Harsen GU621A Generator controller 
GU621A is a new generation Automatic Mains (Utility) Failure module for single Genset, which adopts bran-new outline configuration, focus on the requirements of customers, and perfectly improves the
performance of controller. It fully meets the auto control requirements of different kinds of Genset for user or special assembly factory. The module also monitors and protects the engine, indicating operational status, fault conditions and metering on the front panel LCD and LED’s.
1. True RMS measure of voltage and current.
2. Multi-Language menu.
3. 128 x 64 pixel LCD display.
4. 4 analog inputs for kinds of optional sensors that can be used for measuring oil pressure, coolant temperature, fuel level and so on; parameters can be configured by user.
5. More outputs of configurable auxiliary control relays.
6. More configurable isolated digital inputs.
7. Buttons on control panel are used for selecting control modes, starting and stopping the operating procedure, displaying data and modifying the parameters. LED indicators are used for indicating
the operation mode of controller and the running status of Genset, and LCD displays each measuring parameter and status.
8. Flexible equipped with RS485, RS232 and USB, realizing remote monitor; or communicated with PC, fully realizing functions of remote signaling, telemetering and remote control, can read and set
the running parameters of controller.
9. With GPRS-DTU or Ethernet-DTU for remote communication instead of RS485, RS232, or USB port for remote communication.
10. Optional CANbus, read and control the parameters for ECU engine.
11. All connections of the controller are by secure plug and socket, for ease and convenience to connect, move, maintain and replace the device.
12. Optional ultra low temperature function, the ambient temperature is from -40 °C to 70 °C.
performance of controller. It fully meets the auto control requirements of different kinds of Genset for user or special assembly factory. The module also monitors and protects the engine, indicating operational status, fault conditions and metering on the front panel LCD and LED’s.
1. True RMS measure of voltage and current.
2. Multi-Language menu.
3. 128 x 64 pixel LCD display.
4. 4 analog inputs for kinds of optional sensors that can be used for measuring oil pressure, coolant temperature, fuel level and so on; parameters can be configured by user.
5. More outputs of configurable auxiliary control relays.
6. More configurable isolated digital inputs.
7. Buttons on control panel are used for selecting control modes, starting and stopping the operating procedure, displaying data and modifying the parameters. LED indicators are used for indicating
the operation mode of controller and the running status of Genset, and LCD displays each measuring parameter and status.
8. Flexible equipped with RS485, RS232 and USB, realizing remote monitor; or communicated with PC, fully realizing functions of remote signaling, telemetering and remote control, can read and set
the running parameters of controller.
9. With GPRS-DTU or Ethernet-DTU for remote communication instead of RS485, RS232, or USB port for remote communication.
10. Optional CANbus, read and control the parameters for ECU engine.
11. All connections of the controller are by secure plug and socket, for ease and convenience to connect, move, maintain and replace the device.
12. Optional ultra low temperature function, the ambient temperature is from -40 °C to 70 °C.