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13. Installation and wiring
To guarantee a perfect operation of the controller, the following (external) meas-
ures have to be taken additionally:
Place of installation:
Don't install the controller near to sources of interference generating strong inductive or
capacitive interferences or strong electrostatic fields.
Install the external power supply directly beside the controller to avoid long low voltage
wires.
Power supply:
Connect the external power supply to a phase of 230 VAC or 115 VAC, which is not used
for engines. If not possible use a galvanic separation over an additional transformer.
Wire installation:
Install all wires for low voltages and encoders always separately from power wires (230
VAC/400 VAC). Avoid to install these wires close to any contactor or contactor wires.
Shielding:
All external signal wires have to be installed shielded:
1. Rotary encoder wires
2. Wires for all other input signals
3. Wires for all output signals
4. Wires from the power supply to the controller
All shields have to be connected centrally low ohm to
PE
(earth potential), connect only one-sided at the P8822-Controller.
IMPORTANT!
1. Don't connect the P8822’s GND to
PE
(earth potential)
2. Don’t connect the shielding on both sides to
PE
(earth potential)
3. If the protective ground potential is heavily "contaminated" by interference voltages, try
to connect the shielding to the GND potential instead of
PE
(earth potential)
Fault clearance:
If there occurs interferences in spite of applying all above mentioned
measures proceed as follows:
1. Add RC elements over contactor reels of AC contactors (for example 0,1 µF/100
Ω
).
2. Add recovery diodes over DC inductances
3. Add RC elements over each engine phase (in connector box of the engine)
4. Install a power filter before the external power supply
Attention!
To ensure a perfect function of the controller P8822 the following
installation guide-lines must be strictly observed and followed. Otherwise the
guarantee expires and
ELGO Electric GmbH
takes no liability and guarantee
for malfunctions or damages caused e.g. by incorrect installed wires or other
external sources of error or interference, which are exactly explained below.
Please read the instructions carefully, before start up the unit.
