3 Wiring and Connection3.5.3 Sequence Output Circuit3-323.5.3 Sequence Output CircuitThree types of multi-winding drive unit sequence output circuits to a SERVOPACK are available and one typeof SERVOPACK sequence output circuit is available.(1) Multi-Winding Drive Unit Sequence Output Circuits Open-collector Output CircuitCN1 connector pins 37 to 39 (alarm code output) on the multi-winding drive unit are explained below.Alarm code signals (ALO1, ALO2, ALO3) are output from open-collector transistor output circuits. Connectan open-collector output circuit through a photocoupler, relay or line receiver circuit.Note: The maximum allowable voltage and maximum current capacity for open-collector output circuits are as follows.• Voltage: 30 VDC• Current: 20 mA DCIncorrect wiring or incorrect voltage application to the output circuit may cause short-cir-cuit.If a short-circuit occurs as a result of any of these causes, the holding brake will notwork. This could damage the machine or cause an accident resulting in death or injury.Photocoupler Circuit Example Relay Circuit ExampleLine Receiver Circuit Example0 V 0 VMulti-winding drive unit5 to 12 VDCPhotocoupler0 VRelay5 to 24 VDCMulti-winding drive unit0 VMulti-winding drive unit5 to 12 VDC
