COM32 Installation & Operation Manual
DANGER ElectricaI equipment contains hazardous voltages and high speed moving parts. Can cause death, serious injury or property damage. See safety instruction contained herein. Restrict use to qualified personnel. The use of unauthorized parts in the repair of the equipment or tampering by unqualified personnel will result in dangerous conditions that can cause death, serious injury or property damage.
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.
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.
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 software. ! Compact, attractive package. ! May be used with direct computer connection or with modems — switch allows enabling of the receive by carrier detect option. ! RS-485 transmit enable may be controlled automatically or by the RS-232 RTS line.
COM32 Features 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.
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.
Installation and Operation 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.
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 connecting all devices cannot exceed 4000 ft. (1219 m).
Installation and Operation 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.
Installation and Operation RS-485 STRAIGHT-LINE TOPOLOGY Last RS-485 Device (End Point) RS-485 PORT COM32 RS-485 PORT RS-485 PORT SHLD SHLD SHLD RS-232C to RS-485 Converter SHLD RS-485 Cable RT AWG 22 shielded twisted pair. Overall length: 4000 ft. maximum. RS-485 RS-232C Computer or Modem Termination Resistor See Section 3.2.3. Last RS-485 Device (End Point) RS-485 PORT RS-485 PORT RS-485 PORT SHLD SHLD SHLD RT Termination Resistor See Section 3.2.3.
Installation and Operation RS-485 STAR CONNECTION 3-way star connection point not allowed RS-485 PORT RS-485 PORT SHLD SHLD COM32 RS-232C to RS-485 Converter RS-485 PORT RS-485 PORT SHLD RS-485 RS-232C Computer or Modem DO NOT CONNECT SHLD RS-485 PORT RS-485 PORT SHLD SHLD RS-485 T-CONNECTION RS-485 PORT SHLD COM32 RS-485 PORT RS-485 PORT SHLD SHLD SHLD RS-232C to RS-485 Converter RS-232C Computer or Modem RS-485 SHLD RS-485 PORT DO NOT CONNECT SHLD Figure 2.
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.
Power Connections Specifications Input Voltage: 90 VAC to 264 VAC Input Frequency Range: 47 Hz to 440 Hz Protection: Internal Fuse Operating Temperature: 0°C to 40°C (32°F to 104°F) Storage Temperature: -40°C to 85°C (-40°F to 185°F) 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.
Power Connections Figure 3.1.2 -UNI Option (Universal P/S) Figure 3.1.
Power Connections Figure 3.1.
Technical Specifications 4 Technical Specifications 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 power supply: 0.47 kg; 1lb.
Technical Specifications Figure 4.1.
Siemens Energy & Automation, Inc. Power Management Technologies 3333 Old Milton Parkway Alpharetta, GA 30005 For Nearest Sales Office 1.800.964.4114 © Siemens Energy & Automation, Inc. Windows is a trademark and Microsoft is a registered trademark of Microsoft Corporation. All others are of Siemens AG. Siemens is a registered trademark of Siemens AG. Specifications are subject to change without notice. www.sea.siemens.com sales/salesoffices.html For More Information Visit www.sea.siemens.
