104 Electrical installation – IECDI6 (XDI:6) as PTC sensor inputA PTC sensor can be connected to this input for motor temperature measurement asfollows. The sensor resistance must not exceed the threshold resistance of the digitalinput at the motor normal operating temperature. Do not connect both ends of thecable shield directly to ground. Leave the other end of the shield unconnected orground it indirectly via a few nanofarads high-frequency capacitor, for example, 3.3nF / 630 V. The shield can also be grounded directly at both ends if they are in thesame ground line with no significant voltage drop between the end points. See thefirmware manual for parameter settings.Safe torque off (XSTO)For the drive to start, both connections (OUT1 to IN1 and IN2) must be closed. Bydefault, the terminal block has jumpers to close the circuit. Remove the jumpersbefore connecting an external Safe torque off circuitry to the drive. See chapter Safetorque off function on page 213.Safety functions module connection (X12)See section Implementing the safety functions provided with the FSO safety functionsmodule (options +Q972 and +Q973) on page 70, and FSO-12 safety functionsmodule user’s manual (3AXD50000015612 [English]) or FSO-21 safety functionsmodule user’s manual (3AXD50000015614 [English]). Control cable connection procedure (IEC)WARNING! Obey the instructions in chapter Safety instructions on page 13. Ifyou ignore them, injury or death, or damage to the equipment can occur.WARNING! As the inputs pictured above are not insulated according toIEC 60664, the connection of the motor temperature sensor requires doubleor reinforced insulation between motor live parts and the sensor. If the assemblydoes not fulfill the requirement, the I/O board terminals must be protected againstcontact and must not be connected to other equipment or the temperature sensormust be isolated from the I/O terminals.PTCDI6+24VDT“0” > 4 kohm“1” < 1.5 kohmImax = 5 mA
