Siemens COM32 Installation & Operation Manual

Text of Siemens COM32 User Guide:

• Siemens COM32, SUMMARY These instructions do not purport to cover all details or variations in equipment, nor to provide for every possible contingency to be met in connection with installation, operation, or maintenence. Should further information be desired or should particular problems arise which are not covered sufficiently for the purchaser’s purposes, the matter should be referred to the local the sales office. THE CONTENTS OF THIS INSTRUCTION MANUAL SHALL NOT BECOME PART OF OR MODIFY ANY PRIOR OR EXISTING AGREEMENT, COMMITMENT OR RELATIONSHIP. THE SALES CONTRACT CONTAINS ALL OBLIGA- TIONS OF SIEMENS ENERGY & AUTOM

• Siemens COM32, COM32 INSTALLATION & OPERATION MANUAL iii Contents 1 COM32 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 1.1 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2 Installation and Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.1 Installation with Direct Connection to a Computer . . . . . . . . . . . . . 7 2.2 Installation with Connection to a Modem . . . . . . . . . . . . . . . . . . . . 7 2.3 RS-485 Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

• Siemens COM32, iv COM32 INSTALLATION & OPERATION MANUAL Siemens maintains control of all specifications for the SEAbus and SEAbus Plus protocols. A modification to a protocol for any type of device must be approved by Siemens Energy & Automation, Inc. to guarantee compatibility. Any changes made must be backward compatible so that existing products can coexist on the communications bus without having to support the newer features of the protocol Siemens continuously strives to ensure backward compatibility, reliability, and easy implementation of both protocols to meet current market communications requirements. Siemens t

• COM32 INSTALLATION & OPERATION MANUAL 5 COM32 Features 1 COM32 Features ! 1200, 2400, 4800 or 9600 baud operation. ! Full electrical isolation between RS-485 and RS-232 to 500V. ! Works directly with Siemens SCADA software or with other proprietary soft- ware. ! Compact, attractive package. ! May be used with direct computer connection or with modems — switch allows enabling of the rece

• Siemens COM32, COM32 Features 6 COM32 INSTALLATION & OPERATION MANUAL The operational block diagram for the COM32 is provided in Figure 1.1.1. Figure 1.1.2 shows the physical features of the COM32. Figure 1.1.1 COM32 Operational Block Diagram Figure 1.1.2 COM32 Features

• Siemens COM32, COM32 INSTALLATION & OPERATION MANUAL 7 Installation and Operation 2 Installation and Operation 2.1 Installation with Direct Connection to a Computer Since the COM32 device is configured as DCE (data communications equipment) it may be connected directly to the serial port of a standard PC, which will be DTE (data terminal equipment). As shown in Figure 2.1.1, the DB-23 connector on the COM32 unit is connected directly (wires run straight through and do not cross) to the DB-23 connector of the computer. To make the connection between the COM

• Siemens COM32, Installation and Operation 8 COM32 INSTALLATION & OPERATION MANUAL cable is used to make the RS-485 connections to the “Data +” and “Data -” terminals of the COM32. Ensure that the polarity is correct. If the converter is being used to allow the modem to monitor an active RS-485 data loop, the converter must be set to pass data to the modem only after the carrier has been detected, otherwise the modem will not answer. For connection with a modem the switch settings should be as follow: SW-1: ON (wait for carrier detect) Figure 2.2.1 COM32 Configuration Figure 2.2.2 COM32 Connection to a Modem Switch SW-2 controls whether the RTS signal

• Siemens COM32, COM32 INSTALLATION & OPERATION MANUAL 9 Installation and Operation SW-2: OFF (RTS controls the RS-485 bus) SW-2: ON (RTS is not available: the converter uses internal timing to control the RS-485 bus) Refer to Figure 2.2.1 for more information. 2.3 RS-485 Connections RS-485 communications allows multiple devices to be connected on the same bus. Up to 32 devices can be connected on a single RS-485 bus, which consists of a shielded twisted pair cable. The overall length of the RS-485 cable connecti

