Agrowtek RD8i, Instruction Manual, Page: 1 / 14

© Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™
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© Agrowtek Inc. | www.agrowtek.com | Technology to Help You Grow™
Technology to Help You Grow
AGROWtEK
Digital Intelligent Dry-Contact Relay
Contents
Introduction 2
How “Dry-Contact” Relays Work 2
What Relays Control 2
Manual Toggle Switches 3
Installation Instructions 4
Installing the RD8i Relay 4
DC Power Connections 5
Dry Contact Terminals 6
Example Connections, General 7
Example Connections, HVAC 8
Example Connections, Anden Dehu 9
Connection to GrowControl™ GCX 10
GrowNET™ Hubs 10
Connection to Intelligent Sensor 11
Cross-Over Cable 11
Specifications
Input Power 4 W @ 12-24Vdc
Class II / Limited Energy Power Supply
Max Switching Current 10A per point @ 120Vac ~
5A per point @ 240Vac ~
2A per point @ 24Vdc
Max Switching Voltage 120 Vac ~
HP Rating 1/2HP (4FLA @ 240Vac ~)
1/2HP (8FLA @ 120Vac ~)
Independent Contacts 8x Normally Open
Status Indicators Red LEDs
Enclosure Knock-Outs (2) dia. 7/8”
Enclosure Rating TYPE 12K NEMA
Minimum Cycle Time 1 second
Interface GrowNET™, MODBUS
Relay Ratings 100,000 cycles
Relay Cycle Counters Up to 4 billion cycles per relay
Connection to USB AgrowLINK 11
Connection to MODBUS RTU 12
Serial Speed & Format 12
Supported Commands 13
Register Types 13
MODBUS Coil Registers 13
MODBUS Holding Registers 13
Technical Information 14
Troublshooting 14
Maintenance & Service 14
Storage and Disposal 14
Warranty 14
INSTRUCTION MANUAL
RD8i, RD8i+
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