DC Monitor

Bullet Power
dcm precision

25 amps at 1000 volts can be measured at each input. The integrated busbar provides the total power on the output terminal to transfer to the inverter. Size and type of the output terminal is adapted to the overall performance.

Bullet Precision
produ thumb 2

Highest accuracy is the basis for effective fault analysis and an accurate monitoring system. DC-Monitor measures the DC voltage with a deviation of at most 0.1% and the currents with a deviation of at most 0.5%.

Bullet Dynamic
dcm dynamic

DC Monitor is very flexible and scalable. The combinable devices ar available with 4, 8, 12, 16, 20, 24, 28 and 32 inputs. The Modbus RTU interface provides the measured data. The protocol description is available in the download area.

Busbar and DC meter for precise monitoring and measurement of current, voltage and power in generator connection boxes of solar parks and PV systems


Measurements on site

Assembly takes place the stringbox by plugging on a 35mm DIN hat rail. The DC string cables are taken up by maintenance-free spring terminals.
The internal controller of the DC-monitor measures current and voltage 80 times per second measures and calculates the DC power out of that.

Environmental Data

In addition to current, voltage and power DC-Monitor monitors its internal device temperature and can capture an external temperature sensor. The generator connection box's internal temperature or the temperature of the PV modules connected so can be evaluated synchronously with the performance data.
At two potential-free inputs, for example the surge protector, door contact or the condition of the fuses can be monitored as well.


DC Monitor provides all measured and calculated values ​​at its built-in Modbus RTU Slave interface. With a suitable Modbus master and the support for the DC Monitor protocol, the measurement data can be easily integrated into applications and systems. The protocol description can be downloaded from the download area.


You can reach us at:

Common-Link AG
Koellestrasse 30b
76189 Karlsruhe, Germany
T: +49 (0)721 / 81968-300
F: +49 (0)721 / 81968-400
info [at] common-link.com