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2.5.2
Wiring guidelines - best practice for grounding
It is important to follow these wiring guidelines to get:
• Reliable readings from the sensors.
• Precise measurement of AC voltage and current.
• Best protection from lightning and other earth faults.
Example: Typical grounding setup
1. The sensor common point (terminal 41) must be connected to an electrical sound point on the engine. The potential
difference to terminal 1 (BAT-) must be less than ± 0.5 V.
2. Do not connect the starter motor relay at the stop solenoid directly to the output terminals on the controller. You can
configure any of the outputs as run coil and crank.
3. Connect the shield to the engine ECU as described by the engine manufacturer.
4. Current transformers.
5. Power supply DC- (terminal 1) must be connected to BAT- (in this example, the engine).
6. Connect the digital inputs to ground to active the negative switching.
7. The protected earth for the generator output.
User manual 4189341340A EN
Page 12 of 76
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