Black Box IC1473A-F Bedienungsanleitung

IC1473A-F 703 p1 / 2 5852

Port Powered RS-232 to RS-422 Converter,

DB9F to Terminal Block

Product Code IC1473A-F

The unit is a port-powered two-channel RS-232 to RS-422 converter. It converts TD and RD RS-232

lines to balanced RS-422 signals. The converter can be powered from the RS-232 handshake lines, DTR

and RTS. If port-powering the unit, at least one of these handshake lines must be present, but can be in

any state. It can also be powered externally on the terminal blocks. The RS-422 driver and receiver are

always enabled.

To satisfy the requirements of some software packages, the RS-232 handshake lines are looped

back (tied together). RTS is connected to CTS, and DTR is connected to DSR and DCD.

Connections

This model is configured to transmit both directions between an RS-232 and RS-422 system. The

RS-232 side is pinned out to connect directly into the COM port on your computer or any other DTE

device (Table 1). Connections to the RS-422 side of the converter are made through terminal blocks.

When connecting to an RS-422 system, the converter must be connected with the proper polarity as

shown in Figure 1. When no data is being sent and the driver enabled, the RS-232 line is negative and

the RS-422 line TD(A) is negative with respect to TD(B).

Table 1 - RS-232 Pin Out

Figure 1 - Connection to a RS-422 System

TD(B)+

RD(A)-

RD(B)+

GND

TD(A)-

GND

RD(A)-

TD(A)-

RD(B)+

TD(B)+

422PP9TB

terminal blocks RS-422

Biasing Resistors

The biasing resistors for the RS-422/RS-485 receiver are 4.7k Ohm resistors. These resistors are

labeled R1 and R2 (See Figure 2).

Black Box Corporation - 1000 Park Drive - Lawrence, PA 15055-1018

Tech Support and Ordering: 724-746-5500 - Fax: 724-746-0746

To contact us about Black Box products or services: [email protected]

Signal DB-9 Female Pin #

TD 3

RD 2

RTS 7

CTS 8

DTR 4

DSR 6

DCD 1

GND 5

Converter

Terminal Block

IC1473A-F 703 p2 / 2 5852

Figure 2

DCD

GND

R2 4.7k

TD(B)+

TD(A)-

RD(B)+

RD(A)-

GND

+5V

CTS

DTR

DSR

RTS

Circuit

Power

Conversion

4.7k

+12VDC

RS-232

DB9 female

RS-422

terminal blocks

Specifications

Communication: RS-422

Data Rate: 115.2 kbps max.

Power: Port-powered from handshake lines on the RS-232 side, or 12 to 16 VDC at 40

mA on the terminal blocks.

Dimensions: 3.5 x 1.3 x 0.7 in (8.9 x 3.3 x 1.7 cm)

Temperature Rating: 0 to 70°C

NOTE: When using an external supply, the supply should be connected only to specifically

labeled power inputs (power jack, terminal block, etc.). Connecting an external power supply to

the handshake lines may damage the unit. Contact technical support for more information on

connecting an external power supply to the handshake lines.

Black Box Corporation - 1000 Park Drive - Lawrence, PA 15055-1018

Tech Support and Ordering: 724-746-5500 - Fax: 724-746-0746

To contact us about Black Box products or services: [email protected]

Model Number: IC1473A-F

Description: 9-Pin Port-Powered RS-422 Converter

Type: Light industrial ITE equipment

Standards: EN 50082-1 (IEC 801-2, IEC 801-3, IEC 801-4)

EN 50081-1 (EN 55022, IEC 1000-4-2)

EN 61000 (-4-2, -4-3, -4-4, -4-5, -4-6, -4-8, -4-11)

ENV 50204

EN 55024

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