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Siemens COM32, Installation & Operation Manual

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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

RS-485 STRAIGHT-LINE TOPOLOGY

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.

SHLD

Last

RS-485 Device

(End Point)

Last

RS-485 Device

(End Point)

Termination Resistor

See Section 3.2.3.

Computer
or Modem

SHLD

COM32

RS-232C to RS-485 Converter

R

S

-232C

RS

-4

8

5

Computer
or Modem

COM32

RS-232C to RS-485 Converter

R

S

-232C

RS

-4

8

5

SHLD

Summary of Contents for COM32

Page 1: ...COM32 Installation Operation Manual ...

Page 2: ...e 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 IMPORTANT The information contained herein is general in nature and not intended for specifi...

Page 3: ...ith Connection to a Modem 7 2 3 RS 485 Connections 9 General Bus Wiring Considerations 9 Recommended Topologies 9 Straight Line Topology 9 Loop Topology 10 Connection Methods to Avoid 10 3 Power Connections 13 NOPWR No Power Option 13 UNI Option 13 Standards Compliance 14 IND Option 14 Standards Compliance 14 Mechanical and Mounting Dimensions 14 Connections 14 4 Technical Specifications 17 ...

Page 4: ...nsure backward compatibility reliability and easy implementation of both protocols to meet current market communications requirements Siemens therefore reserves the right to make improvements including changes to specifications at any time without notice or obligation ACCESS ISGS Isolated Multi Drop Power Monitor Power Monitor PC SAMMS SAMMS LV SAMMS MV SCOR SEAbus SEAbus Plus SIEServe Static Trip...

Page 5: ...2 device and an RS 485 device there must be some method of controlling whether the RS 232 device listens or transmits onto the bus The COM32 provides two ways of doing this The first is the standard approach of using the RS 232 RTS signal to provide directional control for the COM32 module This works fine provided that the RTS signal is available and the computer software being run on the PC suppo...

Page 6: ...STALLATION 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 ...

Page 7: ...on a PC in a direct connect mode the RTS line of the RS 232 will control the RS 285 data direction The switch settings on the COM32 for direct connection should be as follows SW 1 OFF ignore carrier detect SW 2 ON Automatic Flow Control Refer to Figure 2 1 1 for more information Figure 2 1 1 COM32 Direct Connection to a Computer 2 2 Installation with Connection to a Modem Figure 2 2 1 shows connec...

Page 8: ...rier 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 controls the RS 485 bus or if the RS 485 bus is controlled automatically If the software does not support RTS control or th...

Page 9: ... cable for each RS 485 bus It is recommended that AWG 22 0 6 mm or larger conductor size be used 2 Ensure that the polarity is correct when connecting to the RS 485 port and terminals of each device 3 The shield of each segment of the RS 485 cable must be connected to ground at one end only CAUTION Do not connect ground to the shield at both ends of a segment Doing so allows ground loop currents t...

Page 10: ...g method is illustrated in Figure 2 3a The COM32 can exist at any position on the RS 485 bus One advantage of the loop topology is that a single open circuit fault condition anywhere on the loop will not result in the loss of communication between the computer station and any of the remote devices The loop topology does not require termination resistors at any point on the bus Connection Methods t...

Page 11: ...ted pair Overall length 4000 ft maximum SHLD SHLD SHLD SHLD RT RS 485 STRAIGHT LINE TOPOLOGY 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 SHLD Last RS 485 Device End Point Last RS 485 Device End Point Termination Resistor See Section 3 2 3 Computer or Modem SHLD COM32 RS 232C ...

Page 12: ... RS 485 PORT DO NOT CONNECT 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 COM32 RS 232C to RS 485 Converter RS 232C RS 485 Computer or Modem COM32 RS 232C to RS 485 Converter RS 232C RS 485 SHLD RS 485 STAR CONNECTION RS 485 T CONNECTION ...

Page 13: ...0mA be used The COM32 with this option is supplied with a pair of leads with spade connector terminations which extend form the side of the enclosure see Figure 3 1 1 Figure 3 1 1 NOPWR Option UNI Option The UNI option is a universal power supply that allows the COM32 to be powered from any standard international voltage and frequency Refer to Figure 3 1 4 for more information The table top design...

Page 14: ...icated Refer to Figure 3 1 4 Connections The IND power supply must be connected to a dedicated fused feed voltage source The COM32 is connected to the IND supply using the bare end wires extending from the COM32 enclosure Refer to Figure 3 1 3 for more information Specifications Input Voltage 90 VAC to 264 VAC Input Frequency Range 47 Hz to 440 Hz Protection Internal Fuse Operating Temperature 0 C...

Page 15: ...COM32 INSTALLATION OPERATION MANUAL 15 Power Connections Figure 3 1 2 UNI Option Universal P S Figure 3 1 3 Connecting the IND Power Supply ...

Page 16: ...Power Connections 16 COM32 INSTALLATION OPERATION MANUAL Figure 3 1 4 IND Option Industrial P S ...

Page 17: ...te 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 COM32 with alternate power supply 0 63 kg 1 lb 6 oz Shipping Carton 30 cm x 25 cm x 15 cm 11 8 x 9 8 x 5 9 Features Baud Rates Supported 1200...

Page 18: ...Technical Specifications 18 COM32 INSTALLATION OPERATION MANUAL Figure 4 1 1 COM32 Mechanical Dimensions ...

Page 19: ......

Page 20: ...f 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 access Windows is a trademark and Microsoft is a registered trademark of Microsoft Corporation All others are of Siemens AG Order No XXOM 104 0101 PDF 0101Printed in the U S A ...

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