�燦ith power saving circuit Compared to the standard products, power consumption is reduced down to approx. 1/3 (in case of SJ3�ｭ60T) by cutting the unnecessary wattage required to hold the valve in an energized state. (Effective energizing time is over 67 ms at 24 VDC.) Caution Light/Surge Voltage Suppressor If a valve is energized continuously for a long time, the rise in temperature due to heat-up of the coil may cause a decline in solenoid valve performance, reduce service life, or have adverse effects on peripheral equipment. If a valve will be energized continuously, please be sure to use the “Continuous duty type” with a power saving circuit. In particular, there will be a large increase in temperature if 3 or more neighboring stations are simultaneously continuously energized for a long time, or if the A and B sides are simultaneously continuously energized for a long time in a dual 3 port valve. Please be very careful in such cases. If the continuously energized time exceeds three hours, contact SMC. Continuous Duty �燦hen using a 4 port valve as a 3 port valve The SJ2000/3000 series can be used as normally closed (N.C.) or normally open (N.O.) 3 port valves by plugging one of the cylinder ports 4(A) or 2(B). However, exhaust ports should be left open. It is convenient when a double solenoid 3 port valve is required. Caution Caution When Using a 4 Port Valve as a 3 Port Valve Plug position 2(B) port N.C. 4(A) port Type of actuation N.O. Double Number of solenoids Single �晒on-polar type Single solenoid Electric circuit diagram (with power saving circuit) In case of positive common, single solenoid Double solenoid, 3 position type Single solenoid Double solenoid, 3 position type �傘ositive common Single solenoid Double solenoid, 3 position type �晒egative common In case of negative common, single solenoid (EA)5 1 (P) 3(EB) (A)4 2(B) (A)4 2(B) 1 (P) (EA)5 3(EB) (EA)5 1 (P) 3(EB) (A)4 2(B) (A)4 2(B) 1 (P) (EA)5 3(EB) Zener diode Zener diode LED Coil LED Coil SOL.b (., +) COM (+, .) SOL.a (., +) Zener diode LED Coil SOL.a (., +) COM (+, .) Coil Coil LED (Orange) Coil Polarity protection diode LED (Green) [SOL.b] (+) [SOL.a] (+) COM (.) LED (Orange) Polarity protection diode [SOL.a] (+) COM (.) Coil Coil LED (Orange) Coil Polarity protection diode LED (Green) [SOL.b] (.) [SOL.a] (.) COM (+) LED Polarity protection diode [SOL.a] (.) COM (+) i1 LED i1: Inrush current, i2: Holding current i2 (+) (.) Coil Diode Timer circuit LED i1: Inrush current, i2: Holding current i2 i1 (.) (+) Coil Diode Timer circuit Polarity protection diode Not included with 12 VDC specifications. Polarity protection diode Not included with 12 VDC specifications. 114 Series SJ2000/3000 Specific Product Precautions 2 Be sure to read before handling. Refer to front matter 53 for Safety Instructions and pages 3 to 8 for 3/4/5 Port Solenoid Valve Precautions.