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TO PREVENT ELECTRICAL FEEDBACK AS <br />REQUIRED BY MOST ELECTRICAL CODES <br />• Optically isolated inputs from up to eight dispensers <br />• LED's indicate when source power is applied and <br />dispenser hook signals are present <br />• Can be supplied factory wired in tandem with the FE Petro <br />Smart Controller or our standard control box <br />• Compatible with any submersible pump controller <br />• Fuse protected output to submersible pump controller <br />• Retrofittable to any existing site <br />• Prevents damage to dispenser relay boards caused by cross -phasing <br />• Prevents electrical feedback between dispenser hook circuits during periods of maintenance and service as required <br />by NEC 514-6, 1999, and other international codes <br />• Aids in troubleshooting dispenser hook circuits because signals are isolated <br />• Eliminates false STP run due to voltage leakage of multiple dispensers connected in parallel <br />• Small size <br />• Low cost <br />FROM 2 STP <br />DISPENSERS 3 CONTROL <br />a BOX <br />WITH STPOOHI <br />STP-DHI <br />2 <br />I ' <br />STP <br />FROM <br />3 <br />v <br />5 <br />CONTROL <br />DISPENSERS <br />a i <br />y <br />BOX <br />(UP TO PER DHI) 4 <br />I O <br />