ESD CAN-T-Connector, Manual

Page 1: ...Manual to Product C 1311 03 CAN T Connector Manual Doc No C 1311 21 Rev 1 3 Page 1 of 22 esd electronics gmbh Vahrenwalder Str 207 30165 Hannover Germany http www esd eu Phone 49 0 511 3 72 98 0 Fax 49 0 511 3 72 98 68 ...

Page 2: ...ties and reproduction of this document in any form whole or in part are subject to esd s written approval 2018 esd electronics gmbh Hannover esd electronics gmbh Vahrenwalder Str 207 30165 Hannover Germany Phone 49 511 372 98 0 Fax 49 511 372 98 68 E Mail info esd eu Internet www esd eu This manual contains important information and instructions on safe and efficient handling of the CAN T Connecto...

Page 3: ...ter revised note concerning shielding inserted 2 1 1 New chapter Shielding General Description 2 1 2 New chapter Usage in Light Industrial Environment Single Twisted Pair Cable 2 1 3 New chapter Usage in Heavy Industrial Environment Double Twisted Pair Cable 3 4 CAN Wiring Hints an Trouble Shooting Guide inserted 5 Chapter Declaration of Conformity 6 Order Information moved and revised 1 2 2 1 1 2...

Page 4: ...de a warning relating to property damage DANGER Danger statements indicate a hazardous situation which if not avoided will result in death or serious injury WARNING Warning statements indicate a hazardous situation that if not avoided could result in death or serious injury CAUTION Caution statements indicate a hazardous situation that if not avoided could result in minor or moderate injury NOTICE...

Page 5: ...e care when handling Do not operate the CAN T Connector adjacent to heat sources and do not expose it to unnecessary thermal radiation Qualified Personnel This documentation is directed exclusively towards personnel qualified in control and automation engineering The installation and commissioning of the product may only be carried out by qualified personnel which is authorized to put devices syst...

Page 6: ...hing 13 3 2 4 Termination 13 3 3 Heavy Industrial Environment Double Twisted Pair Cable 14 3 3 1 General Rules 14 3 3 2 Device Cabling 15 3 3 3 Branching 15 3 3 4 Termination 15 3 4 Electrical Grounding 16 3 5 Bus Length 16 3 6 Examples for CAN Cables 17 3 6 1 Cable for light industrial Environment Applications Two Wire 17 3 6 2 Cable for heavy industrial Environment Applications Four Wire 17 4 CA...

Page 7: ...orrect connection of modules to a bus system e g CAN 1 1 View Fig 1 CAN T Connector view 1 2 Dimensions Fig 2 Dimensions of the CAN T Connector CAN T Connector Manual Doc No C 1311 21 Rev 1 3 Page 7 of 22 33 0 5 2 7 20 5 6 4 0 9 pin DSUB female connectors 16 5 22 5 3 5 0 All dimensions in mm 9 pin DSUB male connector ...

Page 8: ...eserved 1 6 GND CAN_L 2 7 CAN_H CAN_GND 3 8 reserved reserved 4 9 reserved CAN_SHLD 5 Signal Description CAN_L CAN_H CAN signal lines CAN_GND Reference potential of local CAN physical layer CAN_SHLD Optional CAN shield GND Optional ground reserved Reserved for future applications do not connect NOTICE Note that the metal shells of the DSUB connectors are not connected Thus the metal shells are not...

Page 9: ... see Figure 4 the cable shield braided shield is used as signal CAN_GND but this signal is not connected to the metal shell of the DSUB9 connectors Instead the CAN_GND signal is connected to Pin 3 Therefore the CAN T Connector is compatible with the standard esd CAN cables Fig 4 Internal connection of the CAN T Connector using single twisted pair cable CAN T Connector Manual Doc No C 1311 21 Rev 1...

Page 10: ...be connected to an external shield connection for example via clamp straps see Figure 5 to connect the shield potentials of the cables Fig 5 Internal connection of the CAN T Connector using double twisted pair cable Page 10 of 22 Manual Doc No C 1311 21 Rev 1 3 CAN T Connector CAN_H CAN_GND CAN_L CAN_H CAN_GND CAN_L Braided Shield Metal Shell Braided Shield Metal Shell Braided Shield Metal Shell E...

