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Summary of Contents for KTI Networks KSC-240
- Page 1 Industrial RS-232 to RS-485/422 Converter KSC-240 Installation Guide DOC.070412-KSC-240...
- Page 2 (C) 2006 KTI Networks Inc. All rights reserved. No part of this documen- tation may be reproduced in any form or by any means or used to make any directive work (such as translation or transformation) without per- mission from KTI Networks Inc.
- Page 3 The information contained in this document is subject to change without prior notice. Copyright (C) All Rights Reserved. TRADEMARKS Ethernet is a registered trademark of Xerox Corp. FCC NOTICE This device complies with Class B Part 15 the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received including the interference that may cause.
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Page 4: Table Of Contents
Table of Contents 1. Introduction ............5 1.1 Features ..................6 1.2 Specifications ................7 2. Installation ............12 2.1 Unpacking ..................12 2.2 Safety Cautions ................13 2.3 DIN-Rail Mounting ............... 14 2.4 Panel Mounting ................16 2.5 Applying Power ................18 2.6 Power Failure Relay Output ............ -
Page 5: Introduction
1. Introduction The industrial converter is designed to convert RS-232 signals to opti- cally isolated, balanced, full or half-duplex RS-422 or RS-485 signals at baud rate up to 115.2Kbps. It features RTS control design, which allows software to control RS-485 transmission. With smart ADC (Auto Data Control) design, the converter can uses send data signal to control RS- 485 transmission automatically so no software control is required in RS-... -
Page 6: Features
1.1 Features Supports RS-232 baud rate up to 115.2Kbps Operation with no required configuration Provides surge protection (transient voltage) on all interface lines Provides high ESD protection on all line signals Optical isolated between RS-232 and RS-485/422 interfaces Supports RS-422, 2-wire RS-485, and 4-wire RS-485 network Supports full-duplex or half-duplex for RS-485/422 interface Provides remote RTS control for RS-485 transmission Provides ADC... -
Page 7: Specifications
1.2 Specifications This figure shows the important components of the device:... - Page 8 Serial Interface (RS-232 Port) Connector DB9 female Pin Assignments DCE type Baud Rate Support Up to 115K baud Connector Shield Connect to chassis ground Connection Distance 15 meters High ESD Tolerance +/-15KV on Tx, Rx lines Overvoltage Protection Cutoff if over +/-28V Isolation Optical isolation with RS-485/422 interface RS-485/422 Interface...
- Page 9 Configuration DIP SW Settings Name State Function SW1-2&1 4W 4-wire (RS-485/422 driver receiver separated) 2-wire (RS-485/422 driver receiver connected) SW1-3 T -D Disable RS-485/422 receiver terminator T -E Enable RS-485/422 receiver terminator SW1-4 RS-485/422 driver enable control by RTS or ADC RS-485/422 driver is forced to enable SW1-5 RTS-D Off...
- Page 10 DC Power Interface Interface Screw-type terminal block 1. Two pairs for power wire cascading 2. One pair for power failure relay output DC Jack (-D6.3mm/+D2.0mm) Operating Input Voltages +7V ~ +30V(+5%) Power consumption 0.6W @+7.5VDC, 12VDC, 30VDC input Basic Information Conversion RS-232 RX data to RS-485/422 TX data RS-485/422 RX data to RS-232 TX data...
- Page 11 Certificate Part 15 Class B CE/EMC EMI EN50081-1 Class B EMS EN55024 CE/LVD Safety EN 60950 EN 50081-1/1992 : EN55022:1994/A1:1995/A2:1997 EN61000-3-2:2000 EN61000-3-3:1995/A1:2001 EN 55024:1998/A1:2001 IEC 61000-4-2:1995 ESD Test IEC 61000-4-3:1995 RS Test IEC 61000-4-4:1995 EFT/BURST Test IEC 61000-4-5:1995 Surge Test IEC 61000-4-6:1996 CS Test IEC 61000-4-8:1993...
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Page 12: Installation
2. Installation 2.1 Unpacking Check that the following components have been included: • Information CD • The device unit • DIN-rail mounting bracket If any item is found missing or damaged, please contact your local reseller for replacement. The following are available optional accessories: •... -
Page 13: Safety Cautions
2.2 Safety Cautions To reduce the risk of bodily injury, electrical shock, fire, and damage to the equipment, observe the following precautions. • Do not service any product except as explained in your system documentation. • Opening or removing covers may expose you to electrical shock. Only a trained service technician should service components inside these compartments. -
Page 14: Din-Rail Mounting
2.3 DIN-Rail Mounting In the product package, a DIN-rail bracket is installed on the device for mounting the converter in a industrial DIN-rail enclosure. The steps to mount the device onto a DIN rail are: 1. Install the mounting bracket onto the device unit as shown below: 2. - Page 15 The final mechanical dimensions after installing DIN rail mounting bracket are: -15-...
