Panasonic A4P Series instruction manual Interface Circuit, Input Circuit, Output Circuit

[Preparation]

Interface Circuit

Input Circuit

SI Connection to sequence input signals

•Connect to contacts of switches and relays, or open collec- tor output transistors.￿

•When you use contact inputs, use the switches and relays for 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 for photo-couplers.

12 to 24V	1	COM+4.7kΩ￿
		SRV-ON etc.	Preparation
	Relay
12 to 24V
	1	COM+4.7kΩ￿

SRV-ON etc.

Output Circuit

SO1 Sequence output circuit

•The output circuit is composed of open collector transistor outputs in the Darlington connection, and connect to relays or photo-couplers.￿

•There exists collector to emitter voltage, VCE (SAT) of approx. 1V at transistor-ON, due to the Darlington connection of the output 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 the output 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 is 10mA, decide the resistor value using the formula of the right Fig.

			Install toward the direction.
			SO1
12 to 24V			ALM, ￿
			COIN etc.
			17 COM–￿
			Max. rating 30V,50mA
			or
			SO1
12 to 24V			ALM, ￿
			COIN etc.
			17 COM–￿
	VDC[V]– 2.5[V] ￿
R [kΩ] =		10	Max. rating 30V,50mA

For the recommended primary current value, refer to the data sheet of apparatus or photo-coupler to be used.

PO1 Line driver (Differential output) output

•Feeds out the divided encoder outputs (A, B and Z-phase) in differential 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.

represents twisted pair.

AM26LS32 or equivalent	AM26LS31 or ￿
	11	equivalent
OA+
		A
OA–￿	12
OB+	13	B
OB–￿	14
OZ+	9	Z
OZ–￿	10
GND	26

Connect signal ground of the host ￿ and the driver without fail.

PO2	Open collector output			Max. rating 30V,￿
• Feeds out the Z-phase signal among the encoder signals in				50mA
open collector. This output is not insulated.￿			16	CZ
• Receive this output with high-speed photo couplers at the
host side, since the pulse width of the Z-phase signal is nar-		High speed ￿	26	GND
row.
	represents twisted pair.	photo-coupler ￿
		(TLP554 by Toshiba or equivalent)
				43