Murphy M-6797B User's Manual
Contents
1. 2 ohm coil Used with NICS 78 non incendive control system Service part only Complies with EMC Council directive 89 336 EEC regarding electromagnetic compatibility M 6797B page 3 of 4 Base Models M42641CD 117 117PH 518PH 518APH 518E 520APH 521PH 760A 761APH 822PH M42641M R129A ETS30S MS2100 MS2111 MS2110 MS2120 Time Delay where applicable 15 15 seconds 30 30 seconds 60 60 seconds Specify other Configurations Available How to Order Specify model number and options using the diagram below List options in alphabetical order A to Z followed by numeric in ascending order Place a dash between each option 760AF 15 12 Options Not all options may not be available on all models in combination with other options See Configurations Available chart below AS Auxiliary SPDT switch ES Environmentally sealed EL Explosion proof less case Voltage Ground where applicable 12 12 VDC 24 24 VDC Add the letter P to the base model to indicate an inline fuse instead of a base mounted fuse Exam ple 760AF 761APHF 117F 19 Volt negative ground version only 1 Offered 2 Auxiliary snap switch Warranty Accessories Order accessories as a separate item Specify part number when ordering 25050016 Weathercap 25050547 Clear flexible dust boot for push button 30050323 Single unit mounting panel 65010026 In line fuse hold2. 8E Same as 518APH but recommended for high vibration application where nuisance shutdowns typically occur due to higher than normal vibrations ie wood chippers 12 Volt only M4264 Series Detects loss of magneto CD ignition output and transfers con tacts for customer use Contacts 10 amps 48 VAC VDC M42641CD transfers SPDT dry contacts when tripped 520APH Same as 518APH except with 30 second time delay before trip on one SWICH GAGE contact input but immediate trip on the second SWICHGAGE contact input Typical use is for immediate stop of engine from oil pressure or coolant temperature but delayed shutdown from alignment switches on center pivot irrigation system Specify 12 or 24 VDC and length of time delay Time delays are available from 5 to 120 seconds Contacts 10 amps 24 V 14 amp fuse R129A A SPDT relay with 10 amp dry contacts Specify 12 or 24 VDC Contacts 10 amps 24 VDC 14 amp fuse 521PH Use with N C SWICHGAGE or switches to ground magneto or CD ignition when tripped Trip coil energized to run de energized to shutdown when N C contacts open Specify 12 or 24 VDC Contacts 10 amps 24 V ETS30S All solid state time delay for energized to stop circuits such as solenoids When a shutdown signal is received the ETS30S applies power to the shutdown device for 30 seconds and then disconnects the power Input power 12 or 24 VDC MS2111 Replaces 221PH w 7
3. TATTLETALE Annunciators and M 6797B Revised 10 06 Catalog Section 25 Magnetic Switches Description TATTLETALE annunciators and Magnetic Switches are the nerve centers that translate SWICHGAGE contact operations into decisions and operate the alarm or shutdown device They are the electrical load carrying devices for the alarm or shutdown device TATTLETALE annunciators indicate which monitored function failed leading to the alarm or shutdown whereas magnetic switches do not Magnetic switches operate basically as a latching relay Application Magnetic Switches and TATTLETALE annunciators are available for use with engines or electric motors Various circuits time delays and contact configurations are available to match the power source and mode of operation required for alarm only alarm before shutdown or shutdown only For distributor ignition engines the magnetic switch opens the distributor coil circuit to cause shutdown For magneto or CD ignitions the magnetic switch grounds the ignition output Some models can also trip fuel valves instead of or in addition to grounding the ignition Diesel engines are shut down by either closing off the fuel or air supply Magnetic switches and TATTLETALE annunciators can make or break circuits for these engines For electric motor applications various magnetic switches are available to operate the motor starter holding coil directly or in conjunction with appropriat
4. e Murphy Transformer Relay assembly MURPHY 3 m Nerve Centers for Murphy SWICHGAGE Instruments and Automation Systems Features Magnetic switches and TATTLETALE annunciators described in this bulletin are electrically tripped relay type devices Models are available to operate from battery power 120 VAC conventional magnetos and capacitor discharge type ignitions Energized to run models allow CLOSED LOOP circuitry Others draw momentary power to trip Configurations are available for contact make or contact break to cause shutdown Some models have both make and break contacts All models have a weather resistant case with screw terminals for ease of customer hookup Manually reset models have a face mounted reset push button which also serves as a fault indicator in the TATTLETALE version In this application one or more TATTLETALE magnetic switches are used to advise operating personnel which monitored function caused shutdown Only the TATTLETALE connected to that function sensor trips causing the reset push button to pop out Electrically reset models perform the same functions as the manually reset models and are reset by cycling the power supply off and then on Time delay models use reliable solid state timing circuits to lockout operated switch contacts for start up and or to allow operation of alarms before shutdown occurs Specific models allow application of power to a shutdown circuit and automatic disco
