Black Box IC108A Guia do Utilizador descarregar pdf (Página 36)

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Smart Device (HART

) Interface User’s Guide

Chapter 2 Installation

2-24 3BUR 001 085R0001 REV A

Figure 2-18 shows an example of DSAI 130 board connected to the process with connection

unit DSTA 133. The example illustrates a single channel connection of the transmitter. The

connection unit DSTA 133 has 16 channels, of which eight are intended only for two-wire

transmitter connection and eight are individually adaptable to two-, three- or four-wire

transmitter connection. In all cases, the transmitters can be supplied power via a fuse on

DSTA 133.

Figure 2-19 shows an example of the DSAI 133 board connected to the process with the

connection unit DSTA 002. Use the connection unit DSTA 002 together with DSAI 133 to

connect 16 unipolar, single-ended current or voltage signals. Two DSTA 002, for 32 channels,

are used together with one DSAI 133. You can connect the connection unit to two DSAI 133 for

redundancy. Each channel has a voltage output, protected with a PTC resistor, for transmitter

power.

Figure 2-17. Connection of AI Board DSAI 130 to DSTA 131

PROCESS

CONNECTION UNIT

CONTROLLER

DSTA 131

X90 CH1A

W11

250ohm

CH1B

AI BOARD

DSAI 130

SYMZERO GAIN

F1=0.1A

Smart

Transmitter

Sig+

SHIM

24 Vdc

Pwr. Sup.

4 - 20 mA

External fuse

may be required

if more than 6 smart

transmitters are connected.

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Black Box IC108A Guia do Utilizador Página 36