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1. Table 4 CAC5 3 wire OAS1 Settings SILBUS TERMINATION UNIT 15 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 A 28 a L ZS CAC6 Cable Typical Setup 2 Wire System OAS1 BEG Potentiometer fully clockwise minimal resistance SW1 OFF SW2 OFF SW3 OFF SW4 OFF SW5 OFF OAS1 END Potentiometer fully clockwise minimal resistance SW1 ON SW2 ON SW3 ON SW4 OFF SW5 OFF Table 5 CAC6 2 wire OAS1 Settings SILBUS TERMINATION UNIT 16 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 T aug EE CAC6 Cable Typical Setup 3 Wire System OAS1 BEG Potentiometer fully clockwise minimal resistance SW1 OFF MORE OFF SW3 OFF SW4 OFF SW5 OFF OAS1 END WIRE 1 Potentiometer fully clockwise minimal resistance SW1 ON SW2 ON SW3 ON SW4 OFF SW5 OFF OAS1 END WIRE 2 LANYARD Potentiometer fully clockwise minimal resistance SW1 OFF SW2 ON SW3 ON SW4 OFF SW5 OFF Table 6 CAC6 3 wire OAS1 Settings SILBUS TERMINATION UNIT 17 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 A 28 a L ZS CAC7 Cable Typical Setup 2 Wire System OAS1 BEG Potentiometer fully clockwise minimal resistance SW1 OFF SW2 OFF SW3 OFF SW4 OFF SW5 OFF OA2. PROTECTIVE EARTH BEG 7 EARTH GREEN YELLOW PROTECTIVE EARTH BEG 8 LANYARD YELLOW BEG 11 MONITOR RED BEG END 14 COMMON BLACK BEG END NOTE 1 FITTED TO SILBUS OAS1 END BUT NOT USED IN TAIL END APPLICATIONS Table 9 Termination unit connection details Q 1 SIGNAL LANYARD 8 MONITOR 110 SIGNAL MONITOR 11 TERMNATION UNIT TERMNATION UNIT TYPE SILBUS OAS1 BEG TYPE SILBUS OAS1 END 3 COMVON COMVON 14 COMVON 14 7 Q 6 EARTH Q 7 EARTH2 Figure 7 SILBUS OAS1 XXX terminal diagram SIG__ 1 seat LANYARD 8 2 _ _LANYARD NOTE MONITOR ac 1 MONITOR SIGNAL SIGNAL MONITOR 11 SIGNAL__ TO CHANNEL TOFIELD GENERATOR TERMNATION UNIT NETWORK TERMNATON UNIT FROM FIELD TYPE SILBUS OAS1 BEG TYPE SILBUS OAS1 END NETWORK DM gt 3 comvoNn COMMON 14 COMON COVWON 14 1 COMMON 6 EARTH1 2 7 EARTH2 NOTE 1 LANYARD ONLY REQUIRED IN THREE WIRE SYSTEMS EARTH EARTH Figure 8 Typical connection diagrams SILBUS TERMINATION UNIT 20 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 l s austdac i 6 1 EARTH CONNECTIONS The SILBUS OAS1 BEG has two earth connection terminals 6 7 these terminals must be connected independently to a low impedance lightning earth point using a minimum of 4mm conductors These conductors shall be as short as possible and twists and bends should be avoided if proper lightning protection is to be afforded The two earth conductors should be segregated from all other panel w
3. a SILBUS network There is no configuration required for the lightning protection part of the SILBUS OAS1 BEG The termination unit needs to be configured to provide just the correct amount of termination load to absorb the reflections without adding any additional load that may stop long system networks from operating correctly due to IxR losses S austdac Photograph 3 Termination switch and potentiometer SILBUS TERMINATION UNIT 13 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 gt austdac E CAC5 Cable Typical Setup 2 Wire System OAS1 BEG Potentiometer fully clockwise minimal resistance SW1 OFF MORE OFF SW3 OFF SW4 OFF SW5 OFF OAS1 END Potentiometer fully clockwise minimal resistance SW1 ON SW2 ON SW3 ON SW4 OFF SW5 OFF Table 3 CAC5 2 wire OAS1 Settings SILBUS TERMINATION UNIT 14 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 T aug EE CAC5 Cable Typical Setup 3 Wire System OAS1 BEG Potentiometer fully clockwise minimal resistance SW1 OFF MORE OFF SW3 OFF SW4 OFF SW5 OFF OAS1 END WIRE 1 Potentiometer fully clockwise minimal resistance SW1 ON SW2 ON SW3 ON SW4 OFF SW5 OFF OAS1 END WIRE 2 LANYARD Potentiometer fully clockwise minimal resistance SW1 ON SW2 ON SW3 ON SW4 OFF SW5 OFF
