Zhengzhou Electronic Technology Co., Ltd. Qin Geng: Professional Dining Hall machine, credit card machines, consumer machines manufacturer [Performance parameters] l Maximum number of things: 255 (to be equipped repeater) l Voice: error message, you can report the amount of consumption l water capacity: 80000 l can open an account card: 60,000 l Blacklist capacity: 60,000 l Maximum memory card Amount: 9999 yuan l single largest transaction amount: 6500 yuan l Card Type: Mifare One S50 card sensing distance l : 3-8cm l Reader Time: 0.3 seconds l Communication: RS-485 (standard), RS-232, TCP / IP l transmission rate: 9600bps l Display: 10 LED digital display double-sided, double-sided LCD Display l consumption: free-spending, fixed consumption, the consumption l Card encoding settings: five kinds of consumer grade cards, discounts and subsidies can achieve different time setting l: 4 consumption set period of time, second time limit may limit l small ticket printing : support (optional) l Operating voltage: DC12V l Power: less than 2W l dynamic backup battery time: more than 6 hours l Operating Humidity: 10% -90% l Working temperature: 0 ℃ -50 ℃ l Dimensions: Desktop 280 * 180 * 100mm hanging 230 * 200 * 65mm l Weight: about 1.1Kg cabling requirements [Project] 1) using a 120-ohm shielded twisted-pair cable to do the bus, each node will be connected in series, from the bus to each Lead node should be short (no longer than the delivery of communications lines), so that the lead of the reflected signal for bus signals with minimal impact. Although some network connection is not correct, still it may work in a short distance, but with the extension of the communication distance will become increasingly serious adverse effects. 2) minimize the lugs, not the non-use terminals, connectors must be pressure line or welding. It should not be the role of the branch network cable by mechanical force. Wear in the tube network cable, it is best not to have joints (to facilitate future maintenance), as far as possible the lugs on the terminal box if necessary. 3) data communications cable, AC power cord, DC power cable can not wear in the same tube. When To parallel cabling, separated by a distance of 50 cm or more should. 4) If the alignment outdoors, use a hose or other material properly protected. After the pipeline installation is completed, the line is connected to do first experiment, trouble-free only after equipment installation and commissioning. 5) When the bus length over 300 meters, it is necessary in the front and end of each bus plus 120 ohm resistor. Quality of service and follow-up support after the sales of products customers are most concerned about is the issue, but also a reflection of the strength of the project contractors and development capacity. The company is a developer and manufacturer of professional card system, we offer a technical service, unlike the traditional trade. And there are strong regional and individual requirements on technical service objective. So we have established a set of user files, including rigorous project management system technology for each project tracking and routine maintenance; and to designate a person responsible for follow-up. Manufacturers promise a quality replacement for three months, one year free maintenance and lifetime maintenance