GE IC693CHS391 Controller/Module/circuit board MARK VI Spare parts of the system
Brand ABB Color Standard Application Industrial height 296mm rated current 420mA
Protection level IP45 Suitable for motor power 37KW Application Site Power Industry BOM Number GJR2391500R1220 Power industry HIEE401782R0001 Part Number IC693CHS391
Applicable pipe 2 Whether imported is weighing 5.68 kg can be sold nationwide
GE IC693CHS391 Controller/Module/circuit board MARK VI Spare parts of the system
Suppression of interference introduced by input and output circuits
In order to achieve complete isolation of input and output circuits, photoelectric coupling has been widely used in control systems in recent years, and has become an effective measure to prevent interference. optocoupler
The closing device has the following characteristics: first, because it is sealed in a tube shell, it will not be interfered by external light; second, because the light transmits signals, the ground wire between the circuits of various components is cut off
Third, the dynamic resistance of the light-emitting diode is very small, and the internal resistance of the interference source is very large, and the disturbed signal that can be transmitted to the input and output of the photoelectric clutch becomes small; Number four
The transmission ratio of the photosynthesizer is as small as the amplification ratio of the transistor, which is far less sensitive to interference signals, and the light-emitting diode of the photosynthesizer only passes through
At a certain current, it can glow. Therefore, even in the case of interference voltage amplitude higher than a0, because there is not enough energy, still can not make the LED light, so that there can be
Effectively suppress interference signals. Since the linear region of the photoelectric synthesizer can generally only be in a certain range, it should be ensured that the change range of the transmitted signal is always in the linear region. for
To ensure the linear coupling, it is necessary to strictly select the photoelectric coupler and take corresponding nonlinear positive measures, otherwise it will produce a large error.
(1) The photoelectric input circuit is used more, g0 is usually connected to the form, and the low-level input is connected to the form. Differential connection, which has two constraints for preventing
It is suitable for environments with serious external interference. When the current of the external device is large, the transmission distance can reach 100″200m, taking into account the output drive current of the CMS circuit
Small, can not directly drive the LED, so add a y transistor as a power amplifier, it should be noted that the LED and photosensitive transistor in the figure should be provided by two power supplies
Electrical, resistance value depending on the voltage gao low selection.
GE IC693CHS391 Controller/Module/circuit board MARK VI Spare parts of the system
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