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RS-232

RS-422 INTERFACE CONVERTER

12

T

HE

R

ECEIVER

T

ERMINATION

S

WITCH

This switch is marked S1 on the printed circuit-board diagram in Figures 3-1 and 3-2. This switch serves
to terminate the receiver with pull-up and pull-down resistors in order to designate the receiver state and
enable the Converter’s anti-streaming function. Setting the switch to the ON position closes the switch,
setting the switch to OFF opens the switch.

3.2 LEDs

The RS-232

RS-422 Interface Converter is equipped with seven LEDs located on the front panel that

indicate the status of INPUT signals.

The three LEDs on the right  side of the front panel show conditions on the RS-232 interface: DSR
(Data Set Ready), CTS (Clear To Send), and Data.

The three LEDs on the left side of the panel show the same conditions on the RS-422 interface: DSR
(Data Set Ready), CTS (Clear To Send), and Data.

The LED labeled PWR, located in the center of the front panel, indicates when power is applied to
the unit.

Figures 3-5 and 3-6 illustrate signal flow in both the DTE and DCE configurations.

NOTE

Some LEDs may be lit when no input signal is present. This is not a malfunction, but a
floating state condition at the input that causes the output of that driver to indicate a
positive voltage condition.

Содержание IC456A-R3

Страница 1: ...k Call 724 746 5500 or fax 724 746 0746 Mailing address Black Box Corporation 1000 Park Drive Lawrence PA 15055 1018 Web site www blackbox com E mail info blackbox com CUSTOMER SUPPORT INFORMATION FEBRUARY 1998 IC456A R3 IC456C R3 IC456A R4 IC456C R4 RS 232 RS 422 Interface Converter DSR CTS DATA RR PWR T DSR CTS DATA 232 422 ...

Страница 2: ...ment is operated in a commercial environment Operation of this equipment in a residential area is likely to cause interference in which case the user at his own expense will be required to take whatever measures may be necessary to correct the interference Changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipmen...

Страница 3: ...flujo de aire por los orificios de ventilación 10 El equipo eléctrico deber ser situado fuera del alcance de fuentes de calor como radiadores registros de calor estufas u otros aparatos incluyendo amplificadores que producen calor 11 El aparato eléctrico deberá ser connectado a una fuente de poder sólo del tipo descrito en el instructivo de operación o como se indique en el aparato 12 Precaución d...

Страница 4: ...RS 232 RS 422 INTERFACE CONVERTER 3 TRADEMARKS USED IN THIS MANUAL Any trademarks mentioned in this manual are acknowledged to be the property of the trademark owners ...

Страница 5: ...RS 232 RS 422 INTERFACE CONVERTER 4 Contents Chapter Page 1 Specifications 4 2 Introduction 5 3 Installation 7 3 1 Configuration 7 3 2 LEDs 11 4 Ground Strap and Interface Pinouts 14 ...

Страница 6: ... Port DSR CTS DATA Controls RS 232 port DTE DCE DIP shunts RS 422 port DTE DCE DIP shunts DIP switch to enable receiver termination Environment Storage Temperature 4 to 158 F 20 to 70 C Operating Temperature 32 to 122 F 0 to 50 C Power 115 VAC Supply 10 100 mA 230 VAC Supply 10 50 mA Size Standalone 2 3 H x 8 W x 11 9 D 5 8 x 20 3 x 30 2 cm Rackmount 1 2 H x 7 5 W x 11 4 D 3 1 x 19 1 x 29 cm Weigh...

Страница 7: ...inal equipment DCE to DTE and one for connecting RS 232 modem equipment to RS 422 terminal equipment DCE to DTE Both configurations allow bi directional data transfer Typical applications are shown in Figure 2 1 Things to consider when operating the converter Figure 2 1 Various Applications Showing DCE DTE Settings 4 WIRE CABLE DIP SHUNT SETTINGS INTERFACE CONVERTER PC INDUSTRIAL CONTROLLER T T R ...

Страница 8: ... cases B and A is the scheme the Converter uses However some manufacturers have reversed this scheme Consult the manufacturer of your RS 422 equipment if you have problems Models There are three models of the RS 232 RS 422 Interface Converter IC456A R3 a standalone unit for 115 VAC operation IC456AE R3 a standalone unit for 230 VAC operation IC456C R3 a printed circuit card for rack mounted units ...

