Security system for e.g. multi-service station, has evaluation unit releasing or disrupting refueling process by pressurizing control unit depending on signals of PTC resistors of single tank

摘要

#CMT# #/CMT# The system (10) has a positive temperature co-efficient (PTC) resistor (42) connected with an interface (38) for attaching a control unit (36) of a tank lorry. A backup sensor is attached to an evaluation unit (12) that is connected with the control unit between the interface and the PTC resistor of a single tank (26a). The evaluation unit is connected with the interface by an optical coupler (20). The evaluation unit releases or disrupts a refueling process by pressurizing the control unit depending on signals of the PTC resistors of the single tank. #CMT#USE : #/CMT# Security system for single and multi-service stations. #CMT#ADVANTAGE : #/CMT# The evaluation unit releases or disrupts the refueling process by pressurizing the control unit depending on signals of the PTC resistors of the single tank, thus avoiding influence of acquaintance and proven overcrowding security system with PTC resistor, and hence increasing the safety for single and multi-service stations. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic plan view of a security system. 10 : Security system 12 : Evaluation unit 20 : Optical coupler 26a : Single tank 36 : Control unit 38 : Interface 42 : Positive temperature co-efficient resistor.