Phoenix Contact SCK-M-U-1500V Handleiding (128 Pagina's)

Handleiding

SOLARCHECK family

48

PHOENIX CONTACT 105608_en_01

6.4.2 Material requirements

Only use suitable connecting cables:

– Copper cable, suitable for ambient temperatures up to 75°C

– Installation method must be appropriate for the ambient conditions

– Required tightening torque of 0.5 Nm to 0.6 Nm

6.4.3 Cable lengths and conductor cross-sections

The connection terminal blocks of the SOLARCHECK devices can be connected to cable

cross-sections from 0.14 mm

2

to 2.5 mm

2

. For the minimum connectable cross-section of

0.14 mm

2

, you can even implement cable lengths of up to 300 m between the measuring

and communication modules. However, these small cross-sections are susceptible to inter-

ference and a relatively high voltage drop in borderline cases (e.g., voltage on the supply

side already at the minimum limit), which can mean that the devices in the field are not ad-

equately supplied.

It is therefore strongly recommended that the conductor cross-sections mentioned above

are used. In this case, distances of 500 m including the recommended surge protective de-

vices (see “Accessories” on page 118) can be covered.

There is no reliable information about operation at distances >500 m between the measur-

ing and communication modules.

The cable length may be exceeded at the discretion of the installer, who is then responsible

for any such instances. In such cases, it is recommended that a corresponding voltage drop

calculation is performed for the cable and that the surge protection elements used are also

taken into consideration. Perform an on-site check to determine whether the required sup-

ply voltage is available at the input of the SOLARCHECK devices under all operating con-

ditions.

Table 6-8 Recommended conductor cross-sections for cable lengths up to 500 m

Type Cross-section

RS-485 0.25 mm

2

SCK bus 0.75 mm

2

Analog connection (0.5 m, max.) 0.75 mm

2

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