4. as lightning protection for head end control panels while the SILBUS OAS1 END only provides network termination and test facilities The termination unit is housed within a DIN rail mounting enclosure measuring 45mm W x 75mm H x 110mm D The front panel is located between the two top of enclosure mounted terminal blocks to provide easy access to the two test points 2 FRONT PANEL LAYOUT The termination front panel is located between the terminal blocks that form part of the enclosure The front panel has two 2mm test points spaced at 19mm that provide test access to the SILBUS signal and common signals The front panel is shown in photograph 1 below Jes austdac d austdac A Ap SIL BUS HI SIL BUS SILBUS TERMINATION UNIT TYPE SILBUS OAS1 END SILBUS TERMINATION UNIT TYPE SILBUS OAS1 BEG Photograph 1 SILBUS OAS1 XXxX front panel layout SILBUS TERMINATION UNIT 4 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 The front panel can be snapped out and removed by using a wide bladed flat screw driver to gain access to the configuration potentiometer and switch Photograph 2 below shows the front panel removed and the location of the configuration potentiometer and switch The two test sockets are also shown Photograph 2 Access to configuration switch and potentiometer 3 THEORY OF OPERATION SILBUS or Dupline is an extremely reliable and noise tolerant system that is in most cases tolerant of unterminat
5. delay of 200us While additional capacitance helps attenuate the reflection it can add delay due to slew rate Figure 4 Near end waveform showing the effect of high capacitance on slew rate 3 2 PRACTICAL INSTALLATIONS In practice the installations will vary considerable from the ideal situation The following describes the effect of various installations 3 2 1 SHORT CABLE RUN Short cable runs of less than 4km require good termination of the cable as the unterminated cable will generate a strong reflection as there is in sufficient cable attenuation or capacitance to suppress the reflection In these cases the OAS1 is used to terminate the cable as well as adding capacitance with the OAS1 to attenuate the driving end reflection 3 2 2 LONG CABLE RUN Long cable runs of 4km or more generally have less reflection issues as the attenuation of the cable and added capacitance of the cable tends to suppress the reflection In many cases it may not be necessary to use an OAS1 However it is still recommended that an OAS1 be used to terminate the cable however a lower capacitance value in the OAS1 should be used to reduce the effect on slew rate SILBUS TERMINATION UNIT 8 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 l y austdac i 3 2 3 MULTIPLE WIRE SYSTEM Multiple wire systems such as a 3 wire system increase the capacitance on the cable due to capacitive addition It is recommended
6. that the OAS1 is used to terminate each wire unless a high capacitance cable is used The capacitance value of the OAS1 needs to be reduced to compensate for the cable capacitance Because of the typical use of a 3 wire system there may be times when one of the wires is open circuited This disconnects the OAS1 on that line This may lead to reflections due to the loss of termination Ideally the isolation switch should switch in a termination at the break to maintain transmission line operation 3 2 4 HIGH CAPACITANCE CABLES As discussed previously if the cable and OAS1 capacitance is high the