Meters and irradiance sensors
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Part of the AMMP Edge installation.
Carlo Gavazzi EM24 meter
Wire the meter for your model (65 A direct or 10 A CT-connected) following Carlo Gavazzi's installation sheet.
Connecting to the datalogger
Connect the meter's RS485 terminals to the datalogger:
| EM24 terminal | Datalogger |
|---|---|
| A− (41) | RS485 A |
| B+ (42) | RS485 B |
| GND (43) | GND |
Meter settings
Enter programming mode by pushing the joystick in for at least 3 seconds (the front knob must not be in the locked position). The default password is 0. Then set:
| Menu | Setting |
|---|---|
| 06 SYS | Your electrical system, for example 3P.n (3-phase with neutral) or 1P (single phase) |
| 07 Ut rAtio | VT ratio, if voltage transformers are used (for example 5 kV / 100 V = 50) |
| 08 Ct rAtio | CT ratio, if current transformers are used (for example 3000 A / 5 A = 600) |
| 13 AddrESS | 9 for a meter on the load side |
| 13 bAudrAtE | 9600 |
Choose 16 End to leave programming mode. For all other menus, see the EM24 instruction manual from Carlo Gavazzi.
Important
If the meter is installed anywhere other than the load side, for example on the grid connection or a generator input, contact support@ammp.io before configuring it.
IMT irradiance sensor
Mount the sensor on the roof or a similar spot with the same orientation as the panels, and where nothing casts a shadow on it.
Run 1.5 mm² 4-core flexible cable from the sensor to the router along the shortest path. Avoid joints; you'll need one extra conductor for the ground.
Connect:
Sensor wire Connect to Red V+ of the power converter Grey V− of the power converter Thick black GND of the Strato Pi Yellow RS485 A of the Strato Pi Blue RS485 B of the Strato Pi Run a local network scan to check the sensor is detected.
In the datalogger interface, use Custom actions to change the sensor's Modbus address from 1 to 2.