
Block Diagram STM17S, STM17Q
IO Functions (congure in software)
STEP (5 to 24 Volts) DIR (5 to 24 Volts) EN (5 to 24 Volts) OUT (30V, 80mA)
Step Input Dir Input Enable Input Brake Output
Jog CW Jog CCW Reset Input Alarm Output
Limit CW Limit CCW Change Speed Motion Output
Start/Stop General Purpose General Purpose Tach Output
General Purpose General Purpose
MOSFET
PWM
Power
Amplifier
12-48 VDC
External
Power Supply
Voltage
Temp
Det.
Over
Current
Det.
motor
encoder
5 Volt DC
Power Supply
DSP
Driver
Controller
3.3VDC
Internal
Logic
Supply
Optical
Iso
I/O Connector
+
Optical
Iso
Optical
Iso
STEP+
+5VDC (50mA MAX)
GND
Digital
Filter
Digital
Filter
Digital
Filter
Software
Filter
Software
Filter
Software
Filter
Status
AIN
Optical
Iso
RS-232 or RS-485
Comm
Conn
Power
Conn
GND
+5V
STEP-
DIR+
DIR-
EN+
EN-
OUT+
OUT-
RS-232
TX, RX, GND, +5V
or
RS-485
RX+, RX-, TX+, TX-, GND
-
Optional
4
STM17 Hardware Manual
920-0034 rev A
9/30/2010
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