EM600 High-Performance Vector Control Inverter User Manual Figure 3-17 Wiring of Multi-function Input Terminals Note: Wiring of relay output terminal of short-circuiting bar between 24V power supply and PLC terminal must be removed, when using an external power supply. Absorption circuit of surge voltage shall be installed to drive inductive load (for example relay and contactor), for example RC absorption circuit (please note that the leakage current shall be less than holding current of contactor or relay under control), VDR and fly-wheel diode (for DC electromagnetic circuit, please pay attention to the polarity at installation).
Components of absorption circuit shall be installed near two sides of relay or contactor coil. 3.3.6 Wiring of Multi-function Output Terminal Y1 and Y2 can be powered by internal 24V or external supply. See Figure 3–18. 41 A. NPN mode with internal power supply (+24Vdc) 24V PLC COM K1 X1 K2 X2 K3 X3 K4 X4 K5 X5 K6 X6 K7 X7 B. PNP mode with external power supply (+24Vdc) 24V PLC COM K1 X1 K2 X2 K3 X3 K4 X4 K5 X5 K6 X6 K7 X7 C. NPN mode with external power supply 24V - + PLC DC 24V COM K1 X1 K2 X2 K3 X3 K4 X4 K5 X5 K6 X6 K7 X7 D. PNP mode with external power supply 24V + - PLC DC 24V COM K1 X1 K2 X2 K3 X3 K4 X4 K5 X5 K6 X6 K7 X7