GH34850000724 - Carlo Gavazzi Group

Du line

Fieldbus Installationbus

Specifications are subject to change without notice (05.04.2006) 1

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

Supply type Ordering no.

20-30 VDC GH34850000724

• Generates 28 V Hi-Line signal

• Supplies and controls up to 64 valve I/O modules over

two wires

• Up to 7 km transmission distance

• Built-in Gas-arrestor for lightning protection

• H4 housing

• LED-indications for Dupline carrier, Hi-Line carrier and

supply

• DC power supplied

Product Description

Type Selection

Dupline®Hi-Line Booster Module for Valve Control

Type GH34850000

GH34850000724 is a con-

verter module for the

Dupline®irrigation control

concept. It converts a stan-

dard Dupline®signal to a

28V "Hi-Line" signal, which

can be used to supply and

control up to 64 Valve I/O

modules. GH34850000724

can be used with any type of

Dupline®channel generator,

including Modbus interfaces

and dedicated interfaces for

most PLC brands.

The two-wire Hi-Line cable

can be up to 7 km long.

Supply Specifications

Supply Supply must be galvanically

isolated from mains and PE,

and only connected to the

Dupline®channel generator

and the Dupline®booster

module.

Rated operational voltage through term. 21(+) & 22(-)

20 to 30 VDC (ripple included)

Ripple ≤3 V

Reverse polarity protection Yes

Rated operational current ≤300 mA

Transient protection voltage 800 V

Dielectric voltage

Supply – Dupline®None

Supply - Hi-Line None

Input/Output Specifications

Inputs

Terminals 24(+) & 25(-) Dupline®Bus

Current consumption 2 mA

Max. distance between

channel generator and

GH34850000 50 m

Outputs

Terminals 27(+) & 28(-) Hi-Line Bus

Short-circuit protection Yes

Overload protection Yes

Max. bus load

64 Valve modules

(GH64404412 or GH34404412)

General Specifications

Power ON delay max. 120 sec. (with 64

modules connected)

Indication for

Dupline®carrier in LED, yellow

Hi-Line carrier out LED, yellow

Supply LED, green

Environment

Degree of protection IP20 B

Pollution degree 3 (IEC 60664)

Operating temperature

0° to +50°C (+32° to +122°F)

Storage temperature

-20° to +85°C (-4° to +185°F)

Humidity (non-condensing) 20 to 80%

Dimensions H4- housing

Material Noryl SE1, Grey

Mechanical resistance

Shock 15 G (11 ms)

Vibration 2 G (6 to 55 Hz)

Weight 200 g

GH34850000724

Type: Dupline®

H4-Housing

DC supply

Ordering Key

Du line

Fieldbus Installationbus

2Specifications are subject to change without notice (05.04.2006)

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

GH34850000

Mode of Operation

The purpose of the Dupline

Irrigation Bus System is to

reduce the cost of the wiring

in irrigation systems. By con-

necting the Irrigation Con-

troller with all the valves in the

field via a 2-wire bus, a much

simpler and more flexible

solution is achieved com-

pared to the traditional multi-

core cable with a hot-wire for

each valve. The bus system

enables the Irrigation Con-

troller to control each individ-

ual valve (open/closed) and it

also carries the power

required to operate the

valves, which must be 3-wire

12 VDC latching types. It is

also possible to send infor-

mation from the field to the

Irrigation Controller, e.g. puls-

es from a flow meter. Each

valve must be connected to a

bus I/O-module with 2 digital

outputs (open, close) and 2

digital inputs. The interface

between the Irrigation Con-

troller and the Dupline Master

Module is achieved via serial

communication (RS232 or

RS485) between the two

devices.

The GH34850000724 booster

module increases the voltage

level of the standard Dupline

signal to 28 VDC in order to

achieve sufficient voltage lev-

el to operate the valves. The

diagram below shows the

topology of the system.

Irrigation

Controller

Dupline

Master

Module

Dupline

Booster

Valve +

Flow meter

Valve +

Flow meter

I/O-module I/O-module

Valve +

Flow meter

Valve +

Flow meter

Valve +

Flow meter

I/O-module

I/O-module I/O-module

Valve +

Flow meter

Valve +

Flow meter

RS232/

RS485 Dupline Hi-line

Du line

Fieldbus Installationbus

Specifications are subject to change without notice (05.04.2006) 3

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

System Characteristics

Cable requirements

Min. cable cross-section

1.5 mm2

Shield not required

Twist not required

Free topology

Distance and number

of valves

Max. 64 valves on one line

(128 outputs, 128 inputs)

Up to 7 km communication

distance

There must be min. 10 s

between two valve operations

on the line.

The table below shows the

max. number of valves on

one line as a function of dis-

tance and cross-section of

the cable. The "shaded" cells

are always valid. The un-

shaded cells are based on a

uniform distribution of the

valves and are hence valid

when the average distance

between the valves and the

Hi-Line Booster is below 0.75

of the distance between the

Hi-line Booster and the far-

thest valve.

1 km 2 km 3 km 4 km 5 km 6 km 7 km

1.5 sq.mm 64 64 64 64 64 54 44

2.5 sq.mm 64 64 64 64 64 64 64

12 VDC latching valve

Loss of bus signal

If the valve I/O-module looses the bus signal, it will automatically close the valve.

Wiring Diagram

18765432

21 28272625242322

20 - 30 V

Supply

Input

DUP COM

Dupline

Input

BUS+BUS -

Hi-Line

Output

+ - + - + -

GH34850000

Dimensions (mm)

H4-housing