ABB FPTC-01, User Manual

Page: 43 / 108

42 Electrical installation
General cabling instructions
1. For the STO circuit wiring, use the type of cable specified in
the appropriate drive or inverter module hardware manual
(except when an FSO module or other safety relays are
installed in the STO command chain).
2. Wire only the sensor circuit into the potentially explosive
atmosphere.
3. The PTC sensor circuit in the Ex Zone must comply with the
requirements for the applicable type of protection, such as:
•
Ex d (EN/IEC 60079-1),
•
Ex eb (IEC 60079-7:2015; Ex e in EN 60079-7:2007 and
IEC 60079-7:2006),
•
Ex ec (IEC 60079-7:2015; Ex nA in
EN/IEC 60079-15:2010).
4. Install the drive (or inverter module), the Safe torque off (STO)
circuit, and the protection relay outside the hazardous zone.
5. Route the sensor cables away from the motor cable.
6. We recommend to use a shielded sensor cable to minimize
electromagnetic interference from power cables.
Note : The drive STO function has a redundant architecture, that is,
both STO channels must be used in the safety function
implementation. For more information, see the hardware manual.
If you do not want to use the XFLT input (Fault), connect a resistor
(100 ohm...1 kohm 1/4 W wire-wound) in the XFLT input instead of
a PTC sensor.
If you do not want to use the XWRN input (Warning), disable the
motor temperature warning with a parameter setting (see chapter
Parameter settings on page 51 ).