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PD 990 4-Wire P-NET conditoner

The PD 990 4-WIRE P-NET Conditioner unit is a multipurpose device that is used for:

Termination of a 4-WIRE P-NET bus
Connection of a traditional P-NET module to a 4-WIRE P-NET bus
Connection and termination of a traditional P-NET module to a 4-WIRE P-NET bus

PD 990 4-WIRE P-NET Conditioner

The PD 990 4-WIRE P-NET Conditioner is delivered as a moulded unit having 5 wires of 200 mm length.

PD 990 4-WIRE P-NET Conditioner label

Wiring of the PD 990 4-WIRE P-NET Conditioner

Depending on the required function of the P-NET conditioning unit, some of the wires may not be used.
The unused wires can be cut off. Please refer to the wiring principles below for an explanation of the different functions.

4-WIRE P-NET Termination

Traditional P-NET device connected to P-NET 4-WIRE bus

Traditional P-NET device connected to P-NET 4-WIRE bus with termination

4-WIRE P-NET termination principle

The PD 990 4-WIRE P-NET Conditioner is used for terminating 4-WIRE P-NET.

4-WIRE P-NET termination diagram:

Termination equals: 113Ω and applies a bias voltage of 0.7V at 5V