> For the complete documentation index, see [llms.txt](https://docs.smart-stuff.nl/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.smart-stuff.nl/p1-modbus-dongle/hardware-variants.md).

# HARDWARE VARIANTS

- [Hardware variants](https://docs.smart-stuff.nl/p1-modbus-dongle/hardware-variants/hardware-variants.md): Connections, power and installation information for each Smart Meter Modbus Adapter.
- [D1MC](https://docs.smart-stuff.nl/p1-modbus-dongle/hardware-variants/hardware-variants/d1mc.md): Hardware, connections, power and installation for the D1MC DIN-rail Smart Meter Adapter.
- [P1 Modbus Pro (NRGD)](https://docs.smart-stuff.nl/p1-modbus-dongle/hardware-variants/hardware-variants/p1-modbus-pro.md): Hardware, connections, power and installation for P1 Modbus Pro (NRGD).
- [Installation](https://docs.smart-stuff.nl/p1-modbus-dongle/hardware-variants/installation.md): Select the installation instructions for your Smart Meter Modbus Adapter.