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Page 16: Panel Mounting
2.4 Panel Mounting The device is provided with an optional panel mounting bracket. The bracket support mounting the device on a plane surface securely. The mounting steps are: 1. Install the mounting bracket on the device unit. 2. Screw the bracket on the device unit. 3. - Page 17 The screw locations and final dimension are shown below: -17-...
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Page 18: Applying Power
2.5 Applying Power The power specifications of the device are: Operating Voltage +7 ~ +30VDC Power Consumption Max. 0.6W @+30VDC, +12VDC, +7.5VDC The device provides two types of power interfaces, terminal block and DC power jack for receiving DC power input from external power supply. Using Terminal Blocks Either DC1 interface or DC2 interface can be used to receive DC power from an external power system. - Page 19 Power wires: 24 ~ 12AWG (IEC 0.5~2.5mm Install the power source wires with the plug properly. Screw the wire with plug securely. Then, plug in DC1 contacts. If cascading the power to next device is needed, install the power wires and plug for another switch.
- Page 20 Using DC Power Jack DC Jack Connector: Jack D 6.3mm D 2.0mm AC Power Adapters: Optional commercial rated adapters are available for purchasing. Rated AC120V/60Hz DC7.5V 1A Rated AC230V/50Hz DC7.5V 1A Rated AC100V/50-60Hz DC7.5V 1A Rated AC240V/50Hz DC7.5V 1A Connect power adapter DC plug to the DC power jack of the converter before connecting to the AC outlet.
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Page 21: Power Failure Relay Output
2.6 Power Failure Relay Output The device provides a relay output to report power failure event to a remote alarm monitoring system. The replay output is provided with two contacts labeled PF+ and PF- in the terminal block interface. Use the provided 2P terminal plug for signal wiring and plug into the PF+/ - contacts. -
Page 22: Dip Sw Configuration
2.7 DIP SW Configuration SW1-2 & 1 4-wire (RS-485/422 driver receiver separated) 2-wire (RS-485/422 driver receiver connected) [2W] setting activates the internal connection between driver and re- ceiver in RS-485/422 interface. It simplifies the installation of the con- verter in a 2-wire bus. RS-422 usually uses 2-wire topology only. RS-485 supports both 2-wire and 4-wire topology. - Page 23 SW1-3 Disable RS-485/422 receiver terminator T -E Enable RS-485/422 receiver terminator [T-E] setting enables the internal 120 ohms terminator on the receiver interface. A proper termination is important in a bus topology or multi- drop network. The terminator is a resistor added in parallel with the receiver's "A"...
- Page 24 SW1-4 TXC RS-485/422 driver enable control by RTS or ADC TXE RS-485/422 driver is forced to enable [TXC] setting enables RS-485/422 driver to be controlled by RTS method or ADC method. RTS method is described later. Refer to SW2 settings for more description about ADC method.
- Page 25 SW1-5 RTS-D Disable RTS control for RS-485/422 driver RTS-E Enable RTS control for RS-485/422 driver RTS control method allows the connected RS-232 device (such as a PC) to control RTS signal (CTS input at the converter end) by software to enable or disable RS-485/422 driver.
- Page 26 SW1-8&7 BIAS-D RS-485/422 receiver line bias is disabled BIAS-E RS-485/422 receiver line bias is enabled The line bias is used to maintain the proper idle-state voltage to the idle condition (when no driver is enabled on the bus). These bias resistors are pull-up resistors on the data B line and pull-down resistors (to ground) on data A line.
- Page 27 SW2-1 SDD Disable ADC control for RS-485/422 driver Enable ADC control for RS-485/422 driver ADC method involves special circuitry that senses when data is received on the RS-232 interface and is being transmitted and automatically en- ables the RS-485/422 driver as well as disabling the driver within one character length of the end of transmission.
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Page 28: Rs-485/422 Driver And Receiver Control
2.7.1 RS-485/422 Driver and Receiver Control The following table lists the possible DIP SW settings related to RS-485 and RS-422 driver and receiver control: SW1-4 SW1-6 SW1-5 SW2-1 Behavior RTS-D Driver is enabled. Receiver is disabled. Driver is enabled. Receiver is enabled. RTS-D Driver is disabled. -
Page 29: Making Serial Rs-232 Connection
2.8 Making Serial RS-232 Connection Typical RS-232 Interface DCE Pin Assignment Table P i n # Signal Name Input/Output Received Line Signal Detect Output TX Data Output RX Data Input DTE Ready Input Signal Ground Output DCE Ready Output Clear To Send Input Request To Send Output... - Page 30 The RS-232 to RS-485/422 converter as an interface between an RS-232 device and RS-485 or RS-422 bus. The connection is illustrated as fol- lows: The following signals received on the RS-232 interface are converted to RS-485 bus signals: Pin# Signal Name Input/Output TX Data Output...
