HMA Overview
The definitive solution for automatic switching between power sources.
HMA is an electronic device for switching between power sources that can be combined with any MultiPower “HMA ready” device.
Automatic power source management
HMA, combined with any MultiPower “HMA ready” device, switches between AC power (mains or generator) and DC power (photovoltaic panels) completely automatically, based on the programmed logic.
Mechanical disconnection of the two power supplies
Two interlocked contactors guarantee the uniqueness of the power supply and ensure separation in order to ensure maximum electrical safety.
Control of auxiliary generator
When the AC power is provided by a generator, HMA is able to start or stop it according to need. It also monitors any signs of failure or running out of fuel.
HMA Technical Specifications
| Model | VDC | VAC | I max | Compatibility |
| HMA 218 | 90 – 400 | 1 x 90 – 265 | 18 A | 4HS SUND MIDA Solar 203-207 MP VS 218 MP |
| HMA 430 | 190 – 850 | 3 x 190 – 520 | 30 A | VS 212 MP VS 409-430 MP |
| HMA 485 | 190 – 850 | 3 x 190 – 520 | 85 A | VS 438-485 MP |
General specifications
| Rated frequency | 50 – 60 Hz (+/- 2%) |
| Ambient temperature | -10 – 50°C (-14 – 122°F) |
| Max. altitude at rated current | 1000 m |
| Protection degree | IP54 (NEMA 12) |
| Settable digital outputs N.O. or N.C. | 1. Motor run signal 2. Alarm signal |
| Analog inputs (10 or 15 VDC) | 1. 4 – 20 mA 2. 4 – 20 mA 3. 4 – 20 mA or 0 – 10 VDC 4. 4 – 20 mA or 0 – 10 VDC |
| Digital inputs | 4 digital inputs, configurable N.O. or N.C. |
| Communication | RS485 MODBUS RTU, Bluetooth® SMART* (4.0) |
