６Ｆ８Ａ０８７０
Notes on wiring
CAUTION
(1)Select the cable runs away from electrical equipment (motors, transformers, or radio transmitters) which causes electromagnetic or electrostatic interference.
(2)Deterioration of flowmeter circuit insulation occurs if the converter interior or cable ends get wet or humidified. This in turn causes malfunction of flowmeter or noise problems. Avoid a rainy day if the flowmeter is to be installed outdoors. Even indoors, prevent water from splashing over the flowmeter. Try to finish the wiring as quickly as possible
(3)The converter has an arrestor installed inside. Therefore, do not conduct a withstand voltage test for the converter. To check the insulation of the converter, use a voltage of 250Vdc or less.
(4)After wiring, be sure to install the terminal block protection cover.
(5)Because the excitation cable and flow rate signal cable transmit very delicate signals, pass each of
Separate | them separately through a thick steel conduit tube, keep them away from the large current wiring as | |
far as possible, and do not install them in parallel. | ||
|
5.1 Cables
Separate
Separate
Use the kind of cables shown in Table 5.1 to wire the converter.
Table 5.1 Installation Cables
|
| Nominal | Finished |
|
Name | Cable name | outer | Description | |
|
| al area | diameter |
|
|
|
|
|
|
Power cable | 2 mm² | 11~13mm | CVV JIS C 3401 or | |
sheathed cable | equivalent | |||
Output | The number of conductors the cable contains differs depending on the | |||
specification of the output signal cable. |
|
| ||
signal cable | Use a shielded cable of finished outer diameter 11 to | 13mm and | equivalent | |
| nominal |
|
|
|
Flow rate | 0.75 mm2 |
| ||
11~13mm | JIS C 3327 or | |||
signal cable | ( Rubber covered cable ) |
|
| equivalent |
|
|
| ||
|
|
|
|
|
Excitation | 2 mm2 |
| 2PNCT | |
cable | ( Rubber covered cable ) | 1.25 m2 | 11~13mm | JIS C 3327 or |
|
|
|
| equivalent |