SM-9278 - Ansaldo STS
Contents
1. SM 9278 Original August 2005 Page iii Table of Contents UNION SWITCH 8 SIGNAL iv SM 9278 Original August 2005 UNION SWITCH 8 SIGNAL Introduction 1 Introduction This service manual provides installation and operation information for Union Switch amp Signal s shelf mounted family of solid state biased code following track relays Figure 1 1 These relays provide a solid state option for customers with existing electromechanical track relays Table 1 1 cross references the US amp S solid state shelf mounted relays to the US amp S electromechanical CD style cookie jar packaged relays Table 1 2 presents a list of considerations to be evaluated when using these solid state relays The solid state CD style relay is a code following relay comprised of two circuit boards one control board and one output or contact board containing the solid state switches The two boards are housed in a W400 style enclosure The connections to a unit are made via standard AAR terminals available through the top of the unit On the output board one solid state switch is used as the front contact and one is used as a back contact for each of the four sets of contacts All of the switches are normally open devices therefore to emulate a back contact it is necessary to apply steady energy to one set of terminals on the upper terminal block to enable the back contact switches Applying energy to another set of terminals activates the f2. 1 1 Application Considerations Other than the obvious difference that a steady energy supply must be used to replicate operation of an electronic code following relay ECFR to its electromechanical code following relay EMCFR counterpart there are differences that need to be considered that relate to safety The differences between the ECFR and EMCFR are presented in Table 1 2 1 1 1 Overcoming Contact Dependence In some safety critical applications a vital relay is steady energized proving that the EMCFR is following code The general way in which this is accomplished is illustrated in its simplest form in Figure 1 2 A snub on AFP and ABP delays drop out for sufficient time so that AFP and ABP remain steadily energized as long as A is following code When coding stops either AFP or ABP drops as does AP This technique is valid with EMCFR s because a front and back cannot simultaneously be closed This technique is not valid for the ECFR because the contacts are independently driven and can be simultaneously closed The contacts are not independently driven The same function can be accomplished with an ECFR in one of two ways as shown in Figure 1 3 Circuit A of Figure 1 3 uses a single transfer contact and diodes to achieve a voltage negative with respect to N12 Circuit B accomplishes the same function with marginally better efficiency using two transfer contacts In either case AP will energize when A is following the code It is a vital
3. BEE EE OE N OE EE N EE OR EN EN EE EIE 3 1 3 1 Relay WING EE del eee EA aan ae EE ER OR EA 3 2 4 Operatiom Testing ir EE Ee va Oe kkk Talaia EE a aid EE Be ee ee ga aaa Bee eek Ge a 4 1 4 1 Bl AE Me AE RR ER OE N eee 4 1 4 2 Test Procedure ik ER EE De eb oe ER ES Ee Ad PERE Ee oe ge eed ete elated ida ie eee 4 1 5 Technical S pp ort i HTHH 5 1 List of Figures Figure 1 1 Typical Shelf Mounted Code Following Relay ii sese eee 1 1 Figure 1 2 Steady Energized Relay EMCERI sese ee seene nnn nner nnn nner ee ee ke ee ee ke ee ee Re ee ee na 1 4 Figure 1 3 Independent Contacts with ECFR asses essere sese ereer ee ee ee ke ee ee ee be ee ee ee ke ee ee ee be ee ee ee ke ee ee ee ke ee ee ee Re ee ee na 1 5 Figure 3 1 Overall Dimensions of the Solid State Code Following Track Relay sse eee ee AR ee ee 3 1 Figure 3 2 External Connections for the Shelf Mounted Track Relay 3 2 Figure 4 1 Test Fixture for the Solid State Code Following Track Relay sese eee 4 2 List of Tables Table 1 1 Cross References for Solid State Electromechanical CDP Relays 6 emtnui 1 2 Table 1 2 Differences in Application of EMCFR and ECFR Relays iese ee ee ee ee ee se ee ee ee ee ee ee ee Re ee ee ee ee ee 1 3 Table 2 1 Specifications for the Solid State Code Following Track Relay eee eee 2 1 Table 4 1 Relay Pickup Current sis ES SE ge See oe se de Ee Gee es de Re de GRA Ede daa de DS RA Ed ke ed se vait ee 4 1
