Hitachi X200-002SFE/NFU Instruction Manuals page 163

4−24
Thermistor Thermal Protection
Motors that are equipped with a thermistor can be protected from overheating. Input
terminal [5] has the unique ability to sense a thermistor resistance. When the
resistance value of the thermistor connected to terminal [TH] (5) and [L] is more than
3 k Ω ±10%, the inverter enters the Trip Mode, turns OFF the output to the motor, and
indicates the trip status E35. Use this function to protect the motor from overheating.
Option
Code
19
Valid for inputs:
Required settings
Notes:
• Be sure the thermistor is connected to terminals
[5] and [L]. If the resistance is above the
threshold the inverter will trip. When the motor
cools down enough, the thermistor resistance
will change enough to permit you to clear the
error. Press the STOP/Reset key to clear the
error.
NOTE: The trip level is hardware wise fixed and cannot be changed.
More user manuals on
Terminal
Function Name
Symbol
TH Thermistor Thermal
Protection
C005 only
(none)
ManualsBase.com
State Description
ON When a thermistor is connected to terminals [5]
and [L], the inverter checks for over-temperature
and will cause trip (E35) and turn OFF the output
to the motor
OFF An open circuit in the thermistor causes a trip,
and the inverter turns OFF the output
Example (requires input configuration—
see page 3–49):
TH
5 4 3
Motor
thermistor
L PCS P24
2 1