Xp313 voltage signal input card is an intelligent 6-channel analog signal acquisition card with analog signal modulation. Each channel can be separately configured and receive various types of thermocouples and voltage signals, convert them into digital signals, and send them to the main control card xp243x through data transfer card xp233.
The six channel signal processing of xp313 card is divided into two groups, of which channels 1, 2 and 3 are one group and channels 4, 5 and 6 are two groups. The signal dispatching in the same group is powered by the same isolated power supply. The power supply and signals between the two groups are isolated from each other and are isolated from the power supply of the control station. Xp314 card can work alone or in redundant mode. In redundant configuration, the working card and standby card can sample and process signals at the same point at the same time, and can switch without disturbance. The card has the function of self diagnosis. While sampling and processing signals, it is also performing self inspection. During card redundancy configuration, once the work card detects a fault, it will immediately give the work right to the standby card, and light the fault light to alarm and wait for processing. The working card and the standby card sample and process the signals at the same point at the same time, and switch without disturbance. When the card works with a single card, once an error is detected in the self-test, the card will also turn on the fault light for alarm. The user can configure the xp313 card through the upper computer to decide what signal to process, and can change it online at any time, which is convenient and flexible.
Xp313 has the function of cold end temperature acquisition when collecting thermocouple signals. It can collect a thermistor signal. The acquisition range is a greenhouse between (- 50 ~ + 50) ℃, and the cold end temperature error is ≤ 1 ℃. The measurement of cold end temperature can also be completed by data transfer card xp233. When the main control card sets the cold end as "local" in the configuration, the main control card uses the cold end temperature collected by the I / O card (xp314) for signal processing, that is, each thermocouple signal acquisition card samples the cold end temperature respectively, and the cold end temperature measuring element is installed at the bottom of the I / O unit terminal (not extendable), At this time, the compensation wire extends from the field to the wiring terminal of I / O unit; When the main control card sets the cold end to "remote" in the configuration, the data is transferred to xp233 to collect the cold end temperature for signal processing.
The user can configure the xp313 card through the upper computer, select the signal type to be processed, and change it online at any time, which is convenient and flexible.
This article is provided by the central control DCS card of Zhejiang University. Our website is: http://www.jnacg.com
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