4. There is no wear out mechanism and therefore no degradation of performance regardless of code rate and contact loading For High Voltage Only In cab signal applications the point of circuit interruption occurs at the zero crossing resulting in less harmonic noise generation than would otherwise occur For those applications wherein the code follower is repeating ON OFF switching from a code generator the ECFR is a superior device 1 2 Glossary Coded Energy The signal that activates alternate closure of the front and back contacts The voltage applied to the relay so that the contacts alternately switch when coded energy is applied Steady Energy SM 9278 Original August 2005 1 3 Introduction UNION SWITCH 8 SIGNAL a AFP ABP Figure 1 2 Steady Energized Relay EMCFR SM 9278 Original August 2005 UNION SWITCH 8 SIGNAL Introduction CIRCUIT A ECFR B12 y AP A A Lt LO a _ t y N12 e CIRCUIT B B12 ECFR a ts VW aid AA v A N12 o Figure 1 3 Independent Contacts with ECFR SM 9278 Original August 2005 1 5 UNION SWITCH 8 SIGNAL Introduction 1 6 SM 9278 Original August 2005 UNION SWITCH 8 SIGNAL Eguipment Description 2 Eguipment Description 2 1 Contacts and Current Ratings The relay is for low voltage
5. applications and an AC DC switch is provided The load rating 1s 2 5 amperes per contact up to 30 volts DC and 22 Vrms Low voltage contacts are protected up to 34 volts and are short circuit protected Breakdown voltage across a normal reverse contact set is limited by the surge protection ratings of 34 VDC for low voltage contacts 2 2 Isolation for Biased Solid State Relays The steady power source and coded inputs are isolated by 1000Vrms Contacts and inputs are isolated from each other and the frame the withstand voltage is 1500Vrms Breakdown voltage across a front back contact set is limited by the surge protection ratings of 34V 2 3 Voltage Requirements The operating voltage for the steady energy input of the relay is 8 to 16 VDC Ripple must be limited so that the instantaneous voltage does not drop below 8 volts Table 2 1 Specifications for the Solid State Code Following Track Relay Parameter Value Operating Voltage 8 to 16 VDC can not drop below 8 VDC Hold Current 0 06 to 2 5 Amps Voltage 12 to 230 Vrms Up to 230 volts Contacts are NOT short Contact Protection circuit protected External fusing is required for short circuit protection Contact Load Rating Operating Temperature Range 40 C to 70 C Height 9 25 Overall Dimensions Width 4 56 Length 6 0 SM 9278 Original August 2005 2 1 Eguipment Description UNION SWITCH 8 SIGNAL SM 9278 Original August 2005 UNION SWITCH 8
6. mechanism that ensures AP will deenergize when A is not following the code It overcomes the problem inherent with ECFRs that shorting of front and back contacts together is a possibility The circuit elements to duplicate these circuits are packaged on a PC board that is compatible with relay rack mounting The one for the GRS B1 relays is part number N39903801 and the one compatible with 1 2 SM 9278 Original August 2005 UNION SWITCH 8 SIGNAL Introduction the US amp S shelf mounted style relays is N39903701 The N39903701 module is rack mountable in a PN 150 form factor Table 1 2 Differences in Application of EMCFR and ECFR Relays Recommendation or EMCFR ECFR Comment Calibration Pick Up and Drop Away are Pick up and Drop Away are Calibration is performed at determined by the force primarily determined by current the factory during generated by a magnetic sensing devices for which there is manufacturing using structure and the restraining no implied guarantee that it will electronic devices that forces of contact springs never change These devices should not need further and or magnets It is implied have proven highly repeatable adjustment These relays that pick up and drop away are but calibration should not be are designed to operate in thus assured regarded as absolute the range of their electromechanical counterparts Contact Contacts are driven bya Contacts are independent A Do NOT use an ECFR in an Depende
7. SIGNAL 3 Installation Installation The shelf mounted solid state relays may be installed either on a horizontal shelf or mounted to a panel and installed in an eguipment rack The shelf mounted relays do no use index plates The dimensions for installing the relay are presented in Figure 3 1 jt 4 56 gt A F F E O O O O O O OO OD O 0 0 0 O Y i J R 53 La 3 5 53 La gt 63 2 25 gt 63 La A 54 1 3 MAR A k S A Y ZA A A ME A EN AA AE 25 R ET EE n EE ENE R i io A Sl 2 8 2 B p E y io k sd gt 28 DIA HOLE lt dr Figure 3 1 Overall Dimensions of the Solid State Code Following Track Relay SM 9278 Original August 2005 Installation UNION SWITCH 8 SIGNAL 3 1 Relay Wiring For the shelf mounted solid state relay the coded and steady energy inputs are connected to AAR terminals on the top of the unit Positive coded energy is wired to terminal Coded and negative coded energy is wired to terminal Coded Positive steady energy is wired to terminal 12 Steady and negative steady energy is wired to terminal 12 Steady see Figure 3 2 9 STEADY i e o e 6 CODED oo dd Figure 3 2 External Connections for the Shelf Mounted Track Relay Viewed from the Top of t
