REXROTH VM310

Description

Manufacturer: REXROTH

Model: VM310

Shipping weight: 5Kg

Quantity: 1

Warranty period: from 1 year

Imported: Yes

Available for sale: worldwide

Grounding is one of the effective means to improve the electromagnetic compatibility (EMC) of electronic equipment. Correct grounding can not only suppress the influence of electromagnetic interference, but also suppress the outward interference of equipment; On the contrary, the wrong grounding will introduce serious interference signals and make the PLC system unable to work normally. The ground wire of PLC control system includes system ground, shielding ground, AC ground and protection ground. The disturbance of the grounding system chaos to the PLC system is mainly caused by the uneven distribution of potential at each grounding point, and the existence of ground potential difference between different grounding points, which causes the ground loop current and affects the normal operation of the system. For example, the cable shielding layer must be grounded at one point. If both ends A and B of the cable shielding layer are grounded, there is a ground potential difference, and there is current flowing through the shielding layer. When abnormal conditions and lightning strikes occur, the ground wire current will be greater.

In addition, the shielding layer, the grounding wire and the earth may form a closed loop. Under the effect of changing magnetic field, there will be induced current in the shielding layer, which will interfere with the signal loop through the coupling between the shielding layer and the core wire. If the system grounding is confused with other grounding, the generated ground circulation may produce unequal potential distribution on the ground wire, affecting the normal operation of logic circuit and analog circuit in PLC. The logic voltage interference tolerance of PLC operation is low, and the distribution interference of logic ground potential easily affects the logic operation and data storage of PLC, resulting in data confusion, program flight or crash. The distribution of simulated ground potential will lead to the decline of measurement accuracy and cause serious distortion and misoperation of signal measurement and control.