When wired into an overfill prevention system, the ST-47C Groundhog utilizes a spare conductor in the existing Scully overfill prevention plug and cable together with a special Scully Ground Bolt mounted on each vehicle. The Scully Ground Bolt sensing lead is wired to the Scully overfill prevention socket.
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Self-Proving Vehicle Earthing Verification System General 1.1.1 Model Designations The ST-47C Controller is available in 120VAC or 240VAC models, with or without control (Bypass) Switch. Model suffix (E) = Explosion-proof Enclosure, (L) = Indicator Lights, (K) = Key Lockable Bypass Switch.
Such use does not use a Ground Bolt or Ground Ball and, as such, does not have the anti-cheating advantages provided by the Ground Bolt or Ground Ball systems. Contact Scully Technical Services for more information. For a list of cables that integrate the ST-47C into Overfill Prevention systems, consult Scully Tech Data Sheet 60614. Page 7.
ST-47C Groundhog - Technical Manual Installation The ST-47C control system is typically installed in areas that are classified as hazardous locations due to nature of the products being loaded. Installation of the control unit and accessories must therefore be done by qualified personnel in accordance with all national and local regulations (codes) governing the installation of electrical equipment in hazardous locations.
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There are three holes in the enclosure for cable entry. Two holes in the top of the enclosure are for mains power and control output wiring. One hole in the bottom of the enclosure, labeled "Intrinsi cally Safe Entry" is for connection to ground verifications, via a Scully Sculcon Junction Box.
ST-2-DSWJ Tester has multiple socket configurations for connection to all Scully Sculcon Plug Models. Note: If the ST-47 is not being used integrally with a Scully overfill prevention system, you must provide a vehicle or simulation equipped with the ground verification device(s) installed.
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Self-Proving Vehicle Earthing Verification System Installation On units equipped with Bypass Control Switch: Return the Bypass Switch to the NORMAL position. The Bypass Switch should be kept under a lock (user provided) so that its setting cannot be tampered with. Connect the Sculcon plug to the socket on the tester.
(See Figure 1 ST-47C Control Module Illustration on following page). Non-operational control modules may be returned to Scully for repair. Contact Scully Technical Services for assistance in obtaining a Return Material Authorization (RMA) before returning any material to the factory.
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Figure 1: ST-47C Control Module Illustration Note: The ST-47C Replacement Control Module cannot be repaired in the field. A damaged or faulty module must be replaced with an equivalent Scully ST-47C Control Module. The ST-47C Replacement Control Module must only be installed in Scully's explosion-proof enclosure.
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, if an overfill prevention plug is used, a Scully Storage Socket may be used. Troubleshooting The following troubleshooting guide should aid in an initial diagnosis of most problems encountered with installation and operation of ST-47C.
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Self-Proving Vehicle Earthing Verification System Maintenance Condition Possible Cause • No lights ON, on front cover No power to control unit • Control (Bypass) Switch in OFF position • Bulb blown (on older units with incandescent lamps) • Input power fuse (F1) is blown •...
Item 5, 6: LED style lamps used on models built after 10/04/01. * Replacement bulb for incandescent style explosion-proof lights only. Use on models built prior to 10/04/01. 61557, Rev B 2013 Scully Signal Company Scully Systems Europe NV Scully UK Ltd MaxSafety ® 70 Industrial Way,...
Item 5, 6: LED style lights used on models built after 8/01 * Replacement bulb for incandescent style explosion-proof lights only. Use on models built prior to 8/01. 61274, Rev D 2013 Scully Signal Company Scully Systems Europe NV Scully UK Ltd MaxSafety ® 70 Industrial Way,...
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Scully is ISO certified 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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