Summary of Contents for PowerLogic COM128
- Page 1 PowerLogic COM128 ® RS-232 to RS-485 Converter Installation and Operation Guide August 2006...
- Page 3 Conventions Throughout this operation manual, the following methods are used to highlight important information. NOTE Describes 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. WARNING or DANGER Warns you to avoid conditions that could potentially cause serious personal injury and/or equipment damage.
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Page 4: Table Of Contents
Table of Contents COM128 FEATURES ....................1 INTRODUCTION ......................2 Physical Features ..................... 3 RS-232 Panel ......................3 RS-485 Panel ......................3 CONFIGURATION ...................... 4 Configuration Switches ....................4 Mode Descriptions ...................... 4 3.2.1 RS-485 Flow Control ................... 4 3.2.2 Speed Compensation ................. -
Page 5: Com128 Features
COM128 Installation and Operation Manual Schneider Electric COM128 MULTI-PORT RS-232 TO RS-485 CONVERTER FEATURES • Connects one RS-232 line to four RS-485 buses. • Compatible with short-haul modems and line drivers that are powered by the RS-232 line. • Automatic baud rate detection supporting data rates of 1200, 2400, 4800, 9600, and 19200 baud. -
Page 6: Introduction
485 bus to transmit at any given time. provide 750 VDC electrical isolation, and includes transient The COM128 has two ways to determine whether it should be suppression circuitry on its RS-485 ports. transmitting onto the RS-485 buses, or listening to them:... -
Page 7: Physical Features
COM128 Installation and Operation Manual Schneider Electric PHYSICAL FEATURES RS-485 PANEL The RS-485 panel of the COM128 is illustrated in Figure 2.2.1. RS-232 PANEL RS-485 PORTS These four ports connect the COM128 to the four The RS-232 panel of the COM128 is illustrated in Figure 2.1.1. -
Page 8: Configuration
RS-485 ports. No data buffering takes place. Timing can be set for a fixed baud rate or the COM128 is able to do auto- matic baud rate detection on the incoming RS-232 data. Either the DTE or DCE port can be programmed. -
Page 9: Speed Compensation
RS-232 TO RS-485 DATA FLOW the RS-485 port a buffer overflow will occur. The COM128 de- The COM128 detects the start bit, or falling edge, of the first asserts RTS and clears the buffer. byte received by the RS-232 DTE port and sets all 4 RS-485 If CTS is not asserted within 256 byte times after the first byte ports into Transmit mode. -
Page 10: Rs-485 Data Buffering
RS-232 TO RS-485 DATA FLOW COM128 de-asserts the RTS signal and returns to the Idle The COM128 detects the start bit, or falling edge, of the first State. byte received by the RS-232 DTE port and sets all 4 RS-485 When in the RS-485 to RS-232 Data flow state the COM128 ports into Transmit mode. -
Page 11: Installation
An IBM-compatible PC acts as a DTE (Data Terminal Equipment) RS-232 device. Therefore, the computer’s RS-232 The COM128 is shipped with a 9 VDC adapter which plugs port should be connected to the DCE port on the COM128. into the adapter receptacle. Use only the adapter provided Refer to Figure 4.2.2. -
Page 12: Connection To A Modem
If the modem requires RTS-CTS handshaking, the RTS/CTS Flow Control function provided by the COM128 should be enabled. This will 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. -
Page 13: Rs-485 Bus Connections
Note that connections are shown for one RS-485 port only. The CONSIDERATIONS COM128 supports four RS-485 buses simultaneously. The COM128 can exist at any position on the RS-485 bus, including Up to 32 devices can be connected on a single RS-485 bus. The an end point. - Page 14 COM128 Installation and Operation Manual Schneider Electric RS-232 RS-232...
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Page 15: Supplying Power To The Rs-232 Dtr Pin
The COM128 can be configured to support these devices, supplying 5 VDC @ 10 mA to the DTR pin of its DTE or DCE port. To configure the COM128 to supply power on the DTR pin, follow this procedure: Disconnect all power and communications connections to the COM128. - Page 16 COM128 Installation and Operation Manual Schneider Electric RS-232 RS-232...
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Page 17: Technical Specifications
COM128 Installation and Operation Manual Schneider Electric TECHNICAL SPECIFICATIONS ELECTRICAL RATINGS FEATURES Baud Rates Supported: 1200, 2400, 4800, 9600, 19200 Isolation: 750 V between RS-232 and RS- 485 ports RS-232 Ports: One DTE (Male DB9) One DCE (Male DB9) Power Supply:... -
Page 18: Com128 Options
Dimensions in inches except where otherwise indicated. Connections The -IND power supply must be connected to a dedicated fused feed voltage source. The COM128 is connected to the IND supply via the Phoenix 2-pin power supply connector on the COM128 enclosure. Refer to Figure 7.2. - Page 19 COM128 Installation and Operation Manual Schneider Electric Figure 7.2 Connecting the -IND Power Supply COM128 (see specs for for input range) 1A Slo-Blo IND Power Supply...
- Page 20 COM128 Installation and Operation Manual Schneider Electric...
- Page 24 PowerLogic COM 128 Installation and Operation Manual For further assistance please contact us at: Schneider Electric Power Monitoring and Control 2195 Keating Cross Road Saanichton, BC Canada V8M 2A5 Tel: 1-250-652-7100 295 Tech Park Drive, Suite 100 Lavergne, TN 37086...
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