G34850000700 - Carlo Gavazzi Group

Du line

Fieldbus Installationbus

Specifications are subject to change without notice (30.04.03) 1

Dupline®is a registered trademark. A product of the CARLO GAVAZZI Group

Supply Ordering no.

15 to 30 VDC G 3485 0000 700

Type: Dupline®

H4-Housing

Power supply

• For systems using a combined

communication-supply bus (3-wires)

• Input from a standard 15... 30 VDC power supply

• Coupling of transmission- and supply-common

• Output current 4 A max.

• H4-housing

Product Description

Type Selection

Supply Coupling Unit

Type G 3485 0000

Ordering Key

The supply coupling unit is

mainly used in those applica-

tions, where multiple

Dupline®modules of the type

G21...700 are to be supplied

through a DC-bus. Since

these modules use the same

wire for the common of the

transmission signal and the

"minus" of the DC-supply, the

G 3485 000 assures proper

coupling of the supply to

maximise the noise immunity

of the entire installation. To

supply a current ≤4 A (up to

25°C) / ≥3A(under 50°C),

multiple coupling units may

be installed in parallel.

Output Specifications

Output

Output voltage VBB 15 to 30 VDC (pulsating)

Output current ≤4 A (up to 25°C)

≥3A(under 50°C

Short-circuit protection None

Output voltage drop ≤1 VDC

Supply Specifications

Power supply

Installation cat. III (IEC 60664)

Operational voltage

through term. 7 (+) & 8

15 to 30 VDC (ripple included)

Ripple ≤3 V

Reverse polarity protection Yes

Current consumption ≤30 mA

Power consumption ≤0,5 W

Inrush current ≤ 200 mA

Transient protection voltage 800 V

Insulation voltage

Supply - Dupline®None

Supply - output None

General Specifications

Indication for

Dupline®carrier LED, yellow

Supply LED, green

Environment

Degree of protection IP 20 B

Pollution degree 3 (IEC 60664)

Operating temperature -20° to +50°C (-4° to +122°F)

Storage temperature

-50° to +85°C (-58° to +185°F)

Humidity (non-condensing) 20 to 80%

Mechanical resistance

Shock 15 G (11 ms)

Vibration 2 G (6 to 55 Hz)

Dimensions

Material

(See "Technical information") H4-housing

Weight 200 g

G 3485 0000 700

Du line

Fieldbus Installationbus

2Specifications are subject to change without notice (22.03.2006)

Dupline®is a registered trademark. A product of the CARLO GAVAZZI Group

G 3485 0000

Wiring Diagram Mode of Operation

The supply coupling unit was

designed for all those appli-

cations where DC-supplied

Dupline®modules of the type

G 21...700 are used. The

characteristic of these modu-

les is, that the common of the

transmission signal is identical

to the minus of the supply.

The catalogue states that

such modules shall not be

supplied by a DC-bus which

exceeds the distance of 3 m.

In the worst case this means

that an individual DC-supply

unit must be used for every

module. In some applications

this is impossible because

there is no power available at

site. The supply of such units

through a DC-bus can now be

done through the use of the

G 3485 0000.

The supply voltage at the

input terminals of the unit is

coupled to the output termi-

nals via a switching device

that is synchronised by the

Dupline®signal carrier. The

supply is decoupled from the

3-wire during the short peri-

ods of signal transmission

where a load current could

cause disturbances. The

maximum current per cou-

pling unit is ≤4 A (up to 25°C)

/≥3A(under 50°C). Multiple

coupling units may be

connected to the same sup-

ply in parallel if the maximum

current consumption of the

system (supply of Dupline®

modules and supply of load)

exceeds the maximum output

for a single unit.

S: signal wire

S(Dupline®) I1

GND

G2140 5520 700

S(Dupline®) I1

GND

G2140 5520 700

1 2 3 4 5 6 7 8

21 22 23 24 25 26 27 28

Dupline®

G3485 0000 700

D34900000

Accessories

DIN-rail FMD 411

For further information refer to "Accessories".

Design Rules

Note the output voltage drop

of ≤1.0 V. This, together with

the output voltage drop of

G 2140 5507 00, should be

taken into consideration when

selecting the output voltage of

the standard DC-supply. Also,

the DC-supply must be able

to supply twice the total load

current, since the output volt-

age of G 3485 0000 700 is

pulsating.

There is a limit for the voltage

drop VCW in the common

wire.

VCW = RCW x ITL

RCW : Resistance in the com-

mon wire

ITL = Total load current

If the load is distributed uni-

formly along the 3-wire, then

max. VCW is 3.5 V.

If the entire load is in the far

end from the G34850000700

then the max. VCW is 2.0 V.

The above limitations can be

overcome by adding another

DC-supply with G34850000

700 along the line. Whenever

another pair (G3485000700

and DC-supply) is added the

two pairs will supply half the

load current running in half

the wire resistance and here-

by the VCW - limit is increased

by a factor of 4.

Dimensions (mm)

H4-housing