3BSE008508R1 DI810 | ABB | Surge voltage module

Description

3BSE008508R1 DI810 | ABB | Surge voltage module

In the case of 3BSE008508R1 DI810 contact (switch quantity) output, regardless of whether the PLC itself has anti-interference measures, RC absorption circuit (AC load) or parallel continuous current diode (DC load) should be used to absorb the surge voltage generated by inductive load.
When using transistors or bidirectional thyristor output modules to drive loads such as incandescent lamps, in order to protect the output module, a bypass resistor should be connected in parallel to the PLC output terminal or connected in series with a load current limiting resistor.
According to different interference modes, electromagnetic interference in 3BSE008508R1 DI810 control systems can be divided into common mode interference and differential mode interference. Common mode interference is the potential difference between a signal and ground, mainly formed by the superposition of voltage induced on the signal line by grid connection, ground potential difference, and spatial electromagnetic radiation. The common mode voltage is sometimes relatively high, especially when using distribution devices with poor isolation performance for power supply. The common mode voltage of the transmitter output signal is generally high, and some can reach over 130V. The common mode voltage can be converted into differential mode voltage through asymmetric circuits, directly affecting the measurement and control signal, causing component damage (this is the main reason for the high damage rate of PLC system I/O modules). This common mode interference can be either DC or AC. Differential mode interference refers to the interference voltage acting between the two poles of a signal, mainly caused by the induction of spatial electromagnetic fields between signals and the voltage formed by the conversion of common mode interference by unbalanced circuits. This voltage superimposed on the signal directly affects the measurement and control accuracy. In order to ensure that 3BSE008508R1 DI810 control systems are free from or reduce electromagnetic interference in industrial environments, isolation and shielding methods are generally adopted.