Additional Circuits for Motor Control in Safety Chain Applications Using an STO TeSys H Motor Starter
Overview
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DAMAGE TO MOTOR
Connect the TeSys H motor starter as specified in the wiring diagrams.
Failure to follow these instructions can result in equipment damage.
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This section provides additional circuits for safe shutdown of motors that use an STO TeSys H motor starter. In these additional circuits, shutdown is achieved by cutting off the power supply on terminal A1 or A2. Repeated shutdown of applications that use these circuits reduces the electrical life of the motor starter to 10,000 cycles.
The circuits in this section are for emergency situations. As soon as the emergency stop button is pushed, the supply voltage is cut off with a safety processing device. The motor voltage is cut off 25 ms after the rated control voltage is cut off.
The following shutdown applications are included in this section:
Implementation
If cross-error exclusion is not allowed, cut off the supply voltage with a dual-channel or two-pole configuration.
The supply voltage to the motor starter is cut off with a single-channel configuration. Therefore, use this type of installation for SIL 3 (category 3, category 4) only if cross-error exclusions are allowed. For example, use this type of installation when the motor starter and the safety processing device are installed in the same control panel.
Dual-Channel Input and Single-Channel Output with an XPSAC Safety Processing Device - Cat.3, PLd According to EN ISO 13849:2006 and SIL 2 According to EN IEC 62061:2005
This dual-channel input, single-channel output, safety chain application uses the following modules:
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Emergency stop
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Preventa XPSAC safety processing device
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STO TeSys H motor starter
Dual-Channel Input and Dual-Channel Output with XPSAC Safety Processing Device - Cat.3, PLd According to EN ISO 13849:2006 and SIL 2 According to EN IEC 62061:2005
This dual-channel input, dual-channel output, safety chain application uses the following modules:
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Emergency stop
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Preventa XPSAC safety processing device
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STO TeSys H motor starter
