Tallinn Science Park Tehnopol,
Akadeemia tee 21/6, Tallinn 12618, Estonia
Phone: + 372 6559914,
e-mail: sale@smd.ee
url: http://smd.ee
1. Product designation
Step motor controller SMD-4.2DIN ver.2 is an electronic device designed to operate with 2 or 4-phase stepper motor with maximum
current per phase up to 4.2 Amp.
2. Functions and possibilities
· Pulse position control with standard logic low level voltage signals 0…1VDC and high level voltage signals 4…5VDC (up to 24VDC
on condition that additional current limiting resistances are used) «STEP», «DIR» and «ENABLE» is provided;
· Analog speed control is provided: using internal or external potentiometers or analog voltage signal 0..5VDC;
· Analog position control (motor shaft rotation angle) is provided: using internal or external potentiometers or analog voltage signal
0..5VDC;
· Automatic source voltage control – if the power supply falls outside the allowance range (less than 20VDC or more than 51VDC)
when the driver is switched on or within 2 seconds during operation, the driver turns off motor phases, outputs the alarm and indicate
the alarm code by LED flashing;
· All operation settings are done via USB connection through software at a computer;
· The driver is equipped with an internal brake resistor. External brake resistor can be connected as well if needed;
· Control of a known state of the driver and output of the relevant signal FAULT;
· Alarm sound, indication of a code of the alarm by the LED at the front panel and inversion of FAULT output signal are provided.
3. Technical characteristic
Table
Common characteristics:
Maximum output current per phase, Amp
Minimum output current per phase, Amp
Microstepping
In the current control mode
In the voltage control mode additionally: 1/32, 1/64, 1/128
Maximum overall dimensions, mm
(24VDC on condition of using additional current limiting resistors)
resistance, kOhm, no less
resistance, kOhm, no less
nput current of control input STEP, mA
Input current of control inputs
Output «FAULT» parameters
Signal type Opto-coupler output
Maximum voltage, VDC 48
Maximum load current, mA 50
Resistance at close contact, Ohm, no more 100
Environmental Conditions:
Ambient Temperature: 0…+40°C
Humidity: 90% RH or less upon condition +25°C
Condensation and freezing: none
Pressure: 650…800 mm of mercury
4. Construction
The controller SMD-4.2DIN ver.2 is designed as a circuit plate with electronics components, indication and control elements,
terminals and connectors. The plastic case of the driver is designed to be mounted on a DIN rail. The heatsink is installed inside the case
on the circuit plate. There are graphical symbols of the control elements and the terminals assignment on the front plate of the controller.
Besides the control elements at the driver frame there are:
· connector A for a stepper motor phases connection (fig. 1);
· connector B for a power supply and external braking resistor connection (fig.1);
· connector C for connection of control signals STEP, DIR, ENABLE (fig.1);
· connector D for connection of an external potentiometer or source of analog signal 0…+5VDC – to analog speed or position control,
and for connection of the output signal FAULT (fig.1);
· internal potentiometer SPEED for analog speed or position control (fig.1);
· bicolour LED for indication of control modes and alarm codes;
· Button START/STOP;
· USB input – for connection to a PC.
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