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-1- Industrial RS-232 to RS-485/422 Converter KSC-240 Installation Guide DOC.070412-KSC-240.
-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. KTI Networks Inc.
-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.
-4- T a ble of Contents 1. Introduction ......................................................... 5 1.1 Features ........................................................................................ 6 1.2 Specifications ............................
-5- 1. Introduction The industrial converter is designed to convert RS-232 signals to opti- cally isolated, bala nced, full or half-duplex RS-422 or RS-485 signals at baud rate up to 1 15.2Kbps. It features R TS control de sign, which allows software to control RS-485 tra nsmission.
-6- 1.1 Fe ature s Supports RS-232 baud rate up to 115.2Kbps Operation with no required configuration Provides sur ge protection (tra nsient voltage) on all interfa ce lines Provides h.
-7- 1.2 Specifications This figure shows the importa nt components of the device:.
-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 Dista nce 15 meters High ESD T .
-9- Configuration DIP SW Settings SW Na me State Function SW1-2&1 4W O f f 4-wire (RS-485/422 driver receiver separated) 2W O n 2-wire (RS-485/422 driver receiver connected) SW1-3 T -D O f f Disab.
-10- DC Power Interface Interface Screw-type terminal block 1. T wo pairs for power wire ca sca ding 2. One pair for power failure relay output DC Jack (-D6.
-11- Certificate F C C Part 15 Class B CE/EMC EMI EN50081-1 Class B EMS EN55024 CE/L V D Safet y E N 60950 EN 50081-1/1992 : EN55022:1994/A1:1995/A2:1997 EN61000-3-2:2000 EN61000-3-3:1995/A1:2001 EN 5.
-12- 2. In stallation 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.
-13- 2.2 Safety Cautions T o reduce the risk of bodily injury , electrical shock, fire, a nd da mage 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.
-14- 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 .
-15- The final mecha nical di mensions after installing DIN rail mounting bra cket are:.
-16- 2.4 Pa nel Mounting The device is provided with a n optional pa nel mounting bracket. The bra cket support mounting the device on a pla ne surfa ce securely . The mounting steps are: 1 . Install the mounting bracket on the device unit. 2 . Screw the bracket on the device unit.
-17- The screw locations a nd final di mension are shown below:.
-18- 2.5 Applying Power The power specifications of the device are: Operating V oltage + 7 ~ +30VDC Power Consumption M ax. 0.6W @+30V DC, +12V DC, +7.5V DC The device provides two types of power interfaces, terminal block and DC power ja ck for receiving DC power input from external power supply .
-19- Power wires: 24 ~ 12A W G (IEC 0.5~2.5mm 2 ) Install the power source wires with the plug properly . Screw the wire with plug securely . Then, plug in DC1 conta cts. If cascading the power to next device is needed, install the power wires and plug for another switch.
-20- Using DC Power Ja ck 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.
-21- 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 a nd plug into the PF+/ - contacts.
-22- 2.7 DIP SW Configuration SW1-2 & 1 4W 4-wire (RS-485/422 driver receiver separated) 2W 2-wire (RS-485/422 driver receiver connected) [2W] setting activate s the internal connection between driver a nd re- ceiver in RS-485/422 interface. It simplifies the installation of the con- verter in a 2-wire bus.
-23- SW1-3 T- D Disa ble RS-485/422 receiver terminator T- E Ena ble RS-485/422 receiver terminator [T -E] setting ena bles the internal 120 ohms terminator on the receiver interfa ce. A proper termination is i mporta nt in a bus topology or multi- drop network.
-24- SW1-4 T X C RS-485/422 driver ena ble control by R TS or ADC T X E RS-485/422 driver is f orced to ena ble [TXC] setting ena bles RS-485/422 driver to be controlled by R TS method or ADC method. R TS method is described later . Refer to SW2 settings for more descri ption a bout ADC method.
