Thermistor protection modules for ACS580 drives

The ACS580 drives are available with ATEX-certified thermistor protection module CPTC-02 for ensuring safe motor temperature. This option module enhances process safety and simplifies installation.

User benefits

  • Enhanced process safety
  • Easy, simplified installation – removes the need to built a safety circuit with separate ATEX certified components.
  • No external safety add-ons, such as safety relays.
  • Drive’s integrated Safe Disconnection function eliminates the need for motor contactors.
  • Reinforced insulation between the motor thermistor connection and the other terminals of the module.
  • The CPTC-02 thermistor protection module has SIL 2/PL c capability and complies with the safety device requirements in ATEX directive 2014/34/EU and in European Union Machinery Directive 2006/42/EC.

Share this page

Share this page

Reliable, integrated safety

The ACS580 drives can be ordered with thermistor protection module option. The thermistor protection module CPTC-02 is certified by TÜV Nord according to the main functional safety standards. In addition, the CPTC-02 is type examined as a protective device within the scope of the European ATEX product directive. CPTC-02 module together with Safe Torque Off (STO) function of the drive, implements the Safe Motor Temperature safety function (EN/IEC 61800-5-2) that prevents the motor from exceeding the specified temperature limit.

Easy installation

The thermistor protection module plugs into the drive and enables certified temperature protection for motors in potentially explosive atmospheres. The module is compact in size and easy to connect with the motor‘s surface temperature sensor.

Extending application safety

The module includes PTC sensor input executing the SIL/PL capable Safe Motor Temperature safety function by activating the drive’s STO. The module has reinforced insulation between the motor thermistor connection and the other terminals. The insulation forms a reliable protective separation between the motor main circuit and the drive control board. Safety function selection and configuration is done with the drive’s control panel or with Drive composer PC tool, which is also used for other configurations of the ACS580 series drives.

Technical data

Safety function compliance  Safe Motor Temperature (SMT) safety function according to EN/IEC 61800-5-2. EN/IEC 61800-5-2, IEC 61508 ed. 2, IEC 61511: SIL 2 capability. EN ISO 13849: PL c (Cat.1). EN 50495.
Product compliance Machinery Directive 2006/42/EC and ATEX Directive 2014/34/EU
Length 109 mm
Width 74 mm
Depth 30 mm
Weight 108 g
Thermistor inputs One PTC thermistor input, activating STO function.
Power supply CPTC-02 can be powered from the drive or an external power supply
Transportation and storage temperature –40 °C to +70 °C
Relative humidity
5 to 95%, no condensation allowed
Operation ambient temperature
–15 °C to +50 °C
Degree of protection
Electromagnetic immunity (EMI)
IEC 61326-3-1
TÜV Nord (Functional Safety)
VTT expert services Ltd (ATEX)
Ordering codes
+L537 and +Q971 for the ATEX-certified thermistor protection module CPTC-02
VTT expert services Ltd (ATEX: FPTC-02)
VTT expert services Ltd (ATEX: FPTC-02)
Select region / language