Solar 4-wire sensor modification

What is a 4-wire sensor transmitter?

Locally powered 4-wire sensor transmitters are popular in applications where the wires must run long distances and the sensor consumes >4mA, preventing the use of a 2-wire transmitter. A common example is electromagnetic flow metering. Figure 1: Output-isolated 4-wire sensor transmitter with local power supply

How do I connect a solar meter to an inverter?

The meter is connected to an RS485 port of one of the inverters. If the inverter has a second RS485 port, use this port to connect between the inverters. If the inverter has only one RS485 port, use an RS485 Plug-In (available from SolarEdge) or ZigBee communication between the inverters.

What topology can be used for a 4-wire sensor transmitter?

Therefore, you can use a simple current-sink topology like the one shown in Figure 2. You could also use a current-source topology, but that would require a two-stage design similar to those found in 3-wire transmitters. Figure 2: 4-wire sensor transmitter output stage design

How do I install a solar sensor?

Install under a cover to protect the sensor from direct exposure to sunlight, precipitation and meltwater. Glue the sensor element (aluminum block) directly to the module back sheet. The surface must be dry, clean and degreased before affixing the element to the surface.

How do I connect my SolarEdge protection device?

The ground connection should be made using a heavy gauge wire and kept as short as possible. If the cable between the SolarEdge device and the protection device must be longer than 1m/3.3 ft., a copper strap or a braided cable intended for grounding purposes must be used for the protection device to be effective.

How do environmental sensors work?

Environmental sensors are used to monitor a site’s irradiance, temperature and wind conditions and calculate performance ratio (PR). Sensors connect to the SolarEdge Commercial Gateway and the measurements are displayed in the SolarEdge monitoring server. Up to three sensors can be connected to a single Commercial Gateway.