STAC6 Drives and Microstepping Motors:
User Manual
(Discontinued Product)
• 1.18 •
1:
H A R D W A R E
Figure 1.13: Connecting the Master Encoder
USING HIGH SPEED INPUTS WITH 12-24 VOLT
SIGNALS
Most PLCs don’t use 5 volt logic. Signal levels as high as 24 volts
can be connected to the STEP and DIR inputs if external dropping
resistors are added, as shown below.
• For 12 volt logic, add 820 ohm, 1/4 watt resistors
• For 24 volt logic, use 2200 ohm, 1/4 watt resistors
WARNING: The maximum voltage that can be applied directly to
a high speed input terminal is 5 volts. Never apply high voltage
AC to an input terminal.
Figure 1.14: Connecting to PLC with Sourcing (PNP) Outputs
(most PLC's use 24 volt logic)
!
