U212-A Rolling Display

U212-A Rolling Display

Features:

Power : AC220V , 50Hz

Including : 2 displays , 1 power board , 1 transformer , 1 SSR

The content on the display could be changeable

Easily fixed on fuel dispenser

100% Factory Tested

ariable DC voltage. Diagram 3-9 is a drive circuit. The display mode of volume and sales on main display board adopt 6 digits liquid crystal display (Model ED-139, see Diagram 3-11), PPU or unit price r digits LCD (Model ED-830, see Diagram 3-12). Diagram 3-9: Static circuit and wave of LCD tube Diagram 3-10: Drive circuit of one-digit tube Diagram 3-11: ED-139 6-digit LCD Diagram 3-12: ED-830 4-digit LCD Display drive chip often adopts 8-digit memory/flip-latch: 74HC95. The drive circuit of liquid crystal display is composed of double D trigger 74HC74 and double input exclusive-OR gate 74HC86. Some fuel dispensers adopt special crystal drive circuit in liquid crysta fuel dispenser l displa fuel dispenser y, its principle basically similar to 74 series LCD drive circuit. A few fuel dispenser manufacturers adopt light-emitting diode (LED) as display components of display board because its cost is low and need not backlight in evening. The defect of this display component is bad display effect, especially under extensive sunlight, and much electricity consumption. LED display drive circuit also has parallel and serial drive, similar to LCD display drive circuit in terms of structure. Very few fuel dispensers adopt matrix or color liquid crystal display, showing much information. However, it largely increases cost. 2.4 Power suppl fuel dispenser y Stable voltage power supply used in explosion-proof fuel dispenser Most of fuel dispensers adopt explosion-proof type, installing liner stable voltage power supply or switch voltage power supply. Switch voltage stabilizing power supply includes power transformer, DC/DC converter, 220V direct commute and pulse transformer, illustrated in Diagram 3-14 and 3-15. Due to cost-efficient and simple design, liner stable voltage power is widely adopted. However, it is affected by exterior network voltage. Although pulse transformer is able to tackle with network voltage fluctuation, it is can’t afford because of complicated technology, expensive cost and difficult to maintenance. In recent years, D

　 Loyalty LoyaltyFlag=true　　 CardServiceRequest　　Response:　　 CardServiceResponse RequestType=LoyaltySwipe WorkstationID=POS01 RequestID=01254　　OverallResult=Success xmlns=www.nrf-arts.orgIXRetailnamespace　　xmlns:IFSF=www.ifsf.org xmlns:xsi=www.w3.org2001XMLSchema-instance　　xsi:schemaLocation= . CardResponse.xsd　　 Terminal TerminalID=01215034001　　 Loyalty LoyaltyFlag=true　　 LoyaltyCard　　 Byte 0 Byte　　 Byte 255 Byte　　 Byte 123 Byte　　 Byte 250 Byte　　 Byte 123 Byte　　 Byte 32 fuel dispenser Byte　〠fuel dispenser € Byte 123 Byte　　 Byte 232 Byte　　 Byte 65 Byte　　 Byte 77 Byte　　August 2002 IFSF STANDARD FORECOURT PROTOCOL FP319_1.00　　 EPS POS INTERFACE SPECIFICATION　　Page 62 of 146　　 LoyaltyCard　　 Loyalty　　 CardServiceResponse　　When the rang up has finished the customer pays with credit card and the loyalty redemption is processed　　by the host.　　Request:　　 CardServiceRequest RequestType=CardPaymentLoyaltyRedemption App fuel dispenser licationSender=POSsell001　　WorkstationID=POS01 RequestID=01254 xmlns=www.nrf-arts.orgIXRetailnamespace　　xmlns:IFSF=www.ifsf.org xmlns:xsi=www.w3.org2001XMLSchema-instance　　xsi:schemaLocation= . CardRequest.xsd　　 POSdata LanguageCode=it　　 POSTimeStamp 2002-04-07T18:39:09-08:00 POSTimeStamp　　 ServiceLevel F ServiceLevel　　 ClerkID 01203001 ClerkID　　 POSdata　　 Loyalty LoyaltyFlag=true　　 LoyaltyCard　　 Byte 0 Byte　　 Byte 255 Byte　　 Byte

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