ProSoft Technology WRC-CANX User Manual

WRC-CANX

CAN Bus Extender

Series 4

User’s Manual

W

estern Reserve Controls, Inc.

Western Reserve Controls WRC-CANX-xx Series 4 PUB 14.1 User’s Manual

Although every effort has been made to insure the accuracy of this document, all information is subject to change without notice. WRC takes no liability for any errors in this document or for direct, indirect, incidental or consequential damage resulting from the use of this manual.

Document PUB 14.1

Rev 4.01

April 2011

Western Reserve Controls, Inc.

1485 Exeter Road

Akron OH 44306

330-733-6662 (Phone)

330-733-6663 (FAX)

sales@wrcakron.com (Email)

http://www.wrcakron.com (Web)

SmartMux-Lite, CAN-Bus Extender and WRC are trademarks of Western Reserve Controls, Inc. DeviceNet is a trademark of the Open DeviceNet Vendor Association, Inc. (“ODVA”). SDS is a trademark of the Honeywell, Inc. All other trademarks are property of their respective companies.

Western Reserve Controls WRC-CANX-xx Series 4

i

TABLE OF CONTENTS

1. OVERVIEW

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.......................

1

1.1. S

ERIES

4 S

PECIFIC FEATURES

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.......................

2

1.2. F

EATURES

................................

....................

2

1.3. B

ASIC OPERATION

................................

........

2

1.4. R

EFERENCE DOCUMENTS

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.............................

3

2. QUICK START

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..................

4

3. GENERAL SPECIFICATIONS

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........................

5

4. HARDWARE INSTALLATION AND CONFIGURATION

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.........

6

4.1. O

VERVIEW

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...................

6

4.2. DIP S

WITCH SETTINGS

................................

.

7

4.3. LED O

PERATION

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..........

8

4.4. P

OWER REQUIREMENTS

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9

4.5. N

ETWORK CABLING AND CONFIGURATION

................................

.

10

4.5.1. Cable Lengths

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.......

10

4.5.2. Network Termination

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.............................

10

4.5.3. DeviceNet Connection Wiring

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...............

12

4.5.4. SDS Bus Connection Wiring

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13

5. OPERATION

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15

5.1. A

PPLICATION NOTES

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..

15

5.1.1. CANX Theory of Operation

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15

5.1.2. Network Throughput Design Considerations

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16

5.1.3. Fixed Operation

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....

16

5.1.4. Autobaud Operation

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17

6. EXAMPLE CONFIGURATIONS

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18

7. ACCESSORIES AND OTHER CAN PRODUCTS

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21

8. TROUBLESHOOTING

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...

23

9. SUMMARY OF CHANGES TO SERIES 4 FROM REV 2 AND SERIES 3

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24

9.1. DIP S

WITCH BAUD RATE SETTINGS

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24

9.2. T

ERMINATING RESISTORS

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...........................

24

9.3. F

IELD PROGRAMMABLE UPDATES

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24

10. FREQUENTLY ASKED QUESTIONS

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25

WRC-CANX

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25

WRC-CANR

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25

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Western Reserve Controls WRC-CANX-xx Series 4

ii

LIST OF FIGURES

F

IGURE

1-1 WRC-CANX-DIN-DN S

ERIES

4

................................

................

1

F

IGURE

4-1

WRC-CANX-DIN S

ERIES

4 D

IMENSIONAL DRAWING

................................

..............

6

F

IGURE

4-2

WRC-CANX-NEM S

ERIES

3 D

IMENSIONAL DRAWING

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............

7

F

IGURE

4-3

WRC-CANX-DIN-DN D

EVICENET CABLE CONNECTOR

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........

12

F

IGURE

4-4

DEVICENET CABLE SPECIFICATIONS

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........

12

F

IGURE

4-5 WRC-CANX-NEM D

EVICENET CONNECTORS

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........................

13

F

IGURE

4-6 SDS M

INI CONNECTOR

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14

F

IGURE

6-1 L

INEAR TOPOLOGY EXAMPLE

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...................

18

F

IGURE

6-2 L

INEAR TOPOLOGY WITH DOUBLE DISTANCE EXAMPLE

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19

F

IGURE

6-3 L

INEAR TOPOLOGY WITH MULTIPLE EXTENDERS EXAMPLE

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......

19

F

IGURE

6-4 L

INEAR TOPOLOGY WITH MULTIPLE EXTENDED DROP LINES EXAMPLE

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...................

20

F

IGURE

6-5 S

TAR TOPOLOGY WITH MULTIPLE DROP LINES EXAMPLE

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.........

20

F

IGURE

10-1 S

AMPLE

WRC-CANX S

ETUP

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.................

27

LIST OF TABLES

T

ABLE

4-1 B

AUD RATE SETTINGS FOR SWITCHES

................................

..........

8

T

ABLE

4-2 M

ODULE STATUS

LED (

LABELED

MS)

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.........

