Handling Precautions
•Before wiring the DCP301, check the controller catalog No. and terminal Nos. on the label on the rear of the body. After wiring the DCP301, be sure to check the wiring for any mistakes.
•Maintain a distance of at least 50cm between I/O leads or communications leads and the power lead. Also, do not pass these leads through the same piping or wiring duct.
•When wiring with crimped terminals, take care to prevent contact with adjacent terminals.
•When connecting the DCP301’s thermocouples in parallel to other controllers,
make sure that the total input impedance of the other controller is at least 1MΩ.
If the input impedance is less than 1MΩ, the DCP301 may not be able to detect sensor disconnection.
•When inputting the DCP301’s I/O (parallel connection in case of input) to an A/ D converter or analog scanner, read data may fluctuate.
To prevent this, adopt one of the following measures.
(1)Use a
(2)Insert an isolator without a switching power supply between the DCP301 and A/D converter.
(3)Average data on a personal computer when reading data.
(4)If possible, set a filter for the input.
•Provide the wiring for the instrument power supply with a mains power shutoff switch within reach of the instrument operator.
•Provide the wiring for the instrument power supply with a delayed operation type (T) 1A current rating, 250V voltage rating fuse. (IEC 127)
•Devices and systems to be connected to this unit must have the basic insula- tion sufficient to withstand the maximum operating voltage levels of the power supply and input/output parts.
