1 1 11 102 3 4 5 6 7 8 9 12112 2 31 1 11 102 3 4 5 6 7 8 9 12113 3 31 1 11 102 3 4 5 6 7 8 9 12112 2 2130BA176.111 NC2 Live part3 PELVIllustration 7.8 Correct Relay WiringNOTICEDo not combine 24/48 V systems with high-voltagesystems.7.11.3 VLT® PTC Thermistor Card MCB 112The MCB 112 option makes it possible to monitor thetemperature of an electrical motor through a galvanicallyisolated PTC thermistor input. It is a B option for frequencyconverters with STO.For different application possibilities, seechapter 4 Application Examples.X44/1 and X44/2 are the thermistor inputs. X44/12 enablesSTO of the frequency converter (T37), if the thermistorvalues make it necessary, and X44/10 informs thefrequency converter that a request for STO came from theMCB 112 to ensure suitable alarm handling. One of thedigital input parameters (or a digital input of a mountedoption) must be set to [80] PTC Card 1 to use theinformation from X44/10. Configure 5-19 Terminal 37 DigitalInput to the desired STO functionality (default is safe stopalarm).MS 220 DA1110 20-28 VDC 10 mA12 20-28 VDC 60 mAcomZIEHLX4412 13 18 19 27 29 32 33 20 373 NC4 NC5 NC6 NC7 NC8 NC9 NC10 11 NC121 T12 T2TP TPPTCM3~130BA638.10DOMotor protectionMCB 112 PTC Thermistor Card Option BReference for 10, 12DO FOR SAFESTOP T37Code No.130B1137Control Terminals of FC302Illustration 7.9 Installation of MCB 112ATEX Certification with FC 102, FC 103, FC 202, and FC302The MCB 112 has been certified for ATEX, which meansthat the frequency converter with the MCB 112 can beused with motors in potentially explosive atmospheres. Seethe VLT® PTC Thermistor Card MCB 112 OperatingInstructions for more information.Illustration 7.10 ATmosphère EXplosive (ATEX)Specifications Design GuideMG20N602 Danfoss A/S © 09/2014 All rights reserved. 1697 7
