This document discusses PROFIBUS DP and PROFIBUS PA network design. It notes that PROFINET will replace PROFIBUS DP for new projects, while PROFIBUS PA will continue to grow in process industries due to its strengths like bus powering of devices and use in hazardous areas. The document provides guidelines for engineering PROFIBUS networks, including segmentation, components, redundancy solutions, and using design tools and documents for segment calculations and drawings. It also stresses the importance of considering asset management early in network design.

1. Chris McComb
General Manager
PROFIBUS DP/PA network design

2. 2PROFIBUS UK 2Chris McComb iTech © 2017
PROFINET & PROFIBUS DP with Profibus PA
Coupler / Link
PROFIBUS-DP
PROFIBUS PA
Proxy
PROFINET
PROFIBUS PA
In the long view PROFIBUS DP will be replaced by PROFINET in new projects
PROFINET will become the backbone of PROFIBUS PA
PROFIBUS PA will grow due to its unique strengths in process industries
bus powering of devices
distance – 1900m safe area
designed for use in explosion/hazardous areas - easy application
PA Profile for easy life-cycle management
Today: Tomorrow:

3. 3PROFIBUS UK
Project delivery process
Operations
Maintenance
Procurement
Logistic
Installation
Basic
Engineering
Detailed
Engineering
Commissioning
OPEXCAPEX
Architecture &
Network Design
Network
Maintenance
Design Review
Integration
& Commissioning
Installation, Test
& Verification
Asset Information Management
Documents
On-Site Services
Engineering & Design Services
© 2017Chris McComb iTech

4. 4PROFIBUS UK 4Chris McComb iTech © 2017
Engineering principles and guidelines
Design documents
Installation guidelines
Commissioning documents
Available on Profibus.com
Some freely available
Some require membership
Documents also available
from some manufacturers
Certified training is available

5. 5PROFIBUS UK 5Chris McComb iTech © 2017
Engineering principles and guidelines

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Example - engineering principles and guidelines
Profibus DP
RS 485
Profibus PA
MBP Max. 1900 m
UBUS = 24 V
I BUS = < 400 mA
Profibus DP
RS 485
Profibus PA
MBP-IS Max. 1000 m
UBUS = 13,5 V
I BUS = < 110 mA
for ia / ib IIC
© 2017Chris McComb iTech

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Example - engineering principles and guidelines
T
Profibus PA
Profibus DP (RS 485)
1-12 13-14 15-18 19-24 25-32
120 m 90 m 60 m 30 m 1 m
Networks with spur lines
Trunk line
Spur
Max. spur length (each)
No. of nodes
© 2017Chris McComb iTech

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Network design – system architecture
Physical locations
Location of local panels
Location of each plant device
Single level or on different elevations?
Can devices be grouped?
Cable routing and containment
Ease of commissioning & maintenance
Number of devices in a cell(Each square is 6m x 6m)
Basic plot plan
Segmentation
Chris McComb iTech

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Networking components
T
T
T
T
DP Hubs, repeaters connectors DP / PA gateways, couplers PA junction boxes, segment protectors, cable sets
Chris McComb iTech

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Redundancy solutions for PROFIBUS
Solutions for redundant PROFIBUS cabling are available from
many manufacturers:
Siemens Y-Link
PROCENTEC ProfiHubs
ABB Redundancy
Link Module
Moor-Hawke
Redundancy for PA
COMbricks modules

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Slave with
integrated
redundancy
Y
Slave 4
Slave
3A
Slave
3B
Mechanically combined
outputs
Redundant
slaves
Wired OR
outputs
Slave
2A
Slave
2B
Y
Redundant
masters
Master
B
Y
Properly designed redundant
solutions can provide robustness
against a wide selection of faults
and conditions.
Master
A
Redundant cables
PSU A
PSU B
Redundant
power
supplies
Y
Slave
1
Redundant
links or hubs
Y
Redundancy solutions for PROFIBUS

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Segment calculations and design tools
Chris McComb iTech

13. 13PROFIBUS UK 13© 2017
Segment design drawings
Chris McComb iTech

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Asset management network
Consider asset management early
How do I access my devices?
What’s the impact on the networks?
Used during project commissioning
Simplifies maintenance procedures
Chris McComb iTech

15. 15PROFIBUS UK 15© 2017
Contact details
Chris McComb iTech
iTech (Scotland) Ltd
Chris McComb
General Manager
Unit 1, 8 Dukes Road
Troon, KA10 6QR
T: 01292 311613
M: 07872 376286
E: chris.mccomb@itech-troon.co.uk
W: www.itech-troon.co.uk