Operation principle and hardware description 47
The output indication of the relay can be wired by the customer for example to
• the main contactor or breaker control circuit of the drive, to open it in case of motor
overtemperature,
• the appropriate digital input of the drive, to trip the drive and generate a fault message
in case of motor overtemperature, or
• an external monitoring circuit.
Option +L513 is an ATEX-certified thermal protection function that has the same external
connectivity as +L505. In addition, +L513 comes with +Q971 (ATEX-certified safe
disconnection function) and is wired at the factory to activate the Safe torque off function of
the drive in an overtemperature situation. A manual reset for the protection function is
required by Ex/ATEX regulations. For more information, see ATEX-certified motor thermal
protection functions for cabinet-built ACS880 drives (options +L513+Q971 and
+L514+Q971) user’s manual (3AXD50000014979 [English]).
Options +2L505 and +2L513 duplicate options +L505 and +L513 respectively, containing
the relays and connections for two separate measurement circuits.
+L536, +L537
An alternative to a thermistor relay option is the FPTC-01 (option +L536) or FPTC-02
(option +L537, also requires option +Q971) thermistor protection module. The module
mounts onto the drive control unit, and has reinforced insulation to keep the control unit
PELV-compatible. The connectivity of the FPTC-01 and the FPTC-02 is the same.
FPTC-02 is an ATEX-certified thermistor protection module, Type Examined as a
protective device within the scope of the European ATEX Product Directive.
For protection purposes, the FPTC has a “fault” input for the PTC sensor. An
overtemperature situation executes the SIL/PL-capable SMT (Safe motor temperature)
safety function by activating the Safe torque off function of the drive.
The FPTC also has a “warning” input for the sensor. When the module detects
overtemperature through this input, it sends a warning indication to the drive.
For more information and wiring examples, see the module manuals and the circuit
diagrams delivered with the drive.
More information
See
• firmware manual for parameter settings
• ATEX-certified motor thermal protection functions for cabinet-built ACS880 drives
(options +L513+Q971 and +L514+Q971) user’s manual (3AXD50000014979
[English])
• FPTC-01 thermistor protection module (option +L536) for ACS880 drives user’s
manual (3AXD50000027750 [English])
• FPTC-02 ATEX-certified thermistor protection module, Ex II (2) GD (option +L537
+Q971) for ACS880 drives user’s manual (3AXD50000027782 [English])
• Wiring the PTC thermistor relay(s) (options +L505, +2L505, +L513, +2L513) on page
100
• circuit diagrams delivered with the drive for the actual wiring.
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