M40160606EN Page 6
M4020161125EN
UI Robot Technology Co. Ltd
UIM24002/04/08
TYPICAL APPLICATION
UIM240xx controller’s wiring is very straightforward as shown in following Figure. Terminal 6 (EN) can be
left open if offline is not needed.
Figure 0-2: Typical Application
OPTICALLY ISOLATED INPUT INTERFACE
UIM240xx controllers’ logic control inputs are all optically isolated. All opto-isolators share one common
anode (VCC) as shown in above schematic diagram. Typically, VCC is 5V. However, 3.3V or voltages
higher than 5V are also acceptable, so long as the current through the opto-isolator’s emitter is between
5~20mA.
Should a voltage higher than 5V be applied to VCC, an additional resistor is needed for every terminal to
ensure that the current through each emitter does not exceed 20mA.
Figure 0-3: Optically Isolated Input Interface
Note, in most situations, VCC can also be used as common cathode connection. This is because the
opto-isolators used in UIM240 are bidirectional (AC&DC) type.
12 ~ 40VDC
Stepper Motor
UIM240XX
DIR
VCC
V+
GND
STP
ENA
User MCU
3.3~5V
Direction
Pulse
Enable
VCC
1
2
3
4
5
6
499
A+
+
A-
B-
B+
UIM240XX
500
5~20mA
VCC
STP, DIR, etc.
3
X
Additional
Resistor
User Device
3.3-24V
