Hitachi L100 User Manual

Page 108

L100 Inverter

Oper

ions

and Monit

ring

4–17

PTC 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 voltage. When the resistance value
of the thermistor connected to terminal [PTC] (5) and [L] is more than 3 k Ohms ± 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

Terminal

Symbol

Function Name

Input

State

Description

PTC

PTC Thermistor
Thermal Protection

ANLG

When a thermistor is connected to terminals 5
and L, the inverter checks for over-temperature
and will cause trip event and turn off output to
motor

OPEN

A disconnect of the thermistor causes a trip
event, and the inverter turns off the motor

Valid for inputs:

C05 only

Required settings:

(none)

Notes:
•

This function is assigned to the input terminal 5
only. If this function is assigned without connection
the thermistor, the inverter automatically enters the
Trip Mode. Be sure the thermistor is connected to
terminals 5 and L, and then restart.

Example:

PTC

MOTOR

thermistor

P24

Technologies Inc.

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