slew rate of the signal will be affected This slew rate will affect the maximum length of the cable that can be used 3 2 5 SILBUS LOADS SILBUS loads acts as partial termination loads and can affect the final setting of the OAS1 Generally the greater the number of loads the lower the need for the OAS1 3 3 LIGHTNING PROTECTION The SILBUS OAS1 BEG provides lightning protection in the form of semiconductor clamping and gas discharge tube clamping with diversion to earth Further protection is provided by common mode and differential inductive isolation A high speed semiconductor clamp between the signal and common lines will clamp any differential lightning induced voltages to approximately 22 volts This clamp is backed up by a differential and common mode three terminal gas discharge device that shunts lightning induced energy away to earth Lig
7. 8 Table 8 CAC7 3 wire OAS1 Gettnge EEN 19 Table 9 Termination unit Connection details 20 FIGURES Figure 1 Near end and far end waveforms with no termination CAC 7 6 Figure 2 Near end and far end waveforms with termination CAC7 and 150R 100nF 7 Figure 3 Near end and far end waveforms with termination CAC7 and 150R 300nF 7 Figure 4 Near end waveform showing the effect of high capacitance on slew rate sssssseeeeeesss 8 Figure 5 Three wire conveyor termination and control panel lightning protection 10 Figure 6 Two wire conveyor termination and control panel lightning protection 11 Figure 7 SILBUS OAS1 XXX terminal dagram ENEE 20 Figure 8 Typical connection dagrams ue 20 SILBUS TERMINATION UNIT 3 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 austdac Si i Bx ii 1 GENERAL DESCRIPTION The SILBUS termination unit type SILBUS OAS1 XXX is an explosion protected DIN rail mounting module that is used to provide a SILBUS network termination SILBUS test points and head end lightning protection Typically a termination unit is required at both ends of a SILBUS network or transmission line to help stop reflections and ringing in the SILBUS waveform The SILBUS OAS1 XXX is produced in two versions the SILBUS OAS1 BEG for the head end and the SILBUS OAS1 END for the tail end of the SILBUS network The SILBUS OAS1 BEG provides network termination test facilities as well
8. CAL ING TALEATIONS geet 8 9 2 1 SHORT CABLE RUN EE 8 3 2 2 LONG CABLE RUN EE 8 3 2 3 MULTIPLE WIRE SYSTEM ecescenicrectrceerercetccteccrtiarneresidnesteseeai tener etotieenis 9 3 2 4 HIGH CAPACITANCE CABLES E 9 3 2 5 SILBUS LOADS ee e E E E E EEe 9 3 3 LIGHTNING PROTECTION RE 9 4 TYPICAL APPLICATIONS eeseeereseseeeeeeeedege dese ege ege eege ee 10 4 1 THREE WIRE CONVEYOR EE 10 4 2 TWO WIRE CONVEYOR eege ae eE E ene em eink 11 SOPERATING INSTRUCTIONS eebe 11 6 CONFIGURATION E 13 TERMINATIONS AND CONNECTIONS cccccccceeeeeeeeeeeeeeeeeeeeeeeeeeeeeceaeeeeeeecaeeeeeseeaeeeesseneeeeeseaes 20 6 EAR TH CONNEC TIOING EE 21 EEN 21 PHOTOGRAPHS Photograph 1 SILBUS OAS1 XXX front panel Javout eee eect eee eee eeeene eee e etree teeeeaaeeeeeeeeeeteeee 4 Photograph 2 Access to configuration switch and potentomeier 5 Photograph 3 Termination switch and potentiometer sssessssssssesrrrrrtreserrrrrnnerrsrrrrnrrnnnnnserennne 13 TABLES Table 1 Test facility connection details eier 11 Table 2 DIP Switch Setting lt isrcortssnesenciaierdutentssivatsrbsevantsnanscesaiendnucevanecesmbercnlsaxanaseebandsaserandsumsentts 12 Table 3 CAC5 2 wire OAS1 ZSEEtHEIEEeeegeteseeg denger tgCe esgeECESed Ee ETEEuere Gage ege EEN eer 14 Table 4 CACS5 3 wire OAS1 Gettnge NEEN EEN 15 Table 5 CAC6 2 wire eu CN 16 Table 6 CAC6 3 wire e Eu CC 17 Table 7 CAC 2 wire OAS1 Sein S siciscccesecsivcesicssnsineorciscsetsimcereesturaresbineerenviecerstelnrarecdmearnsumeenets 1
