WRC-CANX CAN Bus Extender Series 3 User’s Manual W estern Reserve Controls, Inc.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 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 14.0 Rev 3.02 April 2003 Copyright © 1997 – 2003 WRC Western Reserve Controls, Inc.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual TABLE OF CONTENTS 1. 1.1. 1.2. 1.3. 1.4. 1.5. OVERVIEW ............................................................................................................................................................................ 1 SERIES 3 SPECIFIC FEATURES ..........................................................................................................................................2 FEATURES..................................
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual LIST OF FIGURES FIGURE 1-1 WRC-CANX-DIN-DN SERIES 3..................................................................................................................................1 FIGURE 1-2 WRC-CANX-NEM-DN SERIES 3................................................................................................................................2 FIGURE 1-3 TYPICAL CANX NETWORK CONFIGURATION ...............................................
1. Overview The WRC-CANX Extenders is a family of products that extend the communications cable lengths for DeviceNet, SDS (Smart Distributed System), 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 costeffectively implementing I/O or other nodes on these buses at remote locations that would be more difficult or more expensive to do otherwise.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual Figure 1-2 WRC-CANX-NEM-DN Series 3 1.1. Series 3 Specific Features The Series 3 products provide enhancements over previous versions. Enhancements include: • • • • CAN 2A and 2B support Up to 1M Baud CAN bus operation available Jumper-selectable terminating resistors on-board the CANX Increased message internal buffers 1.2.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual • Less than 500 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 1-3 for a typical application.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual Table 1-1 CANX Ordering Options Bus Network DIN Mount NEMA Enclosure DeviceNet WRC-CANX-DIN-DN Series 3 WRC-CANX-NEM-DN Series 3 WRC-CANX-NEM-AU Series 3 SDS WRC-CANX-DIN-SD Series 3 WRC-CANX-NEM-SD Series 3 Other CAN Bus WRC-CANX-DIN-CU Series 3 WRC-CANX-NEM-CU Series 3 1.5. Reference Documents The following documents are referenced in this User’s Manual • ODVA DeviceNet Specification Volume I, Release 2.
Western Reserve Controls PUB 14.0 2. WRC-CANX-xx Series 3 User’s Manual Using This Manual This manual serves to help the user to understand the capabilities of the CAN-Bus Extender product family and how to install and configure an I/O subsystem using these products. Section 3 describes how to quickly connect your WRC-CANX and get it up and running on the DeviceNet, SDS or other CAN-Bus link. Section 4 provides the technical specifications for the products.
Western Reserve Controls PUB 14.0 3. WRC-CANX-xx Series 3 User’s Manual Quick Start To quickly and easily install your CAN-Bus Extender in your DeviceNet system, follow the instructions below. For more details, see Section 5. To Install and Establish Communications 1.
Western Reserve Controls PUB 14.0 4. WRC-CANX-xx Series 3 User’s Manual General Specifications Product: WRC-CANX-DIN and WRC-CANX-NEM CAN-Bus Extender, Series 3 Description: Electrical extender to extend the permitted cable distances defined for CANbased network products Device Type: Communications Extender Product Revision: 3.xx DeviceNet Conformance: Designed to conform to the ODVA DeviceNet Specification Version 2.0.
Western Reserve Controls PUB 14.0 5. WRC-CANX-xx Series 3 User’s Manual Hardware Installation and Configuration 5.1. Overview A CAN-Bus Extender is a single device connecting to two parts (sub-network) of a single CAN-Bus 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. NSA W1 1.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual NSA DeviceNet Male, Mini W1 DGN MS DeviceNet Female, Mini NETWORK A 2.27” ( 57,7 mm) --NET A- --NET B-1 2 3 4 5 6 7 8 SW1 OPEN W2 NSB NETWORK B 5.11” (130 mm) Figure 5-2 WRC-CANX-NEM Series 3 Dimensional Drawing 5.2. DIP Switch Settings The WRC-CANX-XX has an 8-pole DIP switch. • • Switch positions 1-4 are used to set the Network A baud rate. Switch positions 5-8 are used to set the Network B baud rate.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual 5.3. LED Operation The WRC-CANX-XX Multiplexer has four (4) LED’s that provide visual status information to the user about the product and the DeviceNet network. See Figure 5-1, Table 5-2, Table 5-3 and Table 5-4. Table 5-2 Module Status LED (labeled MS) LED State Module Status Meaning OFF No Power There is no power through DeviceNet. Device Operational WRC-CANX is operating normally.