Page 11: ...e the original ISO 11898 They have made system level tradeoffs for data rate cable length and parasitic loading of the bus However for CAN network design margin must be given for signal loss across the complete system and cabling parasitic loadings network imbalances ground offsets against earth potential and signal integrity Therefore the practical maximum number of nodes bus length and stub leng...

Page 12: ...al CAN_GND has to be connected to the functional earth FE at exactly one point 4 A CAN net must not branch exception short cable stubs and has to be terminated with the characteristic impedance of the line generally 120 Ω 10 at both ends between the signals CAN_L and CAN_H and not at CAN_GND 5 Keep cable stubs as short as possible l 0 3 m 6 Select a working combination of bit rate and cable length...

Page 13: ...s equipped at the CAN interface at the end of the bus is connected this one has to be used for termination instead of an external CAN termination plug 9 pin DSUB termination connectors with integrated termination resistor and male and female contacts are available from esd order no C 1303 01 DSUB termination connectors with male contacts order no C 1302 01 or female contacts order no C 1301 01 and...

Page 14: ...bs and has to be terminated with the characteristic impedance of the line generally 120 Ω 10 at both ends between the signals CAN_L and CAN_H and not to CAN_GND 5 Keep cable stubs as short as possible l 0 3 m 6 Select a working combination of bit rate and cable length 7 Keep away CAN cables from disturbing sources If this can not be avoided double shielded cables are recommended Figure 8 CAN wirin...

Page 15: ...T connector can be used in which the shield potential is looped through e g the DSUB9 connector from ERNI ERBIC CAN BUS MAX order no 154039 If a mixed application of single twisted and double twisted cables is unavoidable take care that the CAN_GND line is not interrupted Deviations from the bus structure can be realized by the usage of repeaters 3 3 4 Termination A termination resistor has to be ...

Page 16: ...oss section depending on the cable length are described in the CiA recommendation CiA 303 1 see CiA 303 CANopen Recommendation Part 1 Cabling and connector pin assignment Version 1 8 0 Table 2 Bit Rate kbit s Theoretical values of reachable wire length with esd interface lmax m CiA recommendations 07 95 for reachable wire lengths lmin m Standard values of the cross section according to CiA 303 1 m...

Page 17: ...ermany www concab de e g BUS PVC C 1x 2x 0 22 mm Order No 93 022 016 UL appr BUS Schleppflex PUR C 1x 2x 0 25 mm Order No 94 025 016 UL appr 3 6 2 Cable for heavy industrial Environment Applications Four Wire Manufacturer Cable Type U I LAPP GmbH Schulze Delitzsch Straße 25 70565 Stuttgart Germany www lappkabel com e g UNITRONIC BUS CAN UL CSA 2x 2x 0 22 UL CSA approved Part No 2170261 UNITRONIC B...

Page 18: ...esistance of the CAN data pair conductors and the attached terminating resistors To test it please 1 Turn off all power supplies of the attached CAN nodes 2 Measure the DC resistance between CAN_H and CAN_L at one end of the network see figure above The measured value should be between 50 Ω and 70 Ω If the value is below 50 Ω please make sure that there is no short circuit between CAN_H and CAN_L ...

Page 19: ...it data if there is a short circuit between CAN_GND and CAN_L but generally the error rate will increase strongly Make sure that there is no short circuit between CAN_GND and CAN_L 4 4 CAN_H CAN_L Voltage Each node contains a CAN transceiver that outputs differential signals When the network communication is idle the CAN_H and CAN_L voltages are approximately 2 5 V measured to CAN_GND Faulty trans...

Page 20: ...twork see figure below 2 Measure the DC resistance between CAN_H and CAN_GND see figure below 3 Measure the DC resistance between CAN_L and CAN_GND see figure below The measured resistance has to be about 500 kΩ for each signal If it is much lower the CAN transceiver it is probably faulty Another indication for a faulty transceiver is a very high deviation between the two measured input resistance...

Page 21: ...Declaration of Conformity 5 Declaration of Conformity CAN T Connector Manual Doc No C 1311 21 Rev 1 3 Page 21 of 22 ...

Page 22: ...h manuals see table below Please download the manuals as PDF documents from our esd website www esd eu for free Manuals Order No CAN T Connector ME Hardware manual in English C 1311 21 CAN Wiring Notes on the Wiring of CAN Bus Systems and Cable Selection C 1300 02 Table 3 Available manuals Printed Manuals If you need a printout of the manual additionally please contact our sales team sales esd eu ...