Scully ST-47 Series Technical Manual
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Scully ST-47 Series Technical Manual

Self-proving vehicle grounding verification system
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Scully ST-47 Groundhog
Technical Manual
MaxSafety
®
SYSTEMS
ST-47 Series Self-Proving Vehicle
Grounding Veri cation System
Scully Signal Company /
70 Industrial Way, Wilmington, MA 01887-3479, USA
/
Tel. 617 692 8600
Fax. 617 692 8620
/
sales@scully.com
/
800 2 SCULLY (272 8559)
/

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Summary of Contents for Scully ST-47 Series

  • Page 1 Scully ST-47 Groundhog Technical Manual ST-47 Series Self-Proving Vehicle Grounding Veri cation System Scully Signal Company / MaxSafety ® Tel. 617 692 8600 Fax. 617 692 8620 800 2 SCULLY (272 8559) SYSTEMS 70 Industrial Way, Wilmington, MA 01887-3479, USA...

  • Page 3: Table Of Contents

    ST-47 Groundhog - Technical Manual Table of Contents General Purpose of Equipment ST-47 Normal Operation Technical Speci cations & Approvals Input Power Control Contact Operating Temperature FM Approval & FM Approval for Canada Installation Enclosure Physical Location Electrical Installation Ground Ball Installation- Stand Alone Applications Ground Bolt Installation- Combined with Rack Monitor Initial System Checkout General...
  • Page 4 ST-47 Groundhog - Technical Manual Table of Contents Diagram Appendix DWG 61655 – Installation Drawing with Entity Parameters DWG 31412 – Outline Drawing – Control Unit Enclosure DWG 63039 – Outline Drawing – Sculcon Junction Box DWG 61441 – Wiring Diagram – Typical Loading Rack Control DWG 61345 –...
  • Page 5 32 foot (ten meter) coiled or a 20 foot (six meter) straight cable. A single Scully Ground Ball mounted on a tank vehicle serves as the truck ground veri cation point. The system is self-proving when the snap-on plug is connected to the vehicle mounted Ground Ball.

  • Page 6: St-47 Normal Operation

    (Applies to Models ST-47 EL(K)/D) Deadman capable models of the ST-47 differ from standard models in two ways 1.) The Model ST-47/D requires the use of a Scully deadman equipped plug and cable or ground ball connector and cable assemblies (Model SC-47CC/D). These include a hand-operated deadman switch added to a standard plug and cable assembly.
  • Page 7 Two wires (black and white) are factory connected from the Deadman switch to terminals 1 and 2 inside the Scully plug and cable box. Applicable junction boxes may be identi ed by the “/D” in their Model designation. The end-user must provide wiring which connects the two terminals to TB3 inside (bottom) of the ST-47 explosion proof housing.
  • Page 8 ST-47 Groundhog - Technical Manual General CONTROL CONTACTS FUSE MAINS POWER Size: 3AG RATED 5 AMPS 250 - 5A 250 Volts MAX “SLO - BLO” NEUT (TB1) Figure 1.2 ST-47 Terminal Block Location Illustration Page 8.

  • Page 9: Technical Speci Cations & Approvals

    Self-Proving Vehicle Grounding Veri cation System Technical Speci cations and Approvals Input Power 120 VAC +/- 15% or 208-240 VAC 50/60Hz .25 Amps Maximum .125 Amps Maximum Control Contact Independently fused, 240 VAC 5 Amps resistive Operating Temperature -40 to +158 deg. F (-40 to +70 deg.

  • Page 10: Installation

    Systems using an ST-47 controller are wired as shown on an appropriate diagram in the appendix. Ground Ball Installation - Stand Alone Applications Refer to installations packed with Ground Ball, Scully Drawing No.61067. Ground Bolt Installation - Combined with Rack Monitor Refer to installations packed with Ground Bolt, Scully Drawing No.61081.

  • Page 11: Initial System Checkout

    Self-Proving Vehicle Grounding Veri cation System Initial System Checkout General (Refer to Figure 1.2 for Terminal Block & Fuse Locations) Note: All Tests are done with line power applied to the ST-47. CAUTION Hazardous Voltages are Present Inside the ST-47 Explosion Proof Housing.

  • Page 12: Servicing The St

    If it is not, correct the line voltage problems. Returning part to Scully for repair or Warranty consideration: Before returning any defective equipment to the Scully Signal Company for repair and/or Warranty consideration, call Scully at 1.800.272.8559 for an RMA (Return Material Authorization) number.
  • Page 13 Procedure 1, Step B If you have a Scully Rack Tester, plug the over ll prevention cable into the socket on the tester. If you do not have a tester but do have a Scully Ground Bolt, use jumper wires to connect the green...
  • Page 14 Procedure 2, Step A This step requires a Scully Ground Bolt or Ground Ball for testing- if you do not have one, Go to Step A1. Use a jumper wire to connect the green wire on the bolt to the center pin inside of the plug and connect the body of the bolt to one of the three tension ngers inside the plug.

  • Page 15: Servicing The

    Servicing the ST-47 Procedure 2, Step A1 (Ground Bolt or Ground Ball NOT required) If you do not have a Scully Ground Bolt or Ground Ball. Using a Multi-Meter set on DC volts measure the voltage between spring plunger contact inside the plug (+) and one of the three contact ngers (-) of the Ground Ball Connector Plug.

  • Page 16: 5.6.1 General

    Before proceeding with this section the ST-47 must be operational. It must permit (green lamp) when connected to a Scully Ground Ball or Ground Bolt. The unit is capable of turning on the green permit lamp even if the deadman circuitry is not functioning properly. If the unit will not permit, consult the earlier parts of this troubleshooting section for advice on repairing the problem.