9

T

ABLE

4-3 N

ETWORK STATUS

LED’S (

LABELED

NSA

AND

NSB)

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.................

9

T

ABLE

4-4 D

IAGNOSTIC STATUS

LED’S (

LABELED

DGN)

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.............................

9

T

ABLE

4-5 N

ETWORK MAXIMUM LENGTHS

- D

EVICENET

................................

...........................

10

T

ABLE

4-6 N

ETWORK MAXIMUM LENGTHS

- SDS

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.......

10

T

ABLE

4-7 T

ERMINATING RESISTORS

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...........................

11

T

ABLE

7-1 A

DDITIONAL

WRC D

EVICENET PRODUCTS

................................

...............................

22

T

ABLE

10-1 CANX

AND

CANR M

ODELS

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...................

25

PUB 14.1 User’s Manual

1. Overview

Figure 1-1 WRC-CANX-DIN-DN Series 4

The WRC-CANX Extenders is a family of products that extend the communications cable lengths for DeviceNet, SDS (Smart Distributed System), J1939, CANopen and other CAN, V2.0, Part A or Part B serial bus systems. By allowing the user to extend the bus length for any given speed, they assist the user in cost-effectively implementing I/O or other nodes on these buses at remote locations that would be more difficult or more expensive to do otherwise.

A WRC-CANX Extender (the family members collectively referred to here as CANX or Extender) can be connected in a bus trunk line or drop line and is transparent to the other nodes on the bus. It receives and actively re-transmits (store-and-forward) each message from either side of the network without interpreting the message or acting upon it.

Each product has two network interfaces with an electrical isolation path between the two. Power is delivered to the unit through the network connectors. For DeviceNet and SDS systems power is provided through the 5-conductor bus cable.

A CANX can be used for quite a number of helpful purposes, including

•

to extend the network beyond its absolute maximum length (e.g., 500 meters for

DeviceNet) at the slowest speed

•

to implement a longer network for a given baud rate (e.g., pushing a 500K baud network

beyond 100 m for DeviceNet)

•

to provide higher speed baud rates for a given network length

•

to extend the length of the drop cable (e.g., longer drops than 6 m for DeviceNet)

•

to provide 2600V electrical isolation between the 2 sub-nets

•

to create a unique network topology instead of a conventional bus structure, such as a

star configuration

Western Reserve Controls WRC-CANX-xx Series 4

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1.1. Series 4 Specific Features

The Series 4 CANX provides enhancements over previous versions. Enhancements include:

* CAN 2A and 2B support * New Switch settings allow selection for CANopen speeds up to 1 M Baud in addition to the

standard DeviceNet Baudrates * Increased message internal buffers – Automatic Memory Technology (AMT) operation * Shorter latency time compared to CANX series 3 * Improved Reverse voltage protection and Can data lines noise immunity * Jumper-selectable terminating resistors on-board the CANX

1.2. Features

The WRC-CANX has the following features:

Extends CAN-Bus cable lengths - trunk line or drop lines

Allows operation at higher speeds for specific distances

Expands the usable applications for CAN-Bus systems

Operates at 9.6K, 10K, 20K, 40K, 50K, 100K 125K, 250K, 500K, 800K and 1M baud

Operates up to 1M baud for other CAN protocols

No configurable parameters

Automatic baud rate selection

No address selection required

Isolates the two sides of the bus - 2500 volts

Logically transparent to the Master and Slave devices on the bus

DeviceNet; SDS; CANopen, J1939, CAN, V2.0, Part A and Part B compatible

Powered from the 24Vdc supplied by bus network or the user

Two mechanical packages:

DIN rail mount: WRC-CANX-DIN

Sealed NEMA-4X enclosure: WRC-CANX-NEM 5-pin pluggable connection for the DIN mount unit 5-pin round mini-style connection for the NEMA mount unit Standard CAN chips manage bus error detection Standard CAN chips handle message bus contention Less than 100 µsec latency 4 bi-color (red/green) status LED's CE Compliant for WRC-CANX-NEM-xx versions EN 55011 Class A EN 50082-2: 1994

1.3. Basic Operation

There are two bus connections for each CANX, referred to as Network A and Network B. The

CAN Bus is connected to each side of the CANX and each side receives its power and signals from the Bus on its respective side. See

Figure

1-2

for a typical application.

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Whenever a message is transmitted on the Bus to which CANX is connected, CANX receives the

message on the side where it was initiated and performs a store-and-forward of the message to the other side. It then transmits the message to the bus on the other side, following the defined bus arbitration rules. This action is performed for any valid CAN message independent of who generated it or to whom it is intended.

There is approximately a 75 µsec propagation delay of the message through the CANX.

The CANX is not addressed as a specific device on the Bus and cannot be interrogated by other

nodes. It is transparent to all other nodes on the bus.

