3 Wiring and Connection3.4.3 Sequence Output Circuit3-343.4.3 Sequence Output CircuitThere are four types of SERVOPACK output circuits:(1) Open-collector Output CircuitCN1 connector terminals 37 to 39 (alarm code output) 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 current capacities for open-collector output circuits are as follows.• Voltage: 30 VDC• Current: 20 mA DC(2) Photocoupler Output CircuitPhotocoupler output circuits are used for servo alarm (ALM), servo ready (/S-RDY), and other sequence out-put signal circuits. Connect a photocoupler output circuit through a relay or line receiver circuit.Note: The maximum allowable voltage and current capacities for photocoupler output circuits are as follows.• Voltage: 30 VDC• Current: 5 to 50 mA DCPhotocoupler Circuit Example Relay Circuit ExampleLine Receiver Circuit Example0 V 0 VSERVOPACK5 to 12 VDCPhotocoupler0 VRelay5 to 24 VDCSERVOPACK0 VSERVOPACK 5 to 12 VDCRelay Circuit Example Line Receiver Circuit Example0 VRelay5 to 24 VDCSERVOPACK SERVOPACK 5 to 12 VDC
