Sure
Step
TM
Stepping Systems User Manual
3–9
Chapter 3:
Sure
Step
TM
STP-DRV-4035 Microstepping Drive
5th Ed., Rev. B 01/2019
Using Logic That is Not 5 volt TTL Level
Some step and direction signals, especially those of PLCs, don’t use 5 volt logic.
You can connect signal levels as high as 24 volts to the SureStep drive if you add
external dropping resistors to the STEP, DIR and EN inputs, 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
Connecting to an Indexer with Sink or Source 12-24 VDC Outputs
Connecting to a PLC with Sink or Source 12-24 VDC Outputs
Note: Most PLCs can use 24 VDC Logic.
The Enable Input
The
ENABLE
input allows the user to turn off the current to the motor by providing
a positive voltage between EN+ and EN-. The logic circuitry continues to operate,
so the drive “remembers” the step position even when the amplifiers are disabled.
However, the motor may move slightly when the current is removed depending on
the exact motor and load characteristics.
Note: If you have no need to disable the amplifiers, you don’t need to connect anything
to the
ENABLE
input.
Connecting to Indexer with 12 - 24 VDC Sinking Outputs - stretched
+12-24V
DIR+
DIR
DIR–
STEP+
STEP
STEP–
Indexer
with
Sinking
Outputs
R
R
STP-DRV-4035
Drive
EN+
EN–
R
ENABLE
(If enable function is used)
Connecting to PLC with 12 - 24 VDC Sinking Outputs - stretched
+12-24V
DIR+
DIR
DIR–
STEP+
STEP
STEP–
PLC
with
Sinking
Outputs
R
R
STP-DRV-4035
Drive
EN+
EN–
R
ENABLE
(If enable function is used)
+
–
COM
12-24 VDC
Connecting to Indexer with 12 - 24 VDC Sourcing Outputs - stretched
COM
DIR–
DIR
DIR+
STEP–
STEP
STEP+
Indexer
with
Sourcing
Outputs
R
R
STP-DRV-4035
Drive
EN–
EN+
R
ENABLE
(If enable function is used)
Connecting to PLC with 12 - 24 VDC Sourcing Outputs - stretched
COM
DIR–
DIR
DIR+
STEP–
STEP
STEP+
PLC
with
Sourcing
Outputs
R
R
STP-DRV-4035
Drive
EN–
EN+
R
ENABLE
(If enable function is used)
+
–
+12-24V
12-24 VDC
