43[Preparation]PreparationInterface CircuitInput CircuitOutput Circuit• Connect to contacts of switches and relays, or open collec-tor output transistors. • When you use contact inputs, use the switches and relaysfor micro current to avoid contact failure. • Make the lower limit voltage of the power supply (12 to 24V)as 11.4V or more in order to secure the primary current forphoto-couplers.Connection to sequence input signalsSI 12 to 24V 1 COM+4.7kΩ SRV-ON etc.Relay1 COM+4.7kΩ 12 to 24VSRV-ON etc.R [kΩ] =VDC [V]– 2.5[V] 1012 to 24VCOM– 17ALM, COIN etc.SO1Max. rating 30V,50mA12 to 24VCOM– 17ALM, COIN etc.SO1Max. rating 30V,50mAInstall toward the direction.or• The output circuit is composed of open collector transistoroutputs in the Darlington connection, and connect to relays orphoto-couplers. • There exists collector to emitter voltage, V CE (SAT) of approx.1V at transistor-ON, due to the Darlington connection of theoutput or. Note that normal TTL IC cannot be directly connec-ted since it does not meet VIL. • There are two types of output, one which emitter side of theoutput transistor is independent and is connectable individual-ly, and the one which is common to – side of the control pow-er supply (COM–). • If a recommended primary current value of the photo-coupler is10mA, decide the resistor value using the formula of the right Fig.Sequence output circuitSO1• Feeds out the divided encoder outputs (A, B and Z-phase) indifferential through each line driver. • At the host side, receive these in line receiver. Install a termi-nal resistor (approx. 330Ω) between line receiver inputs with-out fail. • These outputs are not insulated.Line driver (Differential output) outputPO1• Feeds out the Z-phase signal among the encoder signals inopen collector. This output is not insulated. • Receive this output with high-speed photo couplers at thehost side, since the pulse width of the Z-phase signal is nar-row.Open collector outputPO2For the recommended primary current value, refer to the data sheet of apparatus or photo-coupler to be used.AM26LS32 or equivalent AM26LS31 or equivalentABZ1211OA+OA– OZ+OZ– OB+OB– 13926GND1014Connect signal ground of the host and the driver without fail.1626CZMax. rating 30V, 50mAGNDHigh speed photo-coupler (TLP554 by Toshiba or equivalent)represents twisted pair.represents twisted pair.
