Key Features

• Increases the number of available relays
• User selectable gas alarm activation level for each relay (set at the controller)
• User selectable “Failsafe” and latching operation (set at the controller)
• ON/OFF Delay configurations (set at the controller)
• User configurable to revert to a default state if connection is lost with the controller (set at the controller)
• Modbus® RS-485 RTU communication
• Standard water / dust tight, corrosion resistant enclosure

Specifications

Mechanical

Enclosure

ABS / Polycarbonate, corrosion resistant

Copper coated interior to reduce RF interference

Weight

RLY-4: 1.08 kg / 2.4 lbs

RLY-8: 1.24 kg / 2.75 lbs

Size

254 x 218 x 109 mm / 10.0 x 8.6 x 4.3 inches

Input/Output

Relay

RLY-4: 4 SPDT relays, rated 5 amps @ 240 VAC

RLY-8: 8 SPDT relays, rated 5 amps @ 240 VAC

Communication

Modbus® RS-485 RTU

Electrical

Power Requirement

24 VDC, 3W, Class 2 (24 VDC supplied by the Controller)

Wiring

4-conductor shielded minimum 18 AWG stranded within conduit

Fuses

Thermal, resetting

Environmental

Operating Temperature

-20°C to 40°C (-4°F to 104°F)

Operating Humidity

15 - 90% RH non-condensing

Certifications

Conforms to:

CSA-C22.2 No. 205-12, UL508 (Edition 17):2007

EMC Directive 2004/108/EC, EN 50270:2006, Type 1, EN61010

FCC. This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

RoHS compliant circuit boards