8. UNION SWITCH amp SIGNAL Union Switch amp Signal Inc an Ansaldo Signal company 1000 Technology Drive Pittsburgh PA 15219 e 645 Russell Street Batesburg SC 29006 SM 9278 Shelf Mounted Solid State Vital Biased Code Following Track Relay N40700408 N40700409 US amp S Part No Installation Operation Copyright 2005 SM 9278 August 2005 Union Switch amp Signal Inc Original UNION SWITCH 8 SIGNAL Proprietary Notice This document and its contents are the property of Union Switch Signal Inc hereinafter US amp S This document has been furnished to you on the following conditions no right or license under any patents or any other proprietary right in respect of this document or its content is given or waived in supplying this document This document or its content are not to be used or treated in any manner inconsistent with the rights of US amp S or to its detriment and are not to be copied reproduced disclosed to others or disposed of except with the prior written consent of US amp S Important Notice US amp S constantly strives to improve our products and keep our customers apprised of changes in technology Following the recommendations contained in the attached service manual will provide our customers with optimum operational reliability The data contained herein purports solely to describe the product and does not create any warranties Within the scope of the attached manual it is impo
9. e coded input When the lamps L1 L2 L3 and L4 illuminate and the lamps L5 L6 L7 and L8 become dark the relay has picked up 4 The pickup voltage reading for the relays should be in accordance with Table 4 1 5 If the relay fails the test US amp S recommends returning the relay to their Batesburg SC facility for repair Table 4 1 Relay Pickup Current Relay Part Number Pickup Current Range N40700408 0 60A to 0 78A N40700409 0 60A to 0 78A SM 9278 Original August 2005 4 1 UNION SWITCH 8 SIGNALJIS Operation Testing o t gt TO1F T A Ei T1 o L2 TO 2F NY To 120Vac Line j o L3 TO SE Vo TO AF con Cots TO 1B EOR TO 2B 12V T o LT 12V LM317K Test Jacks C1 TOE VOLTAGE KM i NE REGULATOR 5 ohm 4 TO 4B 1 5A min 1 SW2 GND 10W A 1 CASE D TO 1H E 2 10uF ka Al OOo TOH 240 35V L R1 10W GND ohms TO 3H GND Lo TO4H T1 Transformer 120 V AC TO 12 V AC 2 Amperes or better 12V L1 L8 LAMPS Chicago Miniature P N 1891 1892 or 1893 TO TOSTEADY or similar and holders gt TO CODED D1 Bridge Rectifier 100Volt 5 Ampere SW1 SPST Switch TO STEADY C1 100uF 50V Capacitor GND TO CODED F1 120V 3A Fuse and Holder i R1 2K Potentiometer Clarostat 73JB2K or similar GND LM317K Voltage Regulator Figure 4 1 Test Fixture for the Solid State C
10. he Relay 3 2 SM 9278 Original August 2005 UNION SWITCH 8 SIGNAL Operation Testing 4 Operation Testing 4 1 Operation Operation of the shelf mounted solid state code following track relays is identical to the electro mechanical styles A break before make characteristic is built into the electronics and the delay is approximately 1ms 4 2 Test Procedure No periodic testing or adjustment is necessary There are no calibration procedures or adjustments that are required for the solid state shelf mounted relays Testing a solid state relay differs slightly from testing an electromechanical relay A minimum operating voltage replaces the pick up calibration Testing consists of energizing the relay s steady input with 12 volts DC and then setting the pickup current An AC source is used to indicate contact closure To test the shelf mounted relay connect it to a test fixture wired as shown in Figure 4 1 1 Turn on the AC power by closing SW1 Lamps L5 L6 L7 and L8 should be illuminated When the relay is under power steady input the back contacts are connected 2 Connect a digital voltmeter set to measure DC volts across the test jack terminals Close switch SW2 3 Slowly increase the current by turning the potentiometer while observing the voltage reading Because the voltage reading is taken across a 1Q resistor it translates directly into a current reading Hence a reading of 1 Volt indicates 1 Ampere flowing into th
