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Relay Relay Load Load Load Load Load Load Load Load Blue Black Brown Auto switch 2 Blue Black Brown Auto switch 1 Blue Black Brown Auto switch 2 Blue Black Brown Auto switch 1 Blue Black Brown Auto switch 2 Blue Black Brown Auto switch 1 Blue Black Brown Auto switch 2 Blue Black Brown Auto switch 1 Blue Brown Auto switch 2 Blue Brown Auto switch 1 Blue Black Brown Auto switch 2 Blue Black Brown Auto switch 1 Blue Brown Auto switch 2 Blue Brown Auto switch 1 Blue Black Brown Auto switch 2 Blue Black Brown Auto switch 1 Input COM COM COM COM Input Input Input Blue Brown Blue Brown Blue Black Brown Blue Black Brown Auto switch Auto switch Auto switch Auto switch * When using solid state auto switches, ensure the application is set up so the signals for the first 50 ms are invalid. Connect according to the applicable PLC input specifications, as the connection method will vary depending on the PLC input specifications. Because there is no current leakage, the load voltage will not increase when turned OFF. However, depending on the number of auto switches in the ON state, the indicator lights may sometimes grow dim or not light up, due to the dispersion and reduction of the current flowing to the auto switches. When two auto switches are connected in parallel, malfunction may occur because the load voltage will increase Auto switches with load when in the OFF state. voltage less than 20 V cannot be used. When two auto switches are connected in series, a load may malfunction because the load voltage will decline when in the ON state. The indicator lights will light up when both of the auto switches are in the ON state. (Solid state) (Reed) Example: Load impedance is 3 kW. Leakage current from auto switch is 1 mA. Load voltage at OFF = Leakage current x 2 pcs. x Load impedance = 1 mA x 2 pcs. x 3 kW = 6 V Example: Power supply is 24 VDC Internal voltage drop in auto switch is 4 V. Load voltage at ON = Power supply voltage . Residual voltage x 2 pcs. = 24 V . 4 V x 2 pcs. = 16 V Prior to Use Auto Switch Connection and Example 3-wire, NPN 2-wire 3-wire, PNP 2-wire (PLC internal circuit) (PLC internal circuit) (PLC internal circuit) (PLC internal circuit) 3-wire AND connection for NPN output (Using relays) (Performed with auto switches only) 3-wire OR connection for NPN output 3-wire AND connection for PNP output (Using relays) (Performed with auto switches only) 3-wire OR connection for PNP output 2-wire AND connection 2-wire OR connection Sink Input Specifications Example of AND (Series) and OR (Parallel) Connection Source Input Specifications 105