3.4 Examples of Connection to Host Controller3-333 Wiring and Connection3.4.2 Sequence Input CircuitCN1 connector terminals 40 to 47 are explained below.The sequence input circuit interface connects through a relay or open-collector transistor circuit. Select a low-current relay otherwise a faulty contact will result.Note: The 24 VDC external power supply capacity must be 50 mA minimum.For SEN input signal circuit, refer to 5.9.2 Standard Connection Diagram and Setting the Absolute DataRequest Signal (SEN).The SERVOPACK’s I/O circuit uses bidirectional photocoupler. Select either the sink circuit or the source cir-cuit according to the specifications required for each machine.Note: • The Connection examples in 3.2.4 to 3.2.6 show sink circuits.• The ON/OFF polarity differs between when a sink circuit is connected and when a source circuit is connected.Relay Circuit Example Open-collector Circuit ExampleSink Circuit Source CircuitInput Signal Polarities Input Signal PolaritiesSignal Level VoltageLevel Contact Signal Level VoltageLevel ContactON Low (L)level 0 V Close ON High (H)level 24 V CloseOFF High (H)level 24 V Open OFF Low (L)level 0 V Open3.3 kΩ/S-ON, etc.SERVOPACK24 VDC +24VIN +24 VIN 3.3 kΩ/S-ON, etc.SERVOPACK24 VDCSERVOPACK input24 V+ −24 V+ − SERVOPACK input
