DVP201/202/211LC-SL Load Cell Module Operation Manual Thanks for using the load cell module DVP201/202/211LC-SL. To ensure that the product is correctly installed and operated, users need to read the operation manual carefully before they use DVP201/202/211LC-SL. The operation manual provides functional specifications, and introduces installation, basic operation and setting, and the usage of DVP201/202/211LC-SL. DVP201/202/211LC-SL is an OPEN-TYPE device. It should be installed in a control cabinet free of airborne dust, humidity, electric shock and vibration.
To prevent non-maintenance staff from operating DVP201/202/211LC-SL, or to prevent an accident from damaging DVP201/202/211LC-SL, the control cabinet in which DVP201/202/211LC-SL is installed should be equipped with a safeguard. For example, the control cabinet in which DVP201/202/211LC-SL is installed can be unlocked with a special tool or key. DO NOT touch any terminal when DVP201/202/211LC-SL is powered up. In order to prevent the product from being damaged, or prevent staff from being hurt, users need to read the operation manual carefully, and follow the instructions in the manual.
1.1 Principle of a Load Cell If a metallic material undergoes tension or strain, it will become thin, and its electrical impedance will increase. If a metallic material is compressed, its electrical impedance will become small. A strain gauge adopting this principle is called a load cell. Such sensing device is able to convert physical pressure into electrical signals, and therefore it is widely used on occasions on which loads, tension and pressure need to be converted into electrical signals. 1.2 Introduction of a Load Cell A load cell module provides 4-wire or 6-wire load cells with various eigenvalues. Therefore, its response time can be adjusted according to users’ requirements.
On this basis, the requirements of load application markets can be easily met. Besides, a DVP series PLC* can read data in a load cell module or write data to a load cell module by means of the instruction FROM/TO. *: DVP-SV series PLCs, DVP-EH2-L series PLCs, DVP-SA2 series PLCs, and DVP-SX2 series PLCs support left-side extension modules.
1.3 Functional Specifications 1-2 DVP201/202/211LC-SL Load cell module Voltage output Rated supply voltage/Power 24 V DC (-15 to +20%)/5 W consumption Static minimum/maximum 20.4 V/28.8 V DC voltage Dynamic minimum/maximum 18.5 V/30.2 V DC voltage Maximum current consumption 150 mA Input signal range ±200 mV DC Sensibility +5 V DC +/-5% Resolution Data output: 32 bits Highest precision 0.04% Communication interface RS-232, RS-485 Applicable sensor type 4-wire or 6-wire load cell Expanding a temperature ≤ ± 20 ppm/K v.
E coefficient Reducing a temperature ≤ ± 0.1 μV/K coefficient to zero Linearity error ≤ 0.015% Response time 2.5, 10, 16, 20, 50, 60, 100, 200, and 400ms Eigenvalue applicable to a load 0~1, 0~2, 0~4, 0~6, 0~20, 0~40 and 0~80 mV/V cell