© 2006 Swagelok Company.

IS CAN Bus – CiA DSP 103 V 1.0

Low Cost, Intrinsically Safe Transducer Bus Enabling NeSSI Gen II

Rick Ales Swagelok Company

© 2006 Swagelok Company. Swagelok confidential. For internal use only.

MPC Gen II Architecture

V TPA

NeSSI Device Sample System

FlowSensors

Sensor Analyzer Manager SAM

IS NeSSI Bus

Remote Operator Station

Ethernet

Analyzer

Hazardous Area Class 1 Div 1 (Zone 1)

10 Meters

© 2006 Swagelok Company. Swagelok confidential. For internal use only.

IS and the Ignition Curve

Voltage = Frequency-1 * Distance

24V = Frequency-1 * 2000M

9.5V = Frequency-1 * 10M

© 2006 Swagelok Company. Swagelok confidential. For internal use only.

Communications Model

Virtual Message Path

Actual M

essage P

ath

© 2006 Swagelok Company. Swagelok confidential. For internal use only.

IS CAN Major Parameters

• The CAN physical layer ISO11898-1,2 & CiA301• Co-cabled 10m max Single power source only • 3.3V Driver 1/3 the Power • Power bus specification P+F RSD2-PSD-EX4.43• M12 or M8 Connectors 2 Power and 2 CAN wires• Area Classification Class 1 Div 1 (Zone 1)

Entity Parameters

VOC (V) ISC (A) Groups CO (uF) LO (uH)

   A, B (IIC) (Acetylene & Hydrogen) 0.8 10

9.5Vdc 1.0 A C (IIB) (ethylene) 2.4 40

    D (IIA) (propane) 6.4 80

© 2006 Swagelok Company. Swagelok confidential. For internal use only.

IS CAN Physical Layer Topology

4 Circuits 8.5 Watts each

© 2006 Swagelok Company. Swagelok confidential. For internal use only.

NeSSI Gen II Architecture

© 2006 Swagelok Company. Swagelok confidential. For internal use only.

Gen II NeSSI Bus Open Standard

www.can-cia.org

CiA 103 DSP V1.0

April 2007

© 2006 Swagelok Company. Swagelok confidential. For internal use only.

Ex Harmonization

Div 2 Zone 2

Div 1 Zone 1

Zone 0UL 913 specifies all Div 1Equipment meet Zone 0Requirements in 2012

Safe

© 2006 Swagelok Company. Swagelok confidential. For internal use only.

Discussion?