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual Table 5-4 Diagnostic Status LED’s (labeled DGN) LED State Module Status Meaning OFF Normal operation No Power, or Normal Operation with power applied. 5.4. Power Requirements The WRC-CANX-XX CAN-Bus Extender subsystem is powered from the 11-25 Vdc provided by the DeviceNet network. The WRC-CANX consumes 70 mA of current at 24 Vdc, or 1.8 Watts, typical. See Section 4.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual Table 5-6 Network Maximum Lengths - SDS Baud Rate 125 Kbits/s 250 Kbits/s 500 Kbits/s 1 Mbits/s Trunk Line Length (maximum) Meters Feet 457.2 1500 182.8 600 91.4 300 22.8 75 Drop Length (maximum) Meters Feet 3.6 12 1.8 6 0.9 3 0.3 1 No. Nodes 64 64 64 32 SDS has a limit of 32 nodes per network for any baud rate. The CANX does not count as an addressed device. 5.5.2.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual Important: Per the DeviceNet and SDS specs -- do not terminate devices on drop lines. An appropriate terminating resistor kit, WRC part number RM121DN, which satisfies both DeviceNet and SDS specs, is included with your Extender. Note: The WRC-CANX Series 3 family is configured at the factory with 2 internal terminating resistors on each network – one for Network A and one for Network B – using jumpers W1 and W2.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual 5.5.3. DeviceNet Connection Wiring The supplied 5-pin CAN-Bus connection plug accepts cable sizes from 12 AWG - 24 AWG. The maximum wire size (12 AWG) has an area of 6530 circular mils and the smallest (24 AWG) has an area of 3265 circular mils.
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Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual 5.5.4. SDS Bus Connection Wiring The supplied 5-pin CAN-Bus connection plug accepts cable sizes from 12 AWG - 24 AWG. The maximum wire size (12 AWG) has an area of 6530 circular mils and the smallest (24 AWG) has an area of 3265 circular mils.
Western Reserve Controls PUB 14.0 6. WRC-CANX-xx Series 3 User’s Manual Operation The CANX accepts and stores messages received at either network connection and actively retransmits the messages to the other sub-net while providing 2500V isolation between the two sections of the network. The two bus connections for each CANX are referred to as Sub-Network A and Sub-Network B, and the two sub-nets are one logical network with isolation between them.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual 6.1.1. CANX Theory of Operation As described the CANX performs a store-and-forward operation on each message received. The operation is described in this section. The CANX will verify and accept (consume) on either network side any and all valid CAN messages. The message will be momentarily stored internally and the CANX will immediately attempt to re-send (produce) the message on the other side bus.
Western Reserve Controls PUB 14.0 WRC-CANX-xx Series 3 User’s Manual 6.1.4. Autobaud Operation Autobaud is the method by which a device automatically determines the baud rate on the DeviceNet network and sets it’s internal baud rate to match without the need for switches or software configuration. The CANX supports autobaud. Autobaud operation has the advantage of allowing a system implementer or designer to ignore the operating baud rate when installing the CANX.
Western Reserve Controls PUB 14.0 7. WRC-CANX-xx Series 3 User’s Manual Example Configurations Examples of valid configurations are shown in the following figures. The first example shown demonstrates a standard linear bus structure for comparison.
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Western Reserve Controls PUB 14.0 8. WRC-CANX-xx Series 3 User’s Manual Accessories and Other CAN Products The following components can be used with a WRC-CANX CAN-Bus Extender for replacements or spare parts. Part WRC P/N Equivalent Mfr. Part Number • CANX-DIN Link Connector and Terminator Resistor CANX-DN-CK Phoenix Contact MSTB2.5/5-ST-5.08/AU • n/a Various manufacturers’ Mini-Style Connector CANX-NEM Cable Examples: Cable assy. w/ female threads, fem.
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Western Reserve Controls PUB 14.0 9. WRC-CANX-xx Series 3 User’s Manual Troubleshooting This section identifies some of the common problem observed when commissioning or operating a CANX Extender. Problem: DeviceNet devices will not communicate on the network Module Status LED is solid Green Network Status LEDs are flashing Green at ½ second intervals Meaning No transmissions have been received by the CANX for 0.5 seconds. Possible Solutions: 1. Network cables are broken or disconnected. 2.
Western Reserve Controls PUB 14.0 4. WRC-CANX-xx Series 3 User’s Manual Recalculate the network traffic and bandwidth without the CANX. 10. Summary of Changes to Series 3 from Rev 2 To facilitate implementation of the new Series 3 CANX products for customers that are currently users of the CANX Revision 2.xx products, this section summarizes the product changes from Rev 2 to Series 3. 10.1. DIP Switch Baud Rate Settings Several new options exist for setting the baud rate on the CANX Series 3.
