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Scully ST-15C Series, Technical Manual

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Scully ST-15C Series Technical Manual Download Page 21

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Summary of Contents for ST-15C Series

Page 1: ...Model ST 15C Series Technical Manual Single Point Overfill Prevention Control Monitor scully ...

Page 2: ...ck Dynamic Self Checking Dynamic Faylsafe Go Anywhere Dynamic Self Testing IntelliCheck Intellitrol Scully Intelliview Load Anywhere Maxsafety R S V P Scully and V I P are registered trademarks of Scully Signal Company ...

Page 3: ...2 1 Mechanical Installation 9 2 2 Electrical Installation 9 2 2 1 Power Connections 10 2 2 2 Enclosure Earth Ground Connection 10 2 2 3 Control Output Controlled Circuit Connections 10 2 2 4 Intrinsically Safe Connections to Sculcon Plug Cable Unit 10 2 3 Initial System Checkout 11 2 3 1 Test Equipment 11 2 3 2 Operational Testing 11 3 0 MAINTENANCE 12 3 1 Enclosure 12 3 2 Corrosion Protection 12 ...

Page 4: ...n Box DWG 61442 18 Installation Wiring Diagram DWG 61575 19 Wiring Diagram Typical Loading Rack Control DWG 61441 20 Internal Wiring Diagram ST 15C EL DWG 31392 22 Internal Wiring Diagram ST 15C ELK DWG 31393 23 Replacement Parts List ST 15C 120VAC DWG 61558 Error Bookmark not defined Replacement Parts List ST 15C 240VAC DWG 61272 Error Bookmark not defined ...

Page 5: ...for immediate shutdown of the loading operation The ST 15C uses intrinsically safe voltage and current to connect to Scully liquid level sensors and provides control for external electrical devices by opening and closing relay contacts Scully loading rack overfill protection monitors have been carefully engineered to provide reliable and safe performance when installed in conjunction with related ...

Page 6: ... and the circuit is functioning properly Controller output is in permissive state i e permit to load OFF ON Sensor is wet or faulty or no connection to sensor or the circuit is malfunctioning Controller output is in non permissive state i e no permit to load OFF OFF No power to the unit 1 1 4 Bypass Control Switch Adding the suffix K to the model number adds a lockable two position control switch ...

Page 7: ...esponse Time PERMISSIVE Output goes permissive in 6 to 30 seconds typical of connection to a thermistor sensor warm up time of thermistor Output goes permissive instantaneously when connected to an optic sensor NON PERMISSIVE shutdown 0 5 second maximum Indicator Lights Output status indicator lights Red Non permissive Green Permissive Output Control Fuse Internal 5 Ampere Connections Provided by ...

Page 8: ...lug and cable assembly directly into the bottom of the ST 15C enclosure is not recommended and will result in greatly increased maintenance time and difficulty when the plug and cable assembly requires maintenance 1 3 1 Sculcon Junction Box with Plug and Cable Assembly The following model is needed to make connection to a vehicle The selection is based on the style of socket used on the vehicles B...

Page 9: ... holes provided for wiring The top two holes are for power and control wiring The bottom hole is for intrinsically safe sensor wiring only Do not drill any additional conduit holes in the enclosure doing so violates the enclosure s hazardous location approval and voids the warranty To avoid future maintenance issues regarding water infiltration into the enclosure via the electrical cable entries w...

Page 10: ...acket The output contact is rated 250VAC 5A resistive maximum It is used to close a valve or pump directly or by wiring it in series with other control contacts such as a preset meter s control contacts See Diagram 61441 Typical Loading Rack Control in Appendix 4 0 In addition it may also be connected to an input of a terminal automation system TAS to provide status of the controller s output to T...

Page 11: ...y sensors 2 wire thermistor or Optic Sensors As ST 15C is a single point controller monitors only one sensor the tester only needs to test in one of the eight positions of the selector switch on the tester Select switch position 5 to test the ST 15C As the tester simulates a vehicle equipped with 2 wire sensors the ST 15C output will go permissive immediately with green light ON and red light OFF ...

Page 12: ... Board The ST 15C control unit s internal circuitry does not require any routine periodic maintenance The control circuitry may be repaired only by replacing the internal control module with an equivalent module The internal module is non repairable DO NOT ATTEMPT TO SERVICE OR REPLACE COMPONENTS ON THE ST 15C MODULE DOING SO WILL NEGATE WARRANTIES CERTIFICATIONS AND JEOPARDIZE INTRINSIC SAFETY AS...

Page 13: ...tegrity must be maintained The ST 15C Control Module should not be subjected to any mechanical impact Do not allow build up of dust on the Control Module Caution Do not expose the Control Module to aggressive substances that may attack the exposed materials When used properly contact with the control module will not cause physical injury or harm and does not pose non electrical dangers The unit do...

Page 14: ... surface of the plug should be kept clean using a mild detergent based cleaning solution and water The cabling should be routinely wiped of foreign material and cleaned to preserve the outer jacket To protect it from loading arm damage etc it is important to store the plug and cable out of harms way when it is not in use A hook is provided on Sculcon Junction Box or a Scully Storage Socket may be ...

Page 15: ...15 ...

Page 16: ...16 4 0 APPENDIX Control Unit Enclosure Outline Drawing DWG 31412 ...

Page 17: ...17 Outline Drawing Sculcon Junction Box DWG 63039 ...

Page 18: ...18 Mounting Diagram Control Unit Junction Box DWG 61442 ...

Page 19: ...19 Installation Wiring Diagram DWG 61575 ...

Page 20: ...20 Wiring Diagram Typical Loading Rack Control DWG 61441 ...

Page 21: ...21 Notes ...

Page 22: ...22 Internal Wiring Diagram ST 15C EL DWG 31392 ...

Page 23: ...23 Internal Wiring Diagram ST 15C ELK DWG 31393 ...

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Page 28: ...28 P N 61119 REV C ...

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