EM500 Open-Loop Vector Control Inverter User Manual following: Note: Wiring of relay output terminal of the short-circuiting bar between 24V power supply and PLC terminal must be removed, before using an external power supply. Figure 3-17 Wiring of Multi-function Input Terminals Absorption circuit of surge voltage should be installed to drive the inductive load (for example relay and contactor), for example RC absorption circuit (please note that the leakage current should be less than the holding current of the 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 should be installed near two sides of relay or contactor coil. 52 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