GE 350-E-P1-G1-HECM-3E-DH On site interface module
When budgeting for I/O points, appropriate margins should be considered, usually based on the calculated input and output points. 350-E-P1-G1-HECM-3E-DH can be expanded by an additional 10% to 20%. After the margin, it will be used as input and output point budget data. When placing practical orders for 350-E-P1-G1-HECM-3E-DH, it is also necessary to round the input and output points based on the product characteristics of the manufacturer’s PLC.
If 350-E-P1-G1-HECM-3E-DH is connected in series with a diode in the input contact circuit, the voltage of 350-E-P1-G1-HECM-3E-DH on the series diode should be less than 4V. 350-E-P1-G1-HECM-3E-DH If a reed switch with LED is used, the number of diodes in series cannot exceed two.
350-E-P1-G1-HECM-3E-DH AC output lines and DC output lines should not use the same cable. The output lines should be kept as far away from high-voltage and power lines as possible to avoid parallelism.
Special attention should also be paid to the following points in input wiring:
(1) The input wiring should generally not exceed 30m. But if the environmental interference is small and the voltage drop is not significant, the input wiring can be appropriately longer.
(2) The input and output lines cannot use the same cable, and the input and output lines should be separated.
(3) The width of the pulse signal that the programmable controller can accept should be greater than the time of the scanning cycle.
Output wiring:
(1) Programmable controllers come in three forms: relay output, thyristor output, and transistor output.
(2) The output terminal wiring is divided into independent output and common output. When the output relay or thyristor of the PLC is activated, two output terminals of the same number are connected. Different types and voltage levels of output voltage can be used in different groups. But the outputs in the same group can only use the same type and voltage level of power supply.
(3) Due to the output components of PLC being encapsulated on the printed circuit board and connected to the terminal board, if the load connecting the output components is short circuited, it will burn out the printed circuit board. Therefore, fuse protection should be applied to the output components.
(4) When using relay output, the size of the inductive load it bears affects the working life of the relay, so the relay requires a long working life.
(5) The output load of PLC may generate noise interference, so measures should be taken to control it.
In addition, for hazardous loads that can cause harm to users, in addition to considering them in the control program, external emergency stop circuits should also be designed to cut off the power supply of the load that causes harm when the programmable controller fails.
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