Страница 9: ...y after you have configured the Converter s DTE DCE DIP shunts Section 3 1 3 1 Configuration The Converter s RS 232 and RS 422 ports must each be set for DCE or DTE operation Configuration is accomplished through DIP shunts located inside the unit on the printed circuit board see Figures 3 1 and 3 2 One configuration is for connecting RS 422 DCE to RS 232 DTE The second configuration is for connec...

Страница 10: ...ashed Lines show DTE DCE DIP Shunt Locations AC POWER CONNECTOR RS 422 CONNECTOR RS 232 CONNECTOR DIP SHUNTS DIP SHUNTS DSR CTS DATA RS 422 INDICATORS POWER DSR CTS DATA RS 232 INDICATORS XW1A XW2A XW3A XW4A XW4B XW5A XW5B XW1B XW2B XW3B CR8 CR5 CR6 CR10 CR9 CR4 CR7 S1 RACK POWER CONNECTOR ...

Страница 11: ...d through the Converter a modem eliminator is required in order to avoid setting both ports the same If two DCEs are connected together a cross over cable is required S1 OFF ON POWER XW1A XW2A XW3A XW4A XW4B XW5A XW5B XW1B XW2B XW3B CR8 CR5 CR6 CR10 CR9 CR4 CR7 P1 J2 DB37 PIN FEMALE DB25 PIN FEMALE DTE DTE DTE DCE DCE DCE DTE DTE DCE DCE DSR CTS DATA DSR CTS DATA RS 422 TO RS 232 DTR DSR RS 422 TO...

Страница 12: ...gure 3 5 shows the cabling involved Figure 3 4 RS 422 Asynchronous Application PC OR OTHER DTE DEVICE RS 232 RS 422 INTERFACE CONVERTER DIP SHUNT SETTINGS DCE DTE GROUND OPTIONAL RS 422 DEVICE 22 T 4 T 24 R 6 R 19 FRAME GND R R T T GND DB25 STRAIGHT CABLE RS 232 MODEM OR MODEM ELIMINATOR PC RS 232 TERMINAL RS 232 MODEM OR MODEM ELIMINATOR INTERFACE CONVERTER INTERFACE CONVERTER DIP SHUNT SETTINGS ...

Страница 13: ...nt panel that indicate the status of INPUT signals The three LEDs on the right side of the front panel show conditions on the RS 232 interface DSR Data Set Ready CTS Clear To Send and Data The three LEDs on the left side of the panel show the same conditions on the RS 422 interface DSR Data Set Ready CTS Clear To Send and Data The LED labeled PWR located in the center of the front panel indicates ...

Страница 14: ...4 22 Send Data A Send Data B TD 2 CR6 RS 422 DATA LED 6 24 Receive Data A Receive Data B RD 3 CR7 RS 232 DATA LED CD 8 13 31 Receiver Ready A Receiver Ready B TXC 15 5 23 Send Timing A Send Timing B RXC 17 8 26 Receive Timing A Receive Timing B ETXC 24 17 35 Terminal Timing A Terminal Timing B Signal GND 7 19 20 37 Signal GND Receive Common Transmit Common Note The optional jumper is removed facto...

Страница 15: ...4 22 Send Data A Send Data B TD 2 CR6 RS 422 DATA LED 6 24 Receive Data A Receive Data B RD 3 CR7 RS 232 DATA LED CD 8 13 31 Receiver Ready A Receiver Ready B TXC 15 5 23 Send Timing A Send Timing B RXC 17 8 26 Receive Timing A Receive Timing B ETXC 24 17 35 Terminal Timing A Terminal Timing B Signal GND 7 19 20 37 Signal GND Receive Common Transmit Common Note The optional jumper is removed facto...

Страница 16: ...NT TIMING SECONDARY RECEIVED DATA RECEIVER SIGNAL ELEMENT TIMING SECONDARY REQUEST TO SEND DATA TERMINAL READY SIGNAL QUALITY DETECTOR RING INDICATOR DATA SIGNAL RATE SELECTOR DTE TRANSMITTER SIGNAL ELEMENT TIMING RECEIVE COMMON B SEND DATA B SEND TIMING B RECEIVE DATA B REQUEST TO SEND B RECEIVE TIMING B CLEAR TO SEND TERMINAL IN SERVICE B DATA MODE B TERMINAL READY B RECEIVER READY SELECT STANDB...

Страница 17: ...1000 Park Drive Lawrence PA 15055 1018 724 746 5500 Fax 724 746 0746 Copyright 1998 Black Box Corporation All rights reserved ...

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