5. er with 14 amp fuse A limited warranty on materials and workmanship is given with this FW Murphy product A copy of the warranty may be viewed or printed by going to www fwmurphy com support warranty htm FW MURPHY P O Box 470248 Tulsa Oklahoma 74147 USA 1 918 317 4100 Fax 1 918 317 4266 E mail sales fwmurphy com INDUSTRIAL PANEL DIVISION Fax 918 317 4124 E mail ipdsales fwmurphy com MURPHY POWER IGNITION Web site www murphy pi com www fwmurphy com CONTROL SYSTEMS amp SERVICES DIVISION P O Box 1819 Rosenberg Texas 77471 USA Phone 281 633 4500 Fax 281 633 4588 E mail sales fwmurphy com Web site www fwmurphy com FRANK W MURPHY LTD Church Rd Laverstock Salisbury SP1 1QZ UK Phone 44 1722 410055 Fax 44 1722 410088 E mail sales fwmurphy co uk Web site www fwmur phy co uk M 6797B page 4 of 4 COMPUTRONIC CONTROLS LTD 41 43 Railway Terrace Nechells Birmingham B7 5NG UK Phone 44 121 327 8500 Fax 44 121 327 8501 E mail info computroniccontrols com Web site www computroniccontrols com FW MURPHY INSTRUMENTS HANGZHOU CO LTD 77 23rd Street Hangzhou Economic amp Technological Development Area Hangzhou Zhejiang 310018 China Phone 86 571 8788 6060 Fax 86 571 8684 8878 Printed in U Brigted in U S A 07 8 793 ISO 9001 Gaerne
6. nnect of power after a given time delay See the chart on page 2 for features by part number Applies to selected models M 6797B page of 4 O AL gt eee val SRERREEE 24 volt e 12 24 volt 120 VAC Magneto ignition CD ignition Coil see Note 6 below 6e 2 4 1 7 7 Contacts see Note 2 below Energize to latch Reset Type Manual indicating Manual non indicating Electric non indicating ae TEHE Before shutdown HHH Jel ele Start only After shutdown E eE E clo Iie fe ie INT Te e 1 le leje faj f0 om oem eje m e E _ e B B alae Energize to trip BOQ FE E Multi voltage AC or DC systems See circuit A Dry contacts normally wired in hot circuit Does not latch after shutdown signal clears descriptions below and on next page B Dry contacts normally wired in ground circuit automatically resets NOTES The chart above indicates features configurations available for each model 4 Reset Type Refers to manual or electric reset manual indicating type is a TAT 1 Coil Voltage Coils are specific voltage rated or multiple voltage rated TLETALE 2 Contacts This is the control circuit output In the latched position the NCH con 5 Time Delay Indicates operation of the time delay tact has a hot output in the tripped position the NOH contact has a hot out 6 Coil Resistances in OHMS o
7. nother when tripped Operates from Magneto Ignition The operating coil is intermittent duty and must be disconnected by an external circuit when tripped The MS2120 is a replacement for 307 307PH and 224 M 6797B page 2 of 4 518PH Aallows for SWICHGAGE and or N C contacts to be wired Closed Loop in series Any contact open or SWICHGAGE contact close in the circuit shunt trips the 760A 760AF 761APH Use for distribu tor ignition or diesel Time delay lockout of SWICHGAGE contacts on start up only cus tomer wired for delayed or immediate trip on shutdown Breaks and makes circuits when tripped 760A resets automatically when the shutdown signal is removed or power is removed 761APH has manual reset 760AF is 760A with inline fuse Must specify 12 or 24 VDC and length of time delay Optional time delays 15 30 standard or 60 seconds Contacts 10 amps 24 V 14 amp fuse Models 760A and 761APH carry the CE mark 518PH Specify 12 or 24 VDC Contacts 10 amps 24V 14 amp fuse 518APH Allows for SWICHGAGE and or N C contacts to be wired Closed Loop in series Any contact open or SWICHGAGE contact close in the circuit shunt trips the 518APH Specify 12 or 24 VDC Contacts 10 amps 24V 14 amp fuse 822PH Used in Murphy TR assemblies as master disconnect 24 VAC coil energizes when SWICHGAGE contact closes to ground breaks and makes circuit when tripped Manual reset 51
8. r coil and resistor put In the latched position the NCG has a grounded output in the tripped 1 0 5 2 18 3 30 4 72 5 90 190 for 12 24 6 288 7 339 678 for 12 24 position the NOG has a grounded output 8 339 618 for 12 24 3 Latch Type Refers to whether the magnetic coil is momentarily energized to trip or requires continuous power in the operating mode and de energizes to trip 117 117PH Use to shutdown 12V thru 32V distributor ignition or diesel engines Breaks circuit when tripped Opens distributor coil cir cuit or power circuit to diesel run device MS2110 Multi purpose TATTLETALE with dry contacts that can be used to make two circuits and break another when tripped Operates from 12 or 24 VDC or 24 VAC The operating coil is intermittent duty and must be disconnected by an external circuit when tripped The MS2110 is a replacement for 221PH 169PH 274 and 274PH Automatically disconnects from battery after trip Contacts 10 amps 32 VDC 14 amp fuse MS2100 Multi purpose TATTLETALE with dry contacts that can be used to make two circuits and break another when tripped Operates from 120 VAC or Capacitor Discharge Ignition The operating coil is inter mittent duty and must be disconnected by an external circuit when tripped The MS2100 is a replacement for 100PH 307CD 307PHCD and 224CD MS2120 Multi purpose TATTLETALE with dry contacts that can be used to make two circuits and break a
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