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Danger! Dangerous electrical voltage! Before commencing the installation • Disconnect the power supply of the device. • Suitable safety hardware and software measures should be implemented for the • Ensure that devices cannot be accidentally I/O interface so that a line or wire breakage restarted.
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• Measures should be taken to ensure the • Wherever faults in the automation system proper restart of programs interrupted may cause damage to persons or property, after a voltage dip or failure. This should external measures must be implemented to not cause dangerous operating states even ensure a safe operating state in the event for a short time.
10/12 MN04913001Z-EN Content About this Manual Target group Writing conventions Abbreviations and symbols List of revisions CMD contactor monitoring relays Application of the CMD System overview Improper use Engineering Distinction from other regulations Performance Level Control system of category 3 Average diagnostic coverage DC Mean time to dangerous failure MTTF Approvals...
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10/12 MN04913001Z-EN Content Appendix Nameplate Technical Data – General – Contacts – Magnet systems Dimensions...
10/12 MN04913001Z-EN About this Manual Target group This manual is aimed at specialist personnel involved in the design, installation, commissioning and maintenance of plant safety functions. It describes the use of the CMD contactor monitoring device in safety-related control systems. Writing conventions Symbols used in this manual have the following meanings: Caution!
10/12 MN04913001Z-EN About this Manual Abbreviations and symbols Institute for Occupational Safety and Health (BGIA) Safety Integrated Level Performance Level Common cause failure Average diagnostic coverage MTTF Mean time to dangerous failure Lifespan up to a dangerous failure Mean number of annual switch operations List of revisions Edition page...
10/12 MN04913001Z-EN CMD contactor monitoring relays Application of the CMD In the event of an emergency in safety-related electrical control circuits, the hazardous plant section is shut down from the main power supply by means of contactors a Emergency stop (stopping in the event of an emergency) in accordance with IEC/EN 60204-1.
The CMD contactor monitoring device requires a control power supply. CMD(24VDC), CMDTD: control voltage 24 V DC The CMD relay can be combined with the following Eaton contactors, motor-protective circuit-breakers and circuit- breakers: • Contactors/contact modules, fitted with an auxiliary NC...
– NZM4, N4 + NZM4-XUV Improper use The CMD contactor monitoring device has only been tested and approved in combination with the Eaton contactors and circuit-breakers that are listed in section “System overview”, (a page 6). The CMD must therefore only be combined with these...
10/12 MN04913001Z-EN Engineering Distinction from other The safety-related part of the CMD contactor monitoring regulations device's control system has EN/ISO 13849-1 approval. The CMD is used for safety-related applications in machine control systems. It has not been assigned to a SIL category as per IEC/EN 61508.
10/12 MN04913001Z-EN Engineering Two CMD relays are required in reversing starter circuits. To attain category 3, faults were excluded by wiring inside a control cabinet. On disconnection via the undervoltage release, a time delay of 100 ms G20 % can occur. An enable circuit must be protected with a max.
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10/12 MN04913001Z-EN Mean time to dangerous failure MTTF The generally recognized inspection frequency is a hundred times more often than the MTTF . The test interval can be determined from: MTTF (formula 1) Test section “Mean time to dangerous failure MTTFd” (a page 11).
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10/12 MN04913001Z-EN Mean time to dangerous failure MTTF The MTTF value of the undervoltage release depends on the application. The following values can be estimated for B Table 2: values for undervoltage release Undervoltage release value [Switch operations] NZM1 10000 NZM2 10000 NZM3...
10/12 MN04913001Z-EN Engineering Approvals The CMD contactor monitoring device is approved by the IFA in combination with Eaton contactors and circuit-breakers (a section ”System overview”, Page 6). A CE declaration of conformity and a prototype test certifica- tion are also available.
10/12 MN04913001Z-EN Installation Mounting The CMD contactor monitoring device is mounted on a top- hat rail. Any mounting position is possible. 90° 90° 90° 90° Figure 2: Mounting positions for CMD The electrical mounting space must at least meet the requirements of IP54 protection.
L1 L2 L3 1.13 1.14 -Q11 -Q12 I > I > I > T2 T3 -Q11 -Q12 TEST -Q11 -Q12 -Q11 -Q12 S21 S22 S13 S14 S31 S32 S21 S22 S13 S14 S31 S32 -Q12 -Q11 V W PE D1 D2 -Q11 -Q12 U <...
10/12 MN04913001Z-EN Installation Wiring The following cables can be used for wiring at the terminals at the CMD contactor monitoring device. Table 4: Conductor cross-sections lb-In 1 x (0.5 - 2.5) 1 x (0.5 - 2.5) 20 - 14 0.8 - 1.2 7.0 - 10.6 2 x (0.5 - 1.5) 2 x (0.5 - 1.5)
10/12 MN04913001Z-EN Operating the device Function messages The CMD contactor monitoring device is fitted with two internal LEDs for status indication at the device. Figure 5: LED indication a A green LED labelled „Contr.“ (Control) The „Contr.“ LED indicates the control for the CMD and the contactor.
10/12 MN04913001Z-EN Operating the device Test function The control system must be tested regularly during operation via the Test button. An annual test is sufficient. The test determines the reliable operation of the undervoltage release. The test button must be provided with another NO contact in addition to the NC contact for the actual test.
10/12 MN04913001Z-EN Appendix Technical Data General Standards IEC/EN 60947; UL, CSA Lifespan, mechanical DC operated Operations x 10 Maximum operating Operations x 10 9000 frequency Climatic proofing • Damp heat, constant, to IEC 60068-2-78 • Damp heat, cyclic, to IEC 60068-2-30 Ambient air temperature Storage °C...
10/12 MN04913001Z-EN Dimensions Standard screwdriver 0.8 x 5.5 / 1 x 6 max. tightening torque 1) Minimum clearance to adjacent devices: 22.5 mm Contacts Rated impulse withstand voltage V AC Overvoltage category/ III/3 pollution degree Rated insulation voltage V AC Rated operational voltage V DC Conventional thermal current...