Yaskawa F7 Drive Technical Manual Orientation - Manual (Page 14)

Date: 03/03/06, Rev: 06-03 Page 14 of 16 TM.F7SW.063
6.4 Using an External Switch Instead of the Marker Pulse
The PG-X2 and PG-W2’s marker pulse (Z pulse) input requires a line driver type circuit. The following
diagram shows an example of how a +12VDC current sinking (open collector NPN) switch can be used to
trigger the marker pulse input of the encoder feedback card. An external power supply may be required. For
best noise immunity, locate the resistor network at the switch, not at the encoder feedback card. Please
note that the switch must be able to handle at least 22mA of current draw. For exact application wiring,
consult Yaskawa Application Engineering with the exact switch specification.
560 Ohm
1/2 Watt
Each
External
Marker
Switch
+12VDC Supply
OV Common
Z+ Marker Pulse Input
Z- Marker Pulse Input
Power Supply
Encoder Feedback Card
+
-
Twisted Pair
Twisted Pair
Use 4-wire cable with 2 twisted
pairs and 1 overall shield.
External Marker Pulse Wiring
Wiring Example of External Marker (Orientation) Pulse Sensor