2.6.7 Safety stop function Function description 1 The terminals related to the safety stop function are as follows. 2 3 4 5 *1 In the initial status, terminals S1 and PC, S2 and PC, and SIC and SD are respectively shorted with shorting wires. To enable the safety stop function, remove all the shorting wires, and then connect a safety relay module as shown in the connection diagram. *2 When any fault listed on the next page occurs in the internal safety circuit, the corresponding indication is shown on the operation panel. 6 Terminal So (SO) can be used to display a fault indication and to prevent restarting of the inverter.
The signal output from terminal So (SO) cannot be used to input a safety stop signal to other devices. 7 Connection diagram To prevent restart at failure occurrence, connect terminals So (SO) and SOC to the reset button, which are the feedback input terminals of the safety relay module. 8 9 Inverter R/L1S/L2 T/L3 10 So (SO) SOC Logic +24V IGBTs PC ASIC RESET 24 VDC S2 G G Emergency stop button SIC Safety relay module / Safety programmable controller SD U V W M 83 2. INSTALLATION AND WIRING 2.6 Control circuit Terminal symbol Terminal function description S1*1 Input terminal as the safety stop channel 1.
Status of both the circuit between terminals S1 and SIC and the circuit between terminals S2 and SIC Open: Safety stop is activated. Shorted: Safety stop is not activated S2*1 Input terminal as the safety stop channel 2. SIC*1 Common terminal for S1 and S2. So (SO) Output terminal used for fault detection and fault indication display. The terminal is ON (conducted) while no internal safety circuit failure*2 exists. OFF: Internal safety circuit failure*2 ON: No internal safety circuit failure*2 SOC Open collector output (terminal So (SO)) common NOTE CPU Gate Driver Gate Driver S1