Aurora GRT8-M1 Timer Relay Functions, Settings, and Manual

Preface: This article covers some of the technical details of the GRT8-M1 relay used in the Aurora series Lasers

GRT8-M1 located in the top of the Aurora, next to the Main Breaker

Part Number Explained

We use the GRT8-M1 with is a SPDT Timer off relay with 120v Control Voltage so the full part number would be GRT8-M1/W240

Red Knob Settings

Knob 1: 1s
Knob 2: 50pct

Knob 3: E Mode

Wiring from Aurora Schematics

Aurora Series Wiring Diagram v8.4

Tracing Wires Back to Sources or Devices

Notes About Relay Function

Reference Links

• https://www.geya.net/product/multifunction-time-relay-grt8-m1/
• https://www.geya.net/wp-content/uploads/2021/05/GRT8-M-Instruction-Manual.pdf