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SMC Networks EX12 SCS Series Operation Manual

Compobus/s compatible si unit
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No.EX※※-OMC0002-C
PRODUCT NAME
CompoBus/S compatible SI unit
MODEL/ Series/ Product Number
EX12#-SCS#

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Summary of Contents for SMC Networks EX12 SCS Series

  • Page 1 No.EX※※-OMC0002-C PRODUCT NAME CompoBus/S compatible SI unit MODEL/ Series/ Product Number EX12#-SCS#...

  • Page 2: Table Of Contents

    Table of Contents Safety Instructions Model Indication and How to Order Summary of Product parts Mounting and Installation Wiring Settings Maintenance Troubleshooting Specification Specifications Dimensions No.EX※※-OMC0002-C...

  • Page 3: Safety Instructions

    Safety Instructions These safety instructions are intended to prevent hazardous situations and/or equipment damage. These instructions indicate the level of potential hazard with the labels of "Caution", "Warning" or "Danger". They are all important notes for safety and must be followed in addition to International Standards (ISO/IEC) , and other safety regulations.
  • Page 4 Safety Instructions Caution 1.The product is provided for use in manufacturing industries. The product herein described is basically provided for peaceful use in manufacturing industries. If considering using the product in other industries, consult SMC beforehand and exchange specifications or a contract if necessary. If anything is unclear, contact your nearest sales branch.
  • Page 5 Operator This operation manual is intended for those who have knowledge of machinery using pneumatic equipment, and have sufficient knowledge of assembly, operation and maintenance of such equipment. Only those persons are allowed to perform assembly, operation and maintenance. Read and understand this operation manual carefully before assembling, operating or providing maintenance to the product.
  • Page 6 Caution ■After completing maintenance, perform appropriate functional checks. Stop operation if the equipment does not function correctly. Otherwise, an unexpected malfunction may occur and safety cannot be ensured. ■Provide grounding to improve the safety and noise resistance of the SI unit. Grounding should be as close as possible to the product and the ground wires should be as short as possible.
  • Page 7 ●Product handling Mounting Do not drop, hit or apply excessive shock to the product. The product will be damaged, leading to failure and malfunction. Tighten to the specified tightening torque. If the tightening torque is exceeded, the mounting screws can be broken. Never mount the product in a location that will be used as a foothold.
  • Page 8 Mount the SI unit in a location that is not affected by vibration or impact. Otherwise it can cause damage or malfunction. Do not use the product in an environment that is exposed to temperature cycle. Heat cycles other than ordinary changes in temperature can adversely affect the inside of the SI unit. Do not expose the product to direct sunlight.

  • Page 9: Model Indication And How To Order

    Model Indication and How to Order EX120-SCS 1 Output type (Valve polarity) 16 outputs, NPN (positive common)/sink 8 outputs, NPN (positive common)/sink Fieldbus CompoBus/S Valve interface EX120 Direct mounting - Plug in EX121 DIN rail mounting - Flat ribbon cable EX122 DIN rail mounting- Plug in Direct mounting –...

  • Page 10: Summary Of Product Parts

    Summary of Product parts EX120-SCS1/2 EX121-SCS1/2 EX122-SCS1/2 No.EX※※-OMC0002-C...
  • Page 11 EX124D/U-SCS1/2 ○Terminal block (with switch cover open) : The terminal screw is an M3 round head combination screw. Element Description Output connector Connects to the valve manifold. LED display to indicate the SI unit status. Display and switch protection cover Setup the node address and HOLD/CLEAR using the internal switches.

  • Page 12: Mounting And Installation

    Mounting and Installation ■Wiring The wiring method for communication and power supply cable is shown below. The tightening torque is 0.5 to 0.6 Nm. The terminal screw is an M3 round head combination screw. Terminal Connection Connect the communication power supply BS+. Connect the communication cable BDH.
  • Page 13 ○Wiring for communication cable There are two methods of CompoBus/S slave connection, T branch type and Multi drop type. In T branch type, the slave is connected to the branch cable from the main cable. In multi drop type, the slave is directly connected to the main cable.
  • Page 14 ○Terminating resistor A terminating resistor should be connected to the end of the main communication cable (the furthest end from the master) to stabilize communication. An OMRON terminating resistor should be used as shown below. Type: SRS1-T Terminal block with terminating resistor. This should be used with VCTF cable and the special flat ribbon cable.