11. nce common element and shorted contact analogous to application where dependent Inductive Load Switching therefore a welded contact will prevent opposite state contacts from conducting Preferred practice in switching inductive load relays is to snub the load to prevent arching EMI and contact corrosion one that is welded will not inhibit the others from functioning normally Transient protection is an integral part of the solid state switches contact operation is critical to safety An example of overcoming this problem is presented in Section 1 1 1 External snubbing and arc suppression devices are unnecessary Line to line and line to ground arrestors are recommended for circuits that exit the house or case Short Circuit Protection A short circuit can damage the relay and possibly initiate a fire in the wiring With the low voltage contacts a short circuit will cause no damage to the wiring or the ECFR There should be less concern about short circuits with the ECFR Code Following Integrity and Reliability Contacts open and close substantially matching the ON time of the code but erode with time this causes code ON time distortion and eventually contact failure The rate of contact failure is accelerated at higher code rates and contact loading In cab signal applications the point on the waveform of circuit interruption is random Code ON time is more consistent
12. ode Following Track Relay SM 9278 Original August 2005 UNION SWITCH 8 SIGNAL Technical Support 5 Technical Support The Rapid Action Information Link Team RAIL Team is a group of experienced product and application engineers ready to assist you to resolve any technical issues concerning this product Contact the RAIL Team at 1 800 652 7276 or by e mail at railteam Oswitch com SM 9278 Original August 2005 5 1 Technical Support UNION SWITCH 8 SIGNAL 5 2 SM 9278 Original August 2005
13. ront contact switches and opens the back contact switches In the event that back contacts are not required it is still necessary to apply steady energy to the track version of the relays Solid state track relays operate as a four front four back relay only The circuit boards are populated for low voltage applications The low voltage unit can support load currents to 2 5 amperes to 30 VDC 22 volts Vrms AC Breakdown voltage across a normal reverse contact set is limited by the surge protection ratings of 34 VDC for low voltage contacts t 41 ETE 12 STEADY 12 al le TM en TE AF H B t T H OB A C C00ED Cl Gleb x 4 2 Pi d H CC Cas d IF T i d LI UCA Figure 1 1 Typical Shelf Mounted Code Following Relay SM 9278 Original August 2005 1 1 UNION SWITCH 8 SIGNAL Introduction Table 1 1 Cross References for Solid State Electromechanical CDP Relays Recommended Solid State Operating Contacts Contact Application Replacement Current N216371 N232752 A lee 0 82A 0 3 4FB LV N40700408 4FB LV AC DC 1 2 3 4 N275968 1FB HV 1 1FB HV AC Only 1 3FB ka ka 3FB LV 2 3 4 40700409 LV AC DC 42 3 and 4 The shelf mounted solid state biased code following relays have a low input impedance and are to be used in code following track circuit applications The main difference between the solid state relay and the electromechanical relay is that a steady energy source must be connected
14. ssible to take into account every eventuality that may arise with technical equipment in service Please consult your local US amp S Account Executive in the event of any irregularities with our product We expressly disclaim liability resulting from any improper handling or use of our equipment even if these instructions contain no specific indication in this respect We strongly recommend that only approved US amp S spare parts be used as replacements SM 9278 Original August 2005 Revision History UNION SWITCH amp SIGNAL Revision History August 2005 Initial Release of Manual ii SM 9278 Original August 2005 UNION SWITCH 8 SIGNAL Table of Contents Table of Contents 1 Teas Te MAANA m 1 1 1 1 Application Considerations EE manala ma kadastik Maamaa laata 1 2 1 1 1 Overcoming Contact DependenGe sss ee ee vezeg yasr ee ents eee Re ee ee rE yey Yee Zon ee Eyo 1 2 1 2 E eT T ala 1 3 2 Equipment Description ee eene se ee Re KEER ER KEER GE RR KEER GE RR KEER GE ER KEER GE Re RE KERR GE Re KEER GE Ke KEER GE Ke KEER GE Ke Rae Re KEER GR Ee KEER GE Ke KEER Ge Ke Ka 2 1 2 1 Contacts and Current Ratings EE DE get Ee ETE He Dee Ee ERGE ee Be DERE E Dee ee Re De EE AR Ee Ge t kaa atu ee Ee 2 1 2 2 Isolation for Biased Solid State Relays ees esse ee ee ee ee AA nenen AAR ee ee ee ee ee ee nene 2 1 2 3 Voltage Requirement S si EE mastid ASE es EK NEE Ge ERG EE ee Ek oe GE ee laada daa Ne Ee ates metals 2 1 3 hi EL Ge
Download Pdf Manuals
Related Search