalent; observe polarity; 18 AWG minimum. Do not connect an AC transformer or connect to a switched outlet.
• Standby battery (optional): use ELK-1280 (12V 8 Ah) or ELK-12180 (12V 18 Ah) or equivalent; replace every 3-5 years.

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

Wiring Reference

The unit provides 8 SPDT relay outputs (OUT 1–OUT 8), each with N/O, COM, and N/C terminals. Data bus terminals (+12V, A, B, Neg) connect at J1/J2 with a data bus termination jumper (JP1). Power terminals accept 14VDC IN and 12V OUT, plus BATT (battery) connections with polarity markings.

Warranty

The ELK-AEXOU Relay Output 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 / Compliance

This device complies with Part 15 of the FCC Rules (subject to the two standard conditions: no harmful interference caused, and must accept interference received). This equipment has been tested and found to comply with Class B digital device limits per Part 15 of the FCC Rules. Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment. Contains license-exempt transmitter(s)/receiver(s) complying with Innovation, Science and Economic Development Canada's licence-exempt RSS standards. CAN ICES-3 (B)/NMB-3(B).

Manufacturer

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