Delta-controls DPT-2000 Manual do Utilizador descarregar pdf (Página 27)

25 IOM-DPT-A: FEB 2014

14. FIGURES.

Input

circuitmodule

Sensing

system

Power supply/

measurement

min.250

Load resistance

Output

Processor

a/c

Converter

circuit

Modem

Communicator

filter

Noise



Memory

Fig.1. DPT... transmitters – block diagram.

For successful communication with transmitter the resistance in measuring loop, behind connected

device to communication, should be higher than 250Ω. If necessary install the additional resistor in the

line. The communicator or modem connecting ways to the measuring loop are presented at diagrams.

During increasing of resistance in the measure loop at making the good transmission, is necessary to

make sure that the tension falls at sum resistances in the loop don't lower minimum tension at

transmitter terminals. (see p.5.1.).

Electrical connections for DPT... transmitters

Rys. 2a

SIGNAL

240



Power

4÷20 mA

VWX

MNO

DEF

YZ#

5 6

PQR

GHI

8 0

@%&

STU

JKL

ABC

RE PV F4PF

F2 F3 F4

APT2000

Configurator

BELL

202

RS 232

Communicator

Current loop

Switch box

+TEST

-TEST

JUMPER

supply

Fig.2a. The link of transmitter and communicator or modem to current line by the switch box ( in case of the

resistance in current loop is higher than 250Ω).

D-SOFT

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