1.2 Mounting the Unit 

The unit is designed for panel mounting. The user should not be able to access parts of the unit other than the front panel. 

Mount the unit on a flat, vertical surface. The unit fits into an opening of 116x86 millimeters. Before mounting, remove the retaining steel spring and connectors from the unit, then pass the unit through the mounting opening. The unit will be maintained in its position by the steel spring. 

The output of the current transformers shall be 5 Amperes. The input current rating of the current transformers may be selected as needed (between 10/5 and 9000/5 amps). Current transformer outputs shall be connected by separate cable pairs from each transformer, to related inputs. Never use common terminals or grounding. The power rating of the transformer should be at least 5 VA. It is recommended to use 1% precision transformers. 

If analogue senders (e.g. temperature or oil pressure) are connected to the unit, it is not possible to use auxiliary displays, otherwise the unit may be destroyed. If temperature or oil pressure displays are already present on the generator control panel, do not connect the senders to the unit. The unit is factory programmed for VDO type senders. However different types of senders are selectable via programming menu. Please check the programming section. 

The programmable digital inputs are compatible with both ‘normally open’ and ‘normally closed’ contacts, switching either to BAT- or BAT+. 

The charge alternator connection terminal provides also the excitation current, thus it is not necessary to use an external charge lamp. 

This output provides energy to the generator contactor. If the generator phases do not have acceptable voltage or frequency values, the generator contactor will be de-energized. In order to provide extra security, the normally closed contact of the mains contactor should be serially connected to this output.  

This output provides energy to the mains contactor. If the mains phases do not have acceptable voltages, the mains contactor will be de-energized. In order to provide extra security, the normally closed contact of the generator contactor should be serially connected to this output. 

The positive terminal of the DC Supply shall be connected to this terminal. The unit operates on both 12V and 24V battery systems. 

This relay is used for fuel solenoid control. It is internally connected to terminal 16 for supplying the charge alternator’s excitation current. 

Connect the charge alternator’s D+ terminal to this terminal. This terminal will supply the excitation current and measure the voltage of the charge alternator.