Black Box ACS201A Uživatelský manuál stáhnout pdf (Strana 6)

Integration Note

Obtaining one of these externally powered converters constitutes the most robust solution to the

problem without special restrictions on the distances of the wires. Some disadvantages of this

solution may be the increased price of the converter and the need for an extra power line on the

installation.

Solution #2

If the currently available converter is to be used then there must be power provided to it. A

voltage of 6–12 volts with respect to SG (pin 5) can be applied to any of the following pins

exclusively:

DTR: pin 4

RTS: pin 7

RI : pin 9

A terminal block with a 9 pin male connector will be ideal for this approach. The RS-232 side of

the BlackBox converter plugs into the block and the TxD, RxD, and ground lines from the ABB

serial cable are connected to the corresponding terminals. In addition a 12 V line should be

connected to the terminal corresponding to pin 4 in order to power the converter. See Figure 7

for a schematic.

Terminal

block

PIn No. Signal

TxD

RxD

DTR

1234

6 7 8 9

1234

6 7 8

RS-422/485 to RS-

232 converter

12V

Self-powerd

converter

ABB Serial Port

female

male

RJ-11 from

DVT

Pin No. Signal

RxD

TxD

DTR

0 V

DSR

RTS N

CTS N

Figure 7: Connections with Current BlackBox Converter

This approach will provide a fast solution with the equipment currently available to DVT users. It

carries almost no extra cost or space and has no special restrictions on the distance of the wires.

A disadvantage of this solution is the need for an extra 12V line on the installation.

1 2 3 4 5 6 7 8 9 10

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