9. NUAL Issue 02
10. S1 END Potentiometer fully clockwise minimal resistance SW1 ON SW2 OFF SW3 OFF SW4 ON SW5 OFF Table 7 CAC7 2 wire OAS1 Settings SILBUS TERMINATION UNIT 18 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 T aug EE CAC7 Cable Typical Setup 3 Wire System OAS1 BEG Potentiometer fully clockwise minimal resistance SW1 OFF MORE OFF SW3 OFF SW4 OFF SW5 OFF OAS1 END WIRE 1 Potentiometer fully clockwise minimal resistance SW1 ON SW2 OFF SW3 OFF SW4 ON SW5 OFF OAS1 END WIRE 2 LANYARD Potentiometer fully clockwise minimal resistance SW1 OFF SW2 OFF SW3 OFF SW4 ON SW5 OFF Table 8 CAC7 3 wire OAS1 Settings SILBUS TERMINATION UNIT 19 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 ll i TERMINATIONS AND CONNECTIONS e austdac All connections to the termination unit are via cage clamp terminals around the perimeter and near the front of the DIN rail mounting enclosure these terminals can accommodate up to 4mm 11awg conductors There are seven possible connections to the termination unit these are shown in the following tables and diagrams 1 SIGNAL RED SILBUS SIGNAL CONTROL PANEL BEG 3 COMMON BLACK SILBUS COMMON CONTROL PANEL BEG 6 EARTH GREEN YELLOW
11. S1 END does not provide any lightning protection The individual transmitters distributed along the conveyor should also be protected against lightning if required SILBUS TERMINATION UNIT 10 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 il wR austdac if 4 2 TWO WIRE CONVEYOR 1 SIGNAL LANYARD8 MONITOR 1 11 SIGNAL MONITOR TO CHANNEL GENERATOR AND REMAINDER TERMINATION UNIT OF PANEL TYPE SILBUS OAS1 BEG TERMINATION UNIT TYPE SILBUS OAS1 END COMMON 3 COMMON COMMON14 6 EARTH1 7 EARTH2 EARTH EARTH 14COMMON HEAD END CONTROL PANEL TAIL END UNIT Figure 6 Two wire conveyor termination and control panel lightning protection A two wire conveyor control system would be terminated and protected in much the same way as the three wire conveyor except that the lanyard conductor would not be used and terminal 8 on the SILBUS OAS1 BEG would not be used 5 OPERATING INSTRUCTIONS The termination unit does not require any operator action to operate once it has been installed within an IP54 host enclosure and configured correctly Test connection facilities are provided on the front panel of the termination unit to provide a method of connecting test equipment to the network while the system is in operation Care should be exercised when using these test facilities to not short the SILBUS network and cause tripping of conveyor drive motors
12. and similar plant TERMINATION UNIT TEST FACILITY CONNECTIONS i FRONT PANEL NAME COLOUR NETWORK SIGNAL TERMINAL No SIG RED SIGNAL 11 COM BLACK COMMON 14 Table 1 Test facility connection details The test facilities are in the form of two 2mm test sockets spaced at 19mm These test sockets will accept standard multimeter probes and leads The potentiometer in the OAS1 can be used to match the characteristic impedance of the cable The potentiometer can be used to adjust the termination resistance from 100 ohms to 600 ohms Turning the potentiometer fully clockwise sets it to 100 ohms Turning the potentiometer fully counter clockwise sets it to 600 ohms Note that the potentiometer is a multi turn unit SILBUS TERMINATION UNIT 11 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 r austdac A The DIP switch settings are as follows Switch Function 1 Turns ON the termination circuits 2 Sets capacitance to 47nF 3 Sets capacitance to 100nF 4 Sets capacitance to 220nF 5 Sets capacitance to 330nF Combinations of switch 2 to 5 can be used for higher capacitance Table 2 DIP Switch Setting SILBUS TERMINATION UNIT 12 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 ll Sa 6 CONFIGURATION The termination switch and potentiometer require configuration or setup when the SILBUS OAS1 XXX is installed on
