Overview
Follow the steps in this article to wire one or more serial devices to an EG4xxx model eGauge meter using the USB485 serial converter.
Prerequisites
- Ensure proper wiring between serial devices. Only connect data signals, and signal ground (not earth ground).
- Multiple serial devices on the same chain should be configured with unique Modbus IDs and consistent serial settings.
- After connection, software configuration is required. A valid login to the eGauge meter interfaces is needed to make changes to device settings.
Instructions
Step 1: Wire the serial line to the D+, D-, and signal ground. Use twisted pair wire for D+ and D- connections.
Step 2: Turn the termination DIP switch to ON if it is the last connection on the serial line. Termination should be OFF if it is daisy chained in-between devices.
Step 3: Connect the Mini USB cable to the EG4xxx USB1 or USB2 port. Take note of which port is used.
Example Wiring Diagram
Multiple serial device can be daisy chained on the same line as shown in the diagram below, if needed:
Software configuration
- If exporting eGauge data via Modbus RTU to another system, see the Modbus output communication article.
- If importing data from a remote Modbus RTU device to the eGauge, see the Modbus input article.