WRC-CANX CAN Bus Extender Series 4 User’s Manual Western Reserve Controls, Inc.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 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 Copyright © 1997 – 2011 WRC Western Reserve Controls, Inc.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual TABLE OF CONTENTS 1. OVERVIEW ....................................................................................................................................................... 1 SERIES 4 SPECIFIC FEATURES ....................................................................................................................... 2 FEATURES .................................................................................................
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual LIST OF FIGURES FIGURE 1-1 WRC-CANX-DIN-DN SERIES 4 ................................................................................................................ 1 FIGURE 4-1 WRC-CANX-DIN SERIES 4 DIMENSIONAL DRAWING .............................................................................. 6 FIGURE 4-2 WRC-CANX-NEM SERIES 3 DIMENSIONAL DRAWING ............................................................................
1. Overview 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.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual 1.1. Series 4 Specific Features The Series 4 CANX provides enhancements over previous versions.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual 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.
Western Reserve Controls PUB 14.1 2. WRC-CANX-xx Series 4 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 4. To Install and Establish Communications 1.
Western Reserve Controls PUB 14.1 3. WRC-CANX-xx Series 4 User’s Manual 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 CANbased 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.
Western Reserve Controls PUB 14.1 4. WRC-CANX-xx Series 4 User’s Manual 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. NSA DGN MS W1 NETWORK A 1.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual 5 4 3 2 1 V+ CH CL V- DeviceNet Male, Mini W1 NSA DGN MS NETWORK A DeviceNet Female, Mini --NET A- --NET B1 2 3 4 5 6 7 8 2.27” ( 57,7 mm) SW1 W3 NSB 1 2 3 4 5 V- CL CH V+ NETWORK B 5.11” (130 mm) 2.25” ( 57,2 mm) DeviceNet Female, Mini DeviceNet Male, Mini 0.82” (80,2 mm) 5.11” (130 mm) Figure 4-2 WRC-CANX-NEM Series 3 Dimensional Drawing 4.2.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual 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. The baud rates can be set independently, or one side can take its baud rate from the other side (in the “Remote” setting). The Autobaud detects from DeviceNet bauds. For CANopen speeds, select the fix baudrate setting.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual Table 4-2 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. Flashing Red Minor Fault Advanced Memory Technology (AMT) buffers space exceeded. Red Unrecoverable Fault WRC-CANX may be damaged. Flashing Red/Green Device Self-Testing WRC-CANX is in self-test mode.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual 4.5. Network Cabling and Configuration This section provides general guidelines for connecting DeviceNet and SDS systems. You can find detailed specifications in the appropriate ODVA DeviceNet and Honeywell SDS specifications. 4.5.1. Cable Lengths The following provide cable length limits for DeviceNet and SDS systems.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual on-board terminator in not desired. For the side B sub-network, install or remove jumper W3. The CANX is shipped from the factory with the jumpers installed. Trunk line use For the purpose of network termination, the CANX is treated as the last node on the section of the trunk network to which it is connected. Therefore, when a CANX is used directly in a trunk line, it must be terminated on both the Network A and Network B sides.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual 4.5.3. 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.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual Figure 4-5 WRC-CANX-NEM DeviceNet Connectors 4.5.4. 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.
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Western Reserve Controls PUB 14.1 5. WRC-CANX-xx Series 4 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 14.1 WRC-CANX-xx Series 4 User’s Manual 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 14.1 WRC-CANX-xx Series 4 User’s Manual 5.1.4. 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 14.1 6. WRC-CANX-xx Series 4 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 14.1 7. WRC-CANX-xx Series 4 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 • CANX-DIN Link Connector and Terminator Resistor • CANX-NEM Cable WRC P/N Equivalent Mfr. Part Number CANX-DN-CK Phoenix Contact MSTB2.5/5-ST-5.08/AU n/a Various manufacturers’ Mini-Style Connector Examples: Cable assy. w/ female threads, fem.
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Western Reserve Controls PUB 14.1 8. WRC-CANX-xx Series 4 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 14.1 9. WRC-CANX-xx Series 4 User’s Manual Summary of Changes to Series 4 from Rev 2 and Series 3 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. 9.1. DIP Switch Baud Rate Settings Several new options exist for setting the baud rate on the CANX Series 3.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual 10. Frequently Asked Questions 1. On what networks do the WRC CANX and CANR work? The WRC CANX and CANR function with DeviceNet, CANopen, J1939, SDS and other CAN 2.0, Part A and Part B networks. If you don’t see your network listed here contact WRC for more information on your network compatibility. 2.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual 4. Why does WRC offer CANX & CANR extenders? The WRC-CANX/R Extenders are a family of products that extend the communications cable lengths for DeviceNet, J1939, CANopen and other CAN, V2.0, Part A or Part B serial bus systems. These repeaters serve to: • extend a network beyond its absolute maximum length (e.g., 500 meters for DeviceNet) at the slowest speed • implement a longer network for a given baud rate (e.g.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual • The WRC CANX has two user-selectable 121-ohm resistors on board. Keeping the plastic jumpers, which are installed on all units at the factory, on W1 and W3 will keep these resistors in the circuit, across the CAN data lines.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual 8. How do I determine the location in my network at which I might need a WRC CANX or CANR? • Drop Line: The WRC CANX or CANR should be used in a drop line when you would like to extend the drop more than 6m. • Trunk Link: The CANX or CANR should be used in the main trunk line when you desire to extend a network beyond its maximum length (e.g.
Western Reserve Controls PUB 14.1 WRC-CANX-xx Series 4 User’s Manual link is hooked up correctly (blinking green with no messages, solid green with messages) or incorrectly (red). The MS LED gives the status of the unit. If it is green the unit is operating normally. If it is blinking red the unit is out of memory, while solid red means the device has failed and may be need to be power cycled or be repaired. Please refer the WRC CANX or CANR User’s Manual and see the section on “LED Operation.” 14.