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Page 31: Cable For Connection To Pc Com Port
2.8.1 Cable for Connection to PC COM Port Connecting to 9-pin DTE device (Computer or PC COM) Connecting to 25-pin DTE device (Computer or PC COM) -31-... -
Page 32: Making Rs-485/422 Connection
3 Making RS-485/422 Connection EIA-485 [TIA-485] Balanced (differential) interface; defines the Physical layer, signaling protocol is not defined. EIA-485 specifies bidirectional, half-duplex data transmission. Up to 32 transmitters and 32 receivers may be interconnected in any combination, including one driver and multiple receivers (multi-drop), or one receiver and multiple drivers. -
Page 33: Rs-422 Point-To-Point Circuit
RS-485 and RS-422 are in wide use as an interface for telecommunica- tions, industrial, medical, security and networking applications. The fol- lowing sections describe examples of some of popular physical topologies. 3.1 RS-422 Point-to-Point Circuit This is the simplest configuration, just one driver and one receiver. If termination is used, it is only required at the receiver. -
Page 34: Rs-422 Multi-Drop Network
It also can convert an RS-232 device into a receiver node in this point-to- point circuit. The configuration for a RECEIVER node is: SW1-4 Enable RTS/ADC Control for Driver SW1-6 Enable Receiver always SW1-5 RTS-D Disable RTS control SW2-1 Disable ADC control 3.2 RS-422 Multi-drop Network In this topology there is only one driver sending to one or more receiv- ers. - Page 35 The converter can convert an RS-232 device into a Master node in this multi-drop network. The configuration for MASTER node is: SW1-4 Enable Driver always SW1-6 Enable Receiver RTS/ADC Control SW1-5 RTS-D Disable RTS control SW2-1 Disable ADC control It also can convert an RS-232 device into a SLAVE node in this multi-drop network.
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Page 36: Rs-485 Multi-Drop Network
3.3 RS-485 Multi-drop Network This topology is similar to RS-422 multi-drop. However, up to 32 receiv- ers are permitted under RS-485. This may be used for point-to-multipoint communications. The converter can convert an RS-232 device into a Master node in this multi-drop network as illustrated below: The configuration for MASTER node is: SW1-4... - Page 37 It is also able to convert an RS-232 device into a SLAVE node in this multi- drop network. The configuration for a SLAVE node is: SW1-4 Enable RTS/ADC Control for Driver SW1-6 Enable Receiver always SW1-5 RTS-D Disable RTS control SW2-1 Disable ADC control -37-...
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Page 38: Rs-485 Half-Duplex 2-Wire Network
3.4 RS-485 Half-duplex 2-wire Network This is the typical RS-485 topology. It takes advantage of RS-485 capabil- ity to support multiple drivers on a bus. RS-422 devices should not be used in this configuration. This topology enables bidirectional communi- cation from many nodes over long distances at low to medium data rates, all on a single pair of wires (2-wire). -
Page 39: Rs-485 Full-Duplex 4-Wire Network
The converter features RS-485 driver and receiver in one device. It also provides very flexible configuration settings for Driver Enable control and Receiver Enable control. The configuration for the node in RS-485 2- wire network is: SW1-2&1 2W Select 2-wire topology SW1-4 Enable RTS/ADC Control for Driver SW1-6... - Page 40 The master node may drive its bus while any of the slave nodes are driving the lower pair, making this 4-wire network a full-duplex communi- cation channel. All communication occurs from master to slave or slave to master, so any peer to peer communications must be routed through the master node.
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Page 41: Summary Of The Converter Applications
3.6 Summary of the Converter Applications The common topologies implemented with RS-485 and RS-422 are: 1. RS-422 point to point in 2 -wire circuit 2. RS-422 2-wire multi-drop network 3. RS-485 2-wire multi-drop network 4. RS-485 half-duplex bidirectional network in 2-wire topology 5. -
Page 42: Led Indicators
4 LED Indicators The following figure shows the locations of the LED indicators: 4.1 LED Indicators DISPLAY STATE INTERPRETATION Power status The device is powered on. The device is powered off. 232 TX RS-232 TX RS-232 TX data is present No RS-232 TX data 232 RX RS-232 RX... -
Page 43: Factory Default Configuration
5 Factory Default Configuration The following table lists the factory default settings for configuration DIP SW: Name Default Setting SW1-2&1 4W 4-wire (RS-485/422 driver receiver separated) SW1-3 T-D (Off) Disable RS-485/422 receiver terminator SW1-4 TXC (Off) RS-485/422 driver enable control by RTS or ADC SW1-5 RTS-D (Off) Disable RTS control for RS-485/422 driver SW1-6...
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