Thermal Protection With Pt100 Relays (Options +Nl506, +Nl514); Starter For Auxiliary Motor Fan (Options +M6Xx); What The Option Contains - ABB ACS880-07 Series Hardware Manual

56 Operation principle and hardware description
• 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])
• circuit diagrams delivered with the drive for the actual wiring.

Thermal protection with Pt100 relays (options +nL506, +nL514)

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Pt100 temperature monitoring relays are used for overtemperature supervision of motors
equipped with Pt100 sensors. For example, there can be three sensors to measure the
temperature of the motor windings and two sensors for the bearings. As the temperature
rises, the sensor resistance increases linearly. At an adjustable wake-up level, the monitoring
relay de-energizes its output.
The standard Pt100 relay options include two (+2L506), three (+3L506), five (+5L506) or
eight (+8L506) relays. By default, the relays are wired internally to digital input DI6 of the
drive control unit. The loss of the input is set to trigger an external fault. The options include
a terminal block for sensor connection. The output indication on the terminal block can be
wired by the customer, for example, to an external monitoring circuit. See the circuit diagrams
delivered with the drive.
Options +3L514 (3 relays) and +5L514 (5 relays) are ATEX-certified thermal protection
functions that have the same external connectivity as +nL506. In addition, each monitoring
relay has a 0/4...20 mA output that is available on the terminal block. Option +nL514 comes
with +Q971 (ATEX-certified safe disconnection function) as standard and is wired at the
factory to activate the Safe torque off function of the drive in an overtemperature situation.
As the monitoring relay does not have a reset functionality, the manual reset required by
Ex/ATEX regulations must be implemented using drive parameters. 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]).
See also
• 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])
• Pt100 relay alarm and trip limit setting instructions in the start-up instructions
• circuit diagrams delivered with the drive for the actual wiring.

Starter for auxiliary motor fan (options +M6xx)

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What the option contains

The option provides switched and protected connections for 3-phase auxiliary motor fans.
Each fan connection is equipped with
• fuses
• a manual motor starter switch with an adjustable current limit
• a contactor controlled by the drive, and
• terminal block X601 for customer connections.
The number of connections must be specified when ordering. The maximum number of
connections available depends on the current requirement. The lower current ratings allow
up to four fan connections (eg. option +4M602), while the highest current rating only allows