P-NET Installation:

P-NET can be installed using a number of different techniques and topologies. Select one of the illustrations below for further information.

P-NET Ring Topology:

P-NET Bus Topology:

P-NET Redundancy:

4-WIRE P-NET Topology:

Light-Link P-NET:

General P-NET Introduction

P-NET is an international fieldbus standard (IEC 61158 type 4). The physical layer of P-NET is based on EIA RS485.

P-NET using RS485 allows for two different installation techniques: ‘P-NET’ and ‘4-WIRE P-NET’ The same rules concerning cable lengths, number of nodes, communication speed etc, apply to both installation variants.

With 4-WIRE P-NET, both communication and power supply are included in the same bus cable.

Connecting P-NET modules in the ‘traditional’ way, establishes a communication link between a number of individual nodes, with each having its own power supply.

By using the appropriate adapters and the correct installation techniques, P-NET and 4-WIRE P-NET networks can be mixed within an installation and still maintain a fully transparent system.

P-NET modules which use the traditional method:

PD 340 Flow Transmitters

PD 3000 Family

PD 4000 Controller

PD 5000 Controller Family

PD 600 Family (M36), when using BM 002 or BM 010 base modules

4-WIRE P-NET modules:

PD 681

PD 600 Family (M36), when using BM 012 base modules