• Siemens COM32, Installation and Operation 10 COM32 INSTALLATION & OPERATION MANUAL Each end point of the straight-line bus must be terminated with a 1/4 watt resistor. These termination resistors reduce signal reflections which may corrupt data on the bus. Termination resistors are connected between the (+) and (-) terminals of the device at each end of the bus. This device can include either a converter or any other instrument. The value of the resistor should match the line impedance of the cable being used. For AWG 22 shielded twisted pair cable, values between 150 and 300 ohms are typical. Consult the cable

• Siemens COM32, COM32 INSTALLATION & OPERATION MANUAL 11 Installation and Operation Figure 2.3a RS-485 Straight-Line and Loop Topologies SHLD SHLD RS-485 Cable AWG 22 shielded twisted pair. Overall length: 4000 ft. maximum. SHLD SHLD SHLD RS-485 PORT RS-485 PORT SHLD RS-485 PORT SHLD SHLD R T RS-485 Cable AWG 22 shielded twisted pair. Overall length: 4000 ft. maximum. SHLD SHLD SHLD SHLD R T R S -485 S TRAI G HT-LINE T O P O L OG Y RS-485 LOOP TOPOLOGY RS-485 PORT RS-485 PORT RS-485 PORT RS-485 PORT RS-485 PORT RS-485 PORT RS-485 PORT RS-485 PORT RS-485 PORT Termination Resistor See Section 3.2.3. S

• Installation and Operation 12 COM32 INSTALLATION & OPERATION MANUAL Figure 2.3b RS-485 Topologies to Avoid SHLD SHLD SHLD RS-485 PORT RS-485 PORT SHLD RS-485 PORT SHLD RS-485 PORT DO NOT CONNEC T SHLD SHLD RS-485 PORT RS-485 PORT SHLD SHLD RS-485 PORT RS-485 PORT SHLD SHLD RS-485 PORT RS-485 PORT DO NOT CONNECT 3-way star connection point not allowed Computer or Modem COM3

• Siemens COM32, COM32 INSTALLATION & OPERATION MANUAL 13 Power Connections 3 Power Connections The wall adapter should be plugged into a standard 120 VAC outlet. When powered, the TXD and RXD indicators should come on. As data is passed through the converter, the lights will flicker. -NOPWR (No Power) Option A COM32 with the -NOPWR option must be powered by an external source rated between 7VDC and 12VDC. It is recommended that a power supply adapter with an output of 9VDEC at 500mA be used. The COM32 with this option is supplied with a pair of leads with spade connector terminations which extend form t

• Siemens COM32, Power Connections 14 COM32 INSTALLATION & OPERATION MANUAL Standards Compliance The UNI option is CSA, UL, and VDE approved. -IND Option The -IND option is a universal power supply that allows the COM32 to be powered from any standard international voltage and frequency. The power supply is designed for industrial applications where it can be mounted on the wall or door of a cabinet. Standards Compliance The IND option is CSA, UL, and VDE approved. Mechanical and Mounting Dimensions Dimensions in inches except where otherwise indicated. Refer to Figur

• Siemens COM32, COM32 INSTALLATION & OPERATION MANUAL 17 Technical Specifications 4 Technical Specifications N OTE RS-485 port terminals all pass ANSI/IEEE C37.90A-1989 surge withstand and fast transient tests. Electrical Ratings Isolation: 500 V between RS-232 and RS-485 ports Power Supply: Standard 9VDC @ 500 mA (120 VAC adapter supplied) Alternate: 9 VDC @ 500 mA (220 VAC adapter) Operating Temperature: 0°C to 50°C (32°F to 122°F) ambient air Storage Temperature: -30°C to 70°C (-22°F to 158°F) Humidity: 5 to 95 percent, non-condensing Shipping Weight: COM32: 0.24 kg; 8 oz. COM32 with standard

• Siemens Energy & Automation, Inc. Power Management Technologies 3333 Old Milton Parkway Alpharetta, GA 30005 © Siemens Energy & Automation, Inc. Siemens is a registered trademark of Siemens AG. Specifications are subject to change without notice. For Nearest Sales Office 1.800.964.4114 www.sea.siemens.com sales/salesoffices.html For More Information Visit www.sea.siemens.com/ac

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