  • Page 15: Settings

    Settings ○Display Display Meaning Turns ON when the communication power supply is applied, and turns OFF when no power is supplied. COMM Turns ON during normal communication, and turns OFF for communication error or during stand-by. Turns ON when a communication error occurs, and turns OFF during normal communication or stand-by. -14- No.EX※※-OMC0002-C...
  • Page 16 ○Switch setting Open the display/switch cover on the top of the SI unit and setup the DIP switches. Turn off the power supply while setting the switches. Node address setting Set the node address for SW1 to 4 as follows. Node address Node address 0: OFF 1: ON...
  • Page 17 ○Output No. assignment Output No. starts from 0, and will be assigned to the valves in order from the D side. : Standard wiring on the manifold is for double-solenoid valves and output number starts A side and B side in that order. If the mounted valves are single solenoid valves, the output on B side will be empty.

  • Page 18: Maintenance

    Maintenance Mounting/Wiring Item to inspect Criteria Countermeasure Check the SI unit terminal for the Perform extra tightening. communication and the power supply are Not loose. (Refer to Mounting and Installation.) connected correctly. Confirm that a terminating resistor is Connect terminating resistors which are Terminating resistor should correctly connected to both ends of the suitable for the cable.
  • Page 19 <Precautions for replacement of SI unit> 1. Be sure to turn the power OFF before replacing the SI unit. Otherwise injury or SI unit malfunction can result. 2. Check the wiring before supplying power. Otherwise damage to the SI unit can result in some wiring conditions, causing breakdown or malfunction. 3.
  • Page 20 3. This releases the lock. Pull the SI unit slowly in a horizontal direction and remove from the manifold. Precautions when opening the cover When opening the cover, hold both sides of the cover. -19- No.EX※※-OMC0002-C...
  • Page 21 Mounting 1. Align the raised part on the manifold side at the bottom of the SI unit with the groove of the manifold, and press it in evenly. 2. Confirm that the SI unit and manifold are securely locked together, and slide the SI unit downwards. -20- No.EX※※-OMC0002-C...
  • Page 22 ○How to replace the EX121/122 Series SI unit Removal 1. Loosen the mounting bracket screw. 2. Remove the SI unit by unhooking claw 2 then claw 1. Mounting 1. Hook claw 1 to the upper side of the DIN rail and claw 2 to the lower side. 2.
  • Page 23 ○How to replace the EX124 Series SI unit Removal 1. Remove the cover from the SI unit, by removing the screws (4 x M4) which hold the cover. 2. Disconnect the wiring from the SI unit, and remove the SI unit from the manifold. Disconnect the wiring to the SI unit.
  • Page 24 <EX124 Series> 3. Remove the manifold wiring from the SI unit. Pull out the cable with connector (manifold wiring) from the manifold while holding the board of the SI unit. Pulling direction Board Cable with connector Mounting 1. Connect the manifold wiring to the SI unit. (Follow the procedure of step 3 in reverse.) Ensure the cable (manifold wiring) does not get caught between the SI unit and the manifold.

  • Page 25: Troubleshooting

    Troubleshooting If the SI unit does not operate correctly, follow the troubleshooting flow diagram below. Please refer to OMRON CompoBus/S manuals for more trouble shoooting. Solenoid valve Only solenoid Failure of solenoid valve does not operate valve LED is ON correctly Refer to fault No.1.
  • Page 26 ○Faults and countermeasures Problem Possible causes Investigation method Countermeasure Check the communication cable is not Defective wiring broken, and confirm that the connection of the power between the power supply cable and Connect the power cable supply for the terminal is not loose. correctly.
  • Page 27 Problem Possible causes Investigation method Countermeasure Check that there is no equipment or Communication high voltage cables which generates Separate the communication failure noise around the communication and line away from noise sources. power supply cables. Communication Check that the communication BDH and line short Wire correctly.

  • Page 28: Specification

    Specification ■Specifications Model No. EX120/121/122/124U/124D-SCS1 EX120/121/122/124U/124D-SCS2 Applicable system CompoBus/S Node address setting range 0 to 14 0 to 15 Communication speed 750 kbps Total branch cable Cable type Main cable length Branch cable length length When using VCTF cables 100 m or less 3 m or less 50 m or less When using special flat ribbon...

  • Page 29: Dimensions

    ■Dimensions EX120-SCS1/2 EX121-SCS1/2 -28- No.EX※※-OMC0002-C...
  • Page 30 EX122-SCS1/2 EX124D/U-SCS1/2 -29- No.EX※※-OMC0002-C...
  • Page 31 Revision history A: Contents revised in several places. B: Contents revised in several places. C: Contents revised in several places. NOTE: Specifications are subject to change without prior notice and any obligation on the part of the manufacturer. © 1998-2015 SMC Corporation All Rights Reserved No.EX※※-OMC0002-C...

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