-25- SW1-5 R TS-D Disa ble R TS control for RS-485/422 driver R TS-E E n a ble R TS control for RS-485/422 driver R TS control method allows the connected RS-232 device (such a s a PC) to control R TS signal (CTS input at the converter end) by software to ena ble or disa ble RS-485/422 driver .
-26- SW1-8&7 BIAS-D RS-485/422 receiver line bi as is disa bled BIAS-E RS-485/422 rece iver line bia s is ena bled The line bias is used to maintain the proper idle-state voltage to the idle condition (when no driver is ena bled on the bus).
-27- SW2-1 S D D Disa ble ADC control for RS-485/422 driver S D E Ena ble ADC control for RS-485/422 driver ADC method involves special circuitry that senses when data is received on the RS-232 interf.
-28- 2.7.1 RS-485/422 Driver a nd Re ce iver Control The following ta ble lists the possible DIP S W settings related to RS-485 a nd RS-422 driver a nd rece iver control: SW1-4 SW1-6 SW1-5 SW2-1 Behavior TX E R XC R TS-D SDD Driver is ena bled. Receiver is disa bled.
-29- 2.8 Ma king Serial RS-232 Conne ction T ypical RS-232 Interfa ce DCE Pin Assignment T a ble Pin# Signal Na me Input/Output 1 Received Line Signal Detect Output 2 TX Data Output 3 RX Data Input 4 .
-30- The RS-232 to RS-485/422 converter as a n interfa ce between a n RS-232 device a nd RS-485 or RS-422 bus. The connection is illustrated a s fol- lows: The following signals received on the RS-232.
-31- 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).
-32- 3 Ma king RS-485/422 Connection EIA-485 [TIA-485] Bala nced (diff erential) interfa ce; defines the Physical layer , signaling protocol is not defined.
-33- RS-485 a nd RS-422 are in wide use a s a n interface f or telecommunica- tions, industrial, medical, security a nd networking a pplications. The f ol- lowing sections describe examples of some of popular physical topologies. 3.1 RS-422 Point-to-Point Circuit This is the si mplest configuration, just one driver a nd one rece iver .
-34- It also ca n convert a n RS-232 device into a receiver node in this point-to- point circuit. The configuration for a RECEIVER node is: SW1-4 T XC En a ble R TS/ADC Control f or Driver SW1-6 R X E E na ble Receiver always SW1-5 R TS-D Disa ble R TS control SW2-1 S DD Disa ble ADC control 3.
-35- The converter ca n convert a n RS-232 device into a M a ster node in this multi-drop network. The configuration for MASTER node is: SW1-4 T X E E na ble Driver always SW1-6 R X C En a ble Receive.
-36- 3.3 RS-485 Multi-drop Network This topology is si milar 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.
-37- It is also a ble to convert a n RS-232 device into a SLA VE node in this multi- drop network. The configuration for a SLA VE node is: SW1-4 T XC E na ble R TS/ADC Control for Driver SW1-6 R X E E.
-38- 3.4 RS-485 Half-duplex 2-wire Network This is the typical RS-485 topology . It takes a dva ntage of RS-485 capa bil- ity to support multiple drivers on a bus.
-39- The converter features RS-485 driver a nd receiver in one device. It also provides very flexible configuration settings f or Driver Enable control a nd Receiver Ena ble control.
-40- The master node may drive its bus while a ny of the slave nodes are driving the lower pair , making this 4-wire network a full-duplex communi- cation cha nnel. All communication occurs from master to slave or slave to ma ster , so a ny peer to peer communications must be routed through the master node.
-41- 3.6 Summary of the Converter Application s The common topologies i mplemented with RS-485 a nd 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.
-42- 4 LED Indicators The following figure shows the locations of the LED indicators: 4.1 LED Indicators LED DISPLA Y ST A TE INTERPRET A TION P W R Power status O N The device is powered on.
-43- 5 Fa ctory Default Conf iguration The following ta ble lists the fa ctory default settings f or configuration DIP SW : SW Name Default Setting SW1-2&1 4W 4-wire (RS-485/422 driver receiver se.
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