13. e signal quality can be seen In the waveform below the same cable has been terminated with a 150ohms in series with 100nF However as the GSW1 source impedance is lower than the cable impedance some reflections are still evident SILBUS TERMINATION UNIT 6 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 Channel 1 yellow signal at near end of cable GSW1 end Channel 2 green signal at far end of cable Termination 150R 100nF Figure 2 Near end and far end waveforms with termination CAC7 and 150R 100nF By adding capacitance to the line this forms a low pass filter which attenuates the reflection due to the GSW1 source impedance mismatch In the waveform below the same cable has been terminated with a 150ohms in series with 300nF Channel 1 yellow signal at near end of cable GSW1 end ge Channel 2 green signal at far end of cable Termination 150R 300nF Figure 3 Near end and far end waveforms with termination CAC7 and 150R 300nF SILBUS TERMINATION UNIT 7 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 LR S austdac i Ii The additional factor that must be taken into account is the overall delay of the SILBUS signal The delay is due to both the length of the cable and the slew rate of the signal The GSW1 Build 1 can tolerate a delay of 110us and the GSW1 Build 2 can tolerate a
14. ed networks but some installations due line length branches and system architecture require line termination to function reliably 3 1 TRANSMISSION LINE The SILBUS signal on a cable follows the principles of transmission line theory If a transmission line is not terminated correctly at its end points reflections can occur that will cause ringing on the SILBUS waveform This ringing can cause the channel generator to misinterpret the channel pulse low period and falsely decide that a channel is on when it is not By correctly terminating the ends of a SILBUS network transmission line the ringing can be eliminated or significantly reduced to a point where it will not cause any incorrect operation of the SILBUS system SILBUS TERMINATION UNIT 5 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 S austdac Pre ll i The waveform below shows both the near end and far end waveforms on an unterminated cable Strong reflections can be seen at both the falling edge and rising edge of the waveform Reflections ee T T Near end Far end E APEE EE E E E E il 2P H d l Reflections i d U Channel 1 yellow signal at near end of cable GSW1 end Se Channel 2 green signal at far end of cable No termination Figure 1 Near end and far end waveforms with no termination CAC7 If the cable is terminated in the correct impedance a significant improvement in th
15. htning induced energy is typically very high frequency so inductive filters are used to isolate the control panel terminals of the SILBUS OAS1 BEG from high energy spikes It is for this same high frequency that any wiring from the earth terminals of the SILBUS OAS1 BEG must be carried out in a low inductive manner failure to do so will render the SILBUS OAS1 BEG ineffective in reducing damage from lightning induced energy SILBUS TERMINATION UNIT 9 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MANUAL Issue 02 austdac 4 TYPICAL APPLICATIONS 