  • Page 17: Dwg 61655 - Installation Drawing With Entity Parameters

    Self-Proving Vehicle Grounding Veri cation System Diagram Appendix DWG 61655 – Installation Drawing with Entity Parameters Page 17.

  • Page 18: Dwg 31412 - Outline Drawing - Control Unit Enclosure

    (50.8) 6.62 (168.1) SEE NOTE 2 TOP VIEW 10°, 4 PL 5.75 (146.0) 13.69 (MOUNTING LUG CENTERS) (347.7) scully (12.7) 6.75 8.44 (171.5) (214.3) (MOUNTING LUG CENTERS) FRONT VIEW REAR VIEW NOTES: 1. DIMENSIONS ARE IN INCHES WITH MILLIMETERS 8.38 IN PARENTHIESS.

  • Page 19: Dwg 63039 - Outline Drawing - Sculcon Junction Box

    Self-Proving Vehicle Grounding Veri cation System Diagram Appendix DWG 63039 – Outline Drawing – Sculcon Junction Box Page 19.

  • Page 20: Dwg 61441 - Wiring Diagram - Typical Loading Rack Control

    ST-47 Groundhog - Technical Manual Diagram Appendix DWG 61441 – Wiring Diagram – Typical Loading Rack Control Page 20.

  • Page 21: Dwg 61345 - Principle Of Over Ll Prevention & Grounding

    Self-Proving Vehicle Grounding Veri cation System Diagram Appendix DWG 61345 – Principle of Over ll Prevention & Grounding Page 21.

  • Page 22: Dwg 61346 - Grounding Protection For Product Loading & Of Oading

    ST-47 Groundhog - Technical Manual Diagram Appendix DWG 61346 – Grounding Protection for Product Loading & Of oading Page 22.

  • Page 23: Dwg 61442 - Mounting Diagram - Control Unit & Junction Box

    Self-Proving Vehicle Grounding Veri cation System Diagram Appendix DWG 61442 – Mounting Diagram – Control Unit & Junction Box Page 23.

  • Page 24: Dwg 61334 - Internal Wiring Diagram St-47-El

    ST-47 Groundhog - Technical Manual Diagram Appendix DWG 61334 – Internal Wiring Diagram ST-47-EL Page 24.

  • Page 25: Dwg 61333 - Internal Wiring Diagram St-47-Elk

    Self-Proving Vehicle Grounding Veri cation System Diagram Appendix DWG 61333 – Internal Wiring Diagram ST-47-ELK Page 25.

  • Page 26: Dwg 61331 - Internal Wiring Diagram St-47-El/D

    ST-47 Groundhog - Technical Manual Diagram Appendix 6.10 DWG 61331 – Internal Wiring Diagram ST-47-EL/D Page 26.

  • Page 27: Dwg 61332 - Internal Wiring Diagram St-47-Elk/D

    Self-Proving Vehicle Grounding Veri cation System Diagram Appendix 6.11 DWG 61332 – Internal Wiring Diagram ST-47-ELK/D Page 27.

  • Page 28: Dwg 61121 - Field Wiring Diagram St-47-115/240 El(K)

    ST-47 Groundhog - Technical Manual Diagram Appendix 6.12 DWG 61121 – Field Wiring Diagram ST-47-115/240 EL(K) Page 28.

  • Page 29: Dwg 61099 - Field Wiring Diagram

    Self-Proving Vehicle Grounding Veri cation System Diagram Appendix 6.13 DWG 61099 – Field Wiring Diagram ST-35/ST-47 Page 29.

  • Page 30: Dwg 61098 - Field Wiring Diagram

    ST-47 Groundhog - Technical Manual Diagram Appendix 6.14 DWG 61098 – Field Wiring Diagram ST-15/ST-47 Page 30.

  • Page 31: Dwg 61141 - Field Wiring Diagram St-47-115 El(K)D

    Self-Proving Vehicle Grounding Veri cation System Diagram Appendix 6.15 DWG 61141 – Field Wiring Diagram ST-47-115 EL(K)/D Page 31.

  • Page 32: Dwg 61168 - Field Wiring Diagram St-15-Elk/D

    ST-47 Groundhog - Technical Manual Diagram Appendix 6.16 DWG 61168 – Field Wiring Diagram ST-15-ELK/D & ST-47 Page 32.

  • Page 33: Dwg 61167 - Field Wiring Diagram St-15-Elk/D

    Self-Proving Vehicle Grounding Veri cation System Diagram Appendix 6.17 DWG 61167 – Field Wiring Diagram ST-15-ELK/D & ST-47 Page 33.

  • Page 34: Dwg 61169 - Field Wiring Diagram St-35-Elk/D

    ST-47 Groundhog - Technical Manual Diagram Appendix 6.18 DWG 61169 – Field Wiring Diagram ST-35-ELK/D & ST-47 Page 34.

  • Page 35: Dwg 61202 – Replacement Parts For St-47-115

    Item 3: Hex-head screw used on models built after 10/92. Item 8: O-ring used on models built after 10/92. *Replacement Bulb for incandescent style explosion-proof lights only. 61202, Rev E 2013 Scully Signal Company Scully Systems Europe NV Scully UK Ltd MaxSafety ® 70 Industrial Way,...

  • Page 36: Dwg 61273 - Replacement Parts For St-47-240

    Notes: Item 3: Hex-head screw used on models built after 10/92. Item 8: O-ring used on models built after 10/92. 61273, Rev C 2013 Scully Signal Company Scully Systems Europe NV Scully UK Ltd MaxSafety ® 70 Industrial Way, Eksterveldlaan 31a...
  • Page 37 Notes: Page 37.
  • Page 38 Notes: Page 38.
  • Page 40 Scully is ISO certi ed and all of our products are 100% made in the U.S.A. In addition, we back up our products with the best service in the industry.

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