U501-A Pulse sensor

U501-A Pulse sensor

This incremental shaft encoder has been designed for heavy-duty application, especially for use in petroleum & diesel dispensing environments where potentially explosive atmospheres can be expected. It features a rugged and compact construction as well as a wide selection of mechanical and electronic variations.

Materials:

Housing: Die cast aluminum alloy

Bearings: Self-lubricating sintered bronze

Features :

A high advantage in reliability and adaptability.

A large selection of shaft couplings, including couplings with built-in backlash clutch facility.

Standard sealing screws.

The fuel resistant cable can be customized regarding length.

Suit the Bennett SB-100 meter and other meters whose pulse per circle is 60.

100% EX approved and tested.

Specifications:

Power supply: 5 VDC, fixed or variable

Current Consumption: Standard 10 to 30 mA, max 90mA

Number of Channels: 2

Number of pulses: 60 ppr

Output Signal: Square wave duty cycle 50%+10%.

Phase Shift: 2 channels 90° (25% +5%)

Output Stage: NPN

Output Current: Max. 30mA

Hysteresis: Min. 0.2°

Output freq. Min. 1000Hz

Temperature range: Working -40 to+ 70 degree

RPM: Max 3000RPM

Mounting: With 3 pcs. M4 screws

Weight: Approx. 340 gram. Excl. the cable

Wiring:

Color Channel plug

Green +5V 2

Black CH1 3

Yellow 0V 4

Blue CH2 5

Red +5V 6

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Approval:

The shaft encoder has been tested and granted Ex and EMC approval.The Ex-approval is EX d IIA T3.Ex certificate number is CE991209.

Package:

Cross Weight Dimension

340g/case of 1 186x157x29mm/case of 1

Important:

The products should be used in compliance with applicable country, province and local Laws and regulations. Products selection should be based on physical Specifications and limitations and compatibility with the environmentand materials to be handled. HONGYANG makes no warranty of fitness for a particular use. All illustrations and Specifications in this literature are based on the latest products information ilable at the time of publication,HONGYANG reserves the right to make changes at any time in price, materials. Specifications and models and to discontinue models without notice or obligation.

acklist, etc. Once found something wrong, it will obtain latest data from Center controller. Anti-low temperature The minimum limitation of working temperature is �0℃on general fuel dispenser. But on IC card fuel dispenser,�0�due to employ temperature control device. Turn on the device when necessary. Apart from the above functions IC card fuel dispenser should be pr fuel dispenser ovided with these traits such as explosion-proof electric safety, anti-dust, anti-interference, high applicability of power supply, high reliability, low ratio of failure, convenient for combination and expansion. Article IV Fuel dispenser and reader working flow Refueling process Under normal situation, filling process should be like this: When power supply is connected, the whole system begins to initiate. As CPU get open command (nozzle has switched on) motor is startup; small flux solenoid valve switch on, oil flowing out of nozzle; CPU calculates volume filled according to pulse transmitted by sensor; at same time, large flux solenoid valve is open, being large filling state. Metering circuit counts paid volume and money on basis of pulse sign transmitted by flow sensor, then transmit these data and unit price into CPU that control the display of current filing. Metering CPU, if in randomly filing, will switch off solenoid val fuel dispenser ve and motor to end filing when receive stop sign (nozzle has switched off). If in presetting filing process, metering CPU will firstly close large flux solenoid valve when paid volume approaching to presetting volume (100ml~~300ml), small flux solenoid valve being open until paid volume is equivalent to presetting volume. Finally, current filing inform fuel dispenser ation such as filled volume, money and unit price (PPU) is transmitted into CPU and display on screen. The proportion of large flux to small flux is 10 to 1. The knowledge of fuel dispenser’s normal working procedure is of importance to judge trouble and failure. Reader flow chart of main programme Diagram 3-27: Filling operation flow

SF_MC = 2 IFSF_MC = 0 IFSF_MC = 0　　 BL BL　　 M_St M_St M_St M_St　　 = Read + token = Read + token = Answer + token = Answer + token　　 M_Lg = 3 M_Lg = 3 M_Lg M_Lg　　 DB_Ad_Lg = 1 fuel dispenser DB_Ad_Lg = 1 DB_Ad_Lg = 1 DB_Ad_Lg = 1　　 DB_Ad = 0 DB_Ad = 0 DB_Ad = 0 DB_Ad = 0　　 Data_Id = 3 Data_Id = 3 Data_Id = 3 Data_Id = 3　　 Data_Lg = 2 x Data_Lg = 2 x　　 Data_El = Data_El =　　 S N S N　　 S N S N　　 � 媴　　 � 媴　　 (x S N) (x S N)　　The LNA = 0 (Subnet = 0 Node = 0) is used for internal messages (application layer to　　communication layer). For this fuel dispenser internal access the network messages dont exist the answer　　is sent back directly to the local application.　　DB_Ad = 0 means Communication Service Database.　　Undefined recipient addresses in the Recipient_Addr_Table are defined by S N = 0.　　February 2003 IFSF - STANDARD FORECOURT PROTOCOL FP2_1.84　　 fuel dispenser COMMUNICATION SPECIFICATION　　 Page: 33　　4.5.2.2 Write Recipient Address Table　　 Message on the Network　　 LNAR　　 LNAO　　 IFSF_MC = 2　　 BL　　 M_St = Write + t

l median wage of American graduates has fallen by 6% since 2000, a bigger decline than in average wages. In the 1980s and early 1990s, the pay gap between low-paid, low-skilled workers and high-paid, high- skilled workers widened significantly. But since then, according to a study by David Autor, Lawrence Katz and Melissa Kearney, in America, Britain and Germany workers fuel dispenser at the bottom as well as at the top have done better than those in the middle-income group. Office cleaning cannot be done by workers in India. It is the easily standardised skilled jobs in the middle, such as accounting, that are now being squeezed hardest. A study by Bradford Jensen and Lori Kletzer, at the Institute for International Economics in Washington, DC, confirms that workers in tradable services that are exposed to foreign competition tend to be more skilled than workers in non-tradable services and tradable manufacturing industries. Ride on, Ricardo None of this makes a case for protectionism. Offshoring, like trade, is beneficial to developed economies as a whole. The increased mobility of capital and technology does not invalidate the theory of comparative advantage, as some commentators like to argue. China and India cannot have a comparative advantage in everything; they will export some things and import othe fuel dispenser rs. Emerging economies comparative advantage will largely remain in labour-intensive industries. A country s trading pattern is determined by its relative capital intensity compared with other economies. Emerging economies still have relatively little capital, so they are unlikely to become significant capital-intensive exporters until their capital- fuel dispenser to-labour ratio catches up. That will take time. Developed economies will retain their comparative advantage in knowledge-intensive activities because they have relatively more skilled labour, but that advantage will be eroded more quickly in future. The developed economies as a whole will still benefit hugely from trade with emerging economies.