Omron 3G3RX2-A2 Series Instruction Manual page 76

Control circuit
■External thermistor
(Wiring example)
External thermistor
terminals
TH+ TH-
Thermistor Analog
terminal input
32
Thermistor
Terminal Terminal
symbol name
External Connect to an external thermistor to make
thermistor the inverter trip if an abnormal temperature
TH+
input is detected.
Connect the thermistor to TH+ and TH-.
Common
The impedance to detect temperature
for external
errors can be adjusted within the range 0Ω
thermistor
to 10,000Ω.
TH-
[Recommended thermistor properties]
Allowable rated power: 100 mW or more
Impedance at temperature error: 3kΩ
Control circuit terminal
• Twist the cables connected from a thermistor to the TH
terminal only between TH+ and TH-, and separate the
twisted cables from other cables.
• Since very low current flows through the cables
connected to the thermistor, separate the cables from
those (power line cables) connected to the main circuit.
• The length of the cables connected to the thermistor
must be 20 m or less.
Description Electrical characteristics
DC 0 to 5V
[Input circuit]
DC5V
1kΩ
TH+
2kΩ
Thermistor
TH-