4 1 THREE WIRE CONVEYOR 11 SIGNAL MONITOR TERMINATION UNIT TYPE SILBUS OAS1 END 14COMMON LANYARD LANYARD8 MONITOR MONITOR 11 SIGNAL MONITOR TO CHANNEL GENERATOR AND REMAINDER OF PANEL TERMINATION UNIT TYPE SILBUS OAS1 BEG TERMINATION UNIT TYPE SILBUS OAS1 END COMMON 3 COMMON COMMON14 Q Q 14 COMMON 6 EARTH1 Q7 EARTH2 EARTH EARTH HEAD END CONTROL PANEL TAIL END UNIT Figure 5 Three wire conveyor termination and control panel lightning protection The figure above shows how the SILBUS OAS1 BEG and two SILBUS OAS1 END can be used to correctly terminate a three wire conveyor control system to prevent ringing and resultant interference with the SILBUS signal waveform The SILBUS OAS1 BEG also provides lightning protection to the conveyor control panel The SILBUS OA
16. iring to reduce any induction of lightning derived energy into signal conductors within the control panel If the lightning earth point is far away from the control panel then an earth stud or terminal shall be provided on the control panel gear tray to allow the earth conductors to be increased to 8mm 7 SPECIFICATIONS NAMG eeii riea E EA EA E EREE E NEE E EEE Termination unit HK TEE SILBUS OAS1 BEG and SILBUS OAS1 END Terminations ociniecacicincetcrdurcentc maidens eeawieicears eae Cage clamp 4mm 11awg maximum SIZE ee dE EES 45mm W x 75mm H x 110mm D Ee 145g EE TS35 DIN rail or screw mount M4 on 85mm x 61mm centres Ingress protection E IP20 eu EE Polycarbonate 30 GV UL 94 V 1 EE RAL 7032 Grey Terminal material wcinciseriectocsseiscaiemsonntears creieiw ieestemstecineesemtenlteeanens Polycarbonate UL 94 V 2 Terminal block Colour aia cece ecercan eanees te eseae eee astenteen attest eneae seman este en boadeadtaestucndnets Black Operating temperature range wiiascevincerecvinesscesinverdeviweastesierareceiwestavinwertsetmeareiviweentias 0 C to 40 C Storage temperature range EEN 20 C to 80 C Operating relative humidity range s ssnsseeesssseserrnnessserrrrrrnneeseee 10 to 90 Non condensing Maximum clamping voltage BEG On sssscssiciesicsiesdstseinisrernineesaisineeneesimearesvincenteacereraaeneas 22V Maximum impulse current 8 20uS BEG only ENNEN 5kA SILBUS TERMINATION UNIT 21 OF 21 120 339 12 TYPE SILBUS OAS1 USER S MA
17. x RER Title SILBUS TERMINATION UNIT TYPE SILBUS OAS1 USER S MANUAL Document Number 120 339 12 Issue Kaz austdac TERMINATION UNIT Gg SIL BUS OAS1 BEG D e SiG 1 OF 21 R austdac Aj REVISION CONTROL 02 Add settings table 2012 08 20 JY JY CG 01 Original 2010 01 18 PB PB JY Issue Details Date Written Designed Approved Austdac Pty Ltd Unit 1 4 Packard Avenue Castle Hill NSW 2154 Australia PO Box 6486 Baulkham Hills Business Centre NSW 2153 Australia Phone 61 2 8851 5000 Fax 61 2 9899 2490 Website www austdac com au Austdac Inc 455 Lowries Run Rd Pittsburgh PA 15237 USA Phone 1 888 254 9155 Fax 1 412 635 0179 Copyright 2010 01 18 This document remains the property of Austdac Pty Ltd It is subject to its recall and must not be reproduced in part or whole or its contents divulged to third parties without prior written approval from Austdac Pty Ltd 120 339 12 SILBUS TERMINATION UNIT 2 OF 21 Issue 02 TYPE SILBUS OAS1 USER S MANUAL R austdac P TABLE OF CONTENTS FE VISION CONTROL sasstecestvandsccetetvc tracgsacbtemaeriueee ca tecenn aeciaed Generates eee eens 2 EECH CONTENTS cepcsrse sc tcecietdrcideric tetera titieg intern cee neato acid ceed te eee 3 e lge 3 TABLES EE 3 FIGURES EE 3 1 GENERAL DESCRIPTION E 4 2 FRONT PANEL LAYOUT eege ee Eeer 4 3 THEORY OF OPERATION E 5 3 1 NEE el 5 3 2 PRAGTI
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