Chino KP 2000 Series, Instructions Manual

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3. Input terminal
①
Maximum permitted input of input terminal is as follows. Take care of not applying the input that exceeds
these values. If an input that exceeds the range is applied, the product may get out of order or its
performance may deteriorate remarkably or it may malfunction.
・
Thermocouple, voltage mV, voltage V : Less than
±
20V.
・
Resistance thermometer : Less than 500
Ω
or Less than
±
5V.
・
Current mA : Less than
±
30mA or Less than
±
7.5V.
②
Parallel connection of input is not allowed. Not only measurement error occurs, but also stable control is
not performed and an error occurs in the entire system.
③
For thermocouple, do the wiring up to the input terminal of the product by a thermocouple or compensation
lead wire.
④
To avoid measurement error for resistance thermometer, use cable such that resistance value of each wire
is equal. Take care as burn out is not provided 4-wire resistance thermometer.
⑤
When connecting a protection device like zenner barrier for input protection, sometimes a big
measurement error may occur. Confirm the combination with protection device and maintain the allowable
signal source resistance and allowable wire resistance of the controller.
4. Output terminal
①
Use an output terminal within the rating range. If a load that is out of range is connected, product may get
out of order, its performance may show a remarkable deterioration or it may malfunction.
②
For relay output terminal of ON OFF pulse type and ON OFF servo type connect the load through buffer
relay. For contact protection of product internal relay and for noise reduction always insert a contact
protection device on the coil side of the buffer relay. In the controller also, a small type of contact protection
device is built-in for internal relay protection. Take care because a small leak current flows through this
contact protection device and load voltage.
Leak current is approximately 2mA when load voltage is 200V AC and it is approximately 1mA when load
voltage is 100V AC.
5. Alarm terminal
①
Use the alarm terminal within the rating range. If a load that is out of range is applied, product may get out
of order, its performance may show a remarkable deterioration or it may malfunction.
②
For alarm terminal always connect the load through buffer relay. For contact protection of product internal
relay and for noise reduction always insert a contact protection device on the coil side of the buffer relay.
6. Option terminal
①
Use the option terminal within the rating range. If a load that is out of range is applied, product may get out
of order, its performance may show a remarkable deterioration or it may malfunction.
Precaution
① If a power supply that is out of range is connected, product may get out
of order, its performance may show a remarkable deterioration or it
may malfunction.
② If an excess current or excess voltage is applied to input output
terminal of the controller, the controller may get out of order, its
performance may show a remarkable deterioration or it may
malfunction.