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OFS350 Open Frame Ministepper Drive : 3.5Apk / 12-42 Vdc
Brand: Parker HannifinThe OFS350 series of open-frame ministepping drives offer a 3.5A output with a resolution of 400-12,800 steps/rev, a step phase sequencer with MOSFET three-state switching amplifiers and opto-isolated circuits.
The amplifier regulates motor current by chopping at a constant, inaudible frequency.
Phase current is selected from 32 levels by a DIP switch, which also controls the microstepping resolution.
The OFS350-DRI ministepper drive accepts industry standard step and direction command signals from an external control source.
The OFS350-OSC drive additionally adds an on-board clock source and includes five optically isolated inputs, external speed control, tach output, and internal pots for accel/decel rate along with high- and low-speed range selection.
Both versions of the drive include a selectable automatic feature to lower the motor current by 50% whenever the motor is left at rest for more than one second.
There is also a switch-selectable self test mode that rotates the motor one-half a revolution in each direction at 100 steps per second.
FeaturesOFS350 Open Frame Ministepper Drive - Common Features:
- Drive Input Supply : 12...42VDC
- Output Current : 2.47 Arms / 3.5 Apk
- Resolution : 400, 1000, 2000 and 12,800 steps/rev
- Switch selectable idle current reduction, 0 or 50%
- Optically Isolated 5VDC Inputs for Step, Direction and Enable (OFS350-DRI)
- Optically Isolated 5–12 VDC Inputs (OFS350-OSC)
- Enable Input (to turn off current to the motor)
- Self Test (switch selectable)
- Screw Terminal Connectors.
- MOSFET, Dual H-Bridge, Inaudible PWM Amplifier
- 3 State, Pulse Width Modulated Current Control (switching at 20–30 KHz)
- Drives 4, 6 or 8 Lead / Size 11, 14, 17, 23 or 34 Step Motors
- CE compliant
OFS350-OSC Specific Features:
- Run Input : directs drive to run or stop
- Direction Input : sets direction of rotation
- Speed Input : selects high speed (25rps) or low speed (5rps) range
- Wiper Input : 0–5V analog for external speed signal, pot or joystick
- Tach Output : 5–24V optically isolated, 100 pulses per revolution
- Three Internal Trimmer Pots :
- Accel/Decel (1–250 rev/sec/sec)
- Low Speed (0–5 rps)
- High Speed (0–25 rps)
- External Speed, Pot or Joystick 3 Terminal Type, 1k–10k ohms
Specifications
Brand
Approvals & Certifications
- CE (EMC & LVD) UL Recognised, cUL Recognised
Communication Interface
- N/A
Continuous Output Current Rating
- 2.5 A RMS / 3.5 A Pk
Drive Format
- Single Axis Technology
Features
- Automatic Standby Current ReductionIntegral Pulse Source (OFS350-OSC Only)
Input Supply Voltage
- 12 - 42 Vdc
Maximum Resolution (Steps/Rev)
- 12800
Modes of Control
- Step / Direction Command Input Analog Command Input (OFS350-OSC Only)
Operating Temperature (°C)
- 0° to 50° C
Operating Temperature (°F)
- 32° to 122° F
Product Type
- Stepper Drive
Recommended Motor Inductance
- 1.0 MH (Min.)
Series
- OFS350