OFF at full close. OFF at full open. �D-�E is ON at slightly before full open. �D-�F is ON at slightly before full closed. SLS-1 Closed Limit SLS-2 Closed No-voltage OLS-2 Open No-voltage Open Limit OLS-1 Closed Open 5 6 7 Open lamp Closed lamp OLS−2 SLS−2 Output contact limit switch on open side Output contact limit switch on closed side Space heater (optional) Actuator Open Stop Closed OLS−1 SLS−1 Thermal protector 1 2 3 4 Open Open lamp Closed lamp Stop Closed Space heater OLS−1 OLS−2 SLS−2 SLS−1 Thermal protector Actuator Output contact limit switch on open side Output contact limit switch on closed side OFF at full close. OFF at full open. �J-�L is ON at slightly before full open. �M-�O is ON at slightly before full closed. SLS-1 Closed Limit SLS-2 Closed No-voltage OLS-2 Open No-voltage Open Limit OLS-1 Closed Open 141 ACTUATOR / ELECTRIC TYPE T BALL VALVE TYPE 21, 21α 15mm - 50mm BALL VALVE TYPE 21, TYPE 21α 65mm-100mm BUTTERFLY VALVE TYPE 57 40mm - 350mm BUTTERFLY VALVE TYPE 55 50mm - 250mm ROTARY DAMPER 40mm - 400mm