Hardware Manual

Saia-Burgess Controls AG

Hardware Manual PCD 1 / PCD 2 Series│Document 26 / 737│Edition EN 15│2008-07-22

Communication interfaces

4

MP-Bus with PCD2.T500

4.10.8 Maximum line length for 24 VAC supply

Important:      For the NVF24-MFT2, dimensional output must be multiplied by

a factor of 2.

6 4/5 1 2 5 1 2 5 1 2 5

Masse

MP

PCD2.T500

L = max. cable length [m]

24 VAC

Drive

1

Drive

2

Drive

8

Determining maximum line lengths

The dimensional outputs [VA] of all MFT (2) actuators used must be added together

and the corresponding line lengths read from the diagram.

Example: 1 × NM.., 1 × AM.., 1 × AF.. and 1 × NV.. are connected to the MP-Bus.

Total dimensional output: 3 VA + 5 VA + 10 VA + 5 VA = 23 VA

Total power consumption of MFT2 actuators [W]

1

10

100

1000

0 20 40 60 80 100 120 140 160 180 [VA]

0.75 mm^2 1.0 mm^2

1.5 mm^2 2.5 mm^2

Kabellänge [m]

Cable length vs dimensional output applies to AC supply

(minimum transformer voltage 21.6 VAC)

The following can be read from the family of curves:

• Cable with conductor Ø 0.75 mm² gives: Cable length 25 m


• Cable with conductor Ø 1.0 mm² gives: Cable length 33 m


• Cable with conductor Ø 1.5 mm² gives: Cable length 50 m


• Cable with conductor Ø 2.5 mm² gives: Cable length 85 m

4.10.9 Maximum line length for 24 VDC supply

6 4 /5 1 2 5 1 2 5 1 2 5

Masse

MP

PCD2.T500

L = max. cable length [m]

24 VDC

Drive

1

Drive

2

Drive

8

Determining maximum line lengths

Determining maximum line lengths The power consumption values [W] of all

MFT / MFT2 actuators used must be added together and the corresponding line

lengths read from the diagram.

Example: 1 × NM.., 1 × AM.., 1 × AF.. and 1 × NV.. are connected to the MP-Bus.

Total power consumption: 1.3 W + 2.5 W + 6.0 W + 3.0 W = 12.8 W