10
11
Rev:5.0
6/08/2010
Rev:5.0
6/08/2010
MSST5/10-S UserManual
MSST5/10-S UserManual
3.4.3 High Speed Input
PLCs do not commonly use 5 volt logic. Signal levels as high as 24 volts may 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 termi-
nal is 5 volts. Never apply high voltage AC to an input terminal.
PLC
with
Sinking
Outputs
Drive
+12-24V
DIR
STEP
DIR+
R
R
DIR-
STEP+
STEP-
Connecting to PLC with Sinking (NPN) Outputs
(Most PLCs use 24V logic)
+24VDC
Power
Supply
Drive
+
-
DIR+
2200
direction switch
run/stop switch
(closed=run)
2200
DIR-
STEP+
STEP-
Using Mechanical Switches at 24 V
PLC
with
Sourcing
Outputs
Drive
+12-24V
OUT1
OUT2
GND
DIR+
R
R
STEP-
STEP+
DIR-
Connecting to PLC with Sourcing (PNP) Outputs
(Most PLCs use 24V logic)
