MOTOROLA MVME7100 Isolation Transformer

MOTOROLA MVME7100 Isolation Transformer

MVME7100 for electromagnetic interference is strong, and the PLC reliability requirements are high occasions, PLC power supply should be separated from the power supply and control circuit power supply; if necessary, the use of isolation transformer power supply with shielding, series LC filtering circuits and so on. In the design, the external DC power supply should be a regulated power supply, power supply power should be left 20% to 30% of the margin. For the DC power supply provided by the controller itself, the maximum current it can provide should be understood to prevent damage to the equipment caused by overcurrent.

Good grounding of the MVME7100 is a prerequisite for normal operation. In the design, PLC grounding should be separated from the power equipment grounding, the use of dedicated grounding; such as can not be separated from the ground, should be used to share grounding; absolutely prohibit the use of common grounding methods. As shown in Figure 1, the grounding point should be as close as possible to the PLC, the wire diameter of the grounding wire should be greater than 4mm2, and the grounding resistance should generally be less than 10Ω.