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PowerLogic

COM128

RS-232 to RS-485 Converter

Installation and Operation Guide

August 2006

Содержание COM128

Страница 1: ...PowerLogic COM128 RS 232 to RS 485 Converter Installation and Operation Guide August 2006...

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Страница 3: ...cribes important considerations related to a device setup feature or application CAUTION Alerts you to a condition which could potentially cause damage to the device or other external equipment WARNIN...

Страница 4: ...4 RS 485DataBuffering 6 3 2 5 Repeater 6 4 INSTALLATION 7 4 1 DCSupplyConnections 7 4 2 RS 232Connection Configuration 7 4 2 1 RS 232Cable 7 4 2 2 Direct Connection to a Computer 7 4 2 3 Connection t...

Страница 5: ...RS 485 transmit enable may be controlled automatically or by the RS 232 RTS line RTS CTS handshaking capability for use with radio modems Compatible with short haul modems and line drivers that are p...

Страница 6: ...COM128 automatically enables the RS 485 transmit mode and begins to transmit onto the RS 485 buses DTEORDCEOPERATION The COM128 is switch selectable to act in DTE or DCE mode An RS 232 port is provide...

Страница 7: ...The RS 485 panel of the COM128 is illustrated in Figure 2 2 1 RS 485 PORTS These four ports connect the COM128 to the four RS 485 buses Four pluggable 3 pin terminal blocks are provided STATUS INDICA...

Страница 8: ...COM128 to the DCE device For applications where a DTE device uses the RS 232 RTS signal for flow control the COM128 can be programmed to use the RTS signal to control the RS 485 ports SW2 SW1 SW3 SW4...

Страница 9: ...the RS 232 DTE port the COM128 de asserts the RTS signal and returns to the Idle State If CTS is not asserted after 256 bytes have been received from the RS 485 port a buffer overflow will occur The C...

Страница 10: ...FF ON RS 485 Data Buffering with 20 mSec transmission delay after RTS assertion DTE 9600 ON OFF OFF ON OFF ON RS 485 Data Buffering with 50 mSec transmission delay after RTS assertion DTE 9600 OFF ON...

Страница 11: ...to the corresponding terminals of the removable 2 pin terminal block connector supplied with the COM128 See Chapter 2 Figure 2 1 1 4 2 RS 232CONNECTIONS CONFIGURATION Sections 4 2 2 and 4 2 3 discuss...

Страница 12: ...force the COM128 to buffer all RS 485 data received until the modem is ready to receive the data Most radio modems require this mode as do some telephone modems Refer to your modem s operation manual...

Страница 13: ...connected as shown in Figure 4 3 2 4 3 3 RECOMMENDEDTOPOLOGIES Devices on an RS 485 bus are connected in a point to point configuration with the and terminals of each device connected to the associate...

Страница 14: ...T A DCE PORT DTE PORT COM128 RS 232 to RS 485 Converter RS 232 RS 485 R T RS 485 Cable AWG 22 shielded twisted pair Overall length 4000 ft maximum Last RS 485 Device End Point Last RS 485 Device End P...

Страница 15: ...int on the RS 485 bus no more than two 2 cables should be con nected Thisincludesconnectionpointson instruments converters andterminalstrips Followingthisguidelineensuresthatstar andteeconnectionsarea...

Страница 16: ...ORT A DCE PORT DTE PORT COM128 RS 232 to RS 485 Converter RS 232 RS 485 Computer or Modem RS 485 STAR CONNECTION RS 485 PORT RS 485 PORT SHLD SHLD RS 485 PORT SHLD RS 485 PORT DO NOT CONNECT SHLD SHLD...

Страница 17: ...1220 F ambient air Storage Temperature 300 C to 700 C 220 F to 1580 F Humidity 5 to 95 percent non condensing Shipping Weight 0 9 kg 2 lbs 0 oz Carton 30 x 25 x 18cm 11 8 x 9 8 x 5 9 5 25 133mm 5 25...

Страница 18: ...be valid the IND power supply must be installed in accor dance with all local electrical codes and standards and must not be user accessible duringnormaloperation MechanicalandMountingDimensions Dimen...

Страница 19: ...COM128 InstallationandOperationManual SchneiderElectric 15 COM128 IND Power Supply AC L AC N FG see specs for for input range 1A Slo Blo Figure 7 2 Connecting the IND Power Supply...

Страница 20: ...COM128 InstallationandOperationManual SchneiderElectric 16 Figure 7 2 1 IND Option Industrial P S...

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Страница 24: ...8 EQI 31 rue Pierre Mend s France F 38050 Grenoble C dex 9 Tel 33 0 4 76 57 60 60 Getting technical support Contact your local Schneider Electric sales representative for assistance or go to the www p...