Figure 1-2 Typical CANX network configuration

1.4. Reference Documents

The following documents are referenced in this User’s Manual

* ODVA DeviceNet Specification Volume I, Release 2.0 or CIP specification Volume 3

* Honeywell Micro Switch Specification GS 052 104, “SDS Smart Distributed System Physical

Layer Specification”, release date 12/8/1994

Network B

A B

PS PS

CAN-Bus

Master

T T T T

Network A

Terminating resistor requirements indicated by “T”

WRC-CANX

I/O Nodes

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Western Reserve Controls WRC-CANX-xx Series 4 PUB 14.1 User’s Manual

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2. Quick Start

To quickly and easily install your CAN-Bus Extender in your DeviceNet system, follow the instructions below. For more details, see Section 4.

To Install and Establish Communications

1. Remove the CAN-Bus Extender from the box and connect your CAN-Bus cable to the 5-pin plugs (supplied with CANX-DIN) or the mini-style connectors (user-supplied) according to wiring specifications for the CAN Bus you are using and described later in this manual.

2. Leave the DIP switches in the FF or all OPEN positions. The DIP switches are set to autobaud both A and B sides from the first valid CAN message on either side.

3. Using on-board jumpers W1 and W3, terminate each side of the CAN-Bus network, as appropriate. (This is especially critical at the higher baud rates.)

4. The CANX does not differentiate between A side and B side from a functional perspective. The CANX can be oriented with either side toward the Master.

5. Make sure that there is power on both network sides. (The CANX isolated power and signal.)

6. Plug the CANX into your network.

7. The CAN-Bus Extender will undergo its initialization sequence, flashing the LED’s. After approximately 5 seconds, the Module Status LED (labeled “MS”) will go on solid green and network LED’s (labeled “NSA” and “NSB”) will flash green.

8. Both Network A and B Status LED’s (NSA and NSB) will go on solid once a valid CAN message is received into either side of the Extender and the baudrate auto-detect has been successfully performed.

9. The CAN-Bus Extender is now operating on the network and is ready to repeat messages from either Network A or Network B.

Western Reserve Controls WRC-CANX-xx Series 4

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3. General Specifications

Product

: WRC-CANX-DIN and WRC-CANX-NEM CAN-Bus Extender, Series 4

Description

: Electrical extender to extend the permitted cable distances defined for CAN-

based network products

Device Type

: Communications Extender

Product Revision

: 4.1

DeviceNet Conformance

: Designed to conform to the ODVA DeviceNet Specification Version 2.0.

Baud rate

: 9.6K, 10K, 20K, 40K, 50K, 100K 125K, 250K, 500K, 800K and 1M baud fixed

or auto-detect baud rate on DeviceNet

Address selection

: Not applicable

Bus Connection

: WRC-CANX-DIN

Extender: 5-pin pluggable header (male pins)

Phoenix Contact MSTBA 2.5/5-G-5.08/AU

CAN-Bus Cable: 5-contact plug (female contacts)

Phoenix Contact MSTB 2.5/5-ST-5.08/AU (included)

WRC-CANX-NEM Extender: Woodhead # 51354, female sockets, female threads

Woodhead # 1R5006A17A120, male pins, male threads

CAN-Bus Cable: See accessories list

Status Indicators

: Module Status: green/red bi-color LED

Network A Status: green/red bi-color LED Network B Status: green/red bi-color LED Diagnostic Data: green/red bi-color LED

Voltage Isolation

: 2500 V

Maximum power

: Voltage: 11 - 25 Vdc

Current: Network A: 110 mA @ 11 Vdc - 60 mA @ 25 Vdc

Network B: 20 mA @ 11 Vdc - 10 mA @ 25 Vdc

Power: 1.5 W

Mounting

: WRC-CANX-DIN: DIN rail mount, EN 50022

WRC-CANX-NEM: Panel-mount, 4 screws

Size

: WRC-CANX-DIN WRC-CANX-NEM

Length: 4.32” (110 mm) 5.11” (130 mm) Depth: 1.79” (45,5 mm) 2.27” (57,7 mm) Height: 3.44” (87,4 mm) 3.70” (94,0 mm)

Operating Temp

: 0-70 ºC

Humidity

: 0-95% RH, non-condensing

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4. Hardware Installation and Configuration

4.1. Overview

A CAN-Bus Extender is a single device connecting to two parts (sub-network) of a single CANBus network. The CANX-DIN is to be mounted on an EN50022 DIN rail (available from WRC and WRC’s distributors as part number WRC 50022) in any orientation. The CANX-NEM is a NEMA-4X polycarbonate enclosure and is panel mounted.

Figure 4-1 WRC-CANX-DIN Series 4 Dimensional Drawing

--NET A- -NET B-1 2 3 4 5 6 7 8

OPEN

NSA

NSB

DGNMSNETWORK A

4.65” (118 mm)

1.79” ( 45,5 mm)

SW1

NETWORK B

W1

W3

PUB 14.1 User’s Manual