STAC6-Srs-Stepper-Drives

Supported Applications

The STAC6 Series are high-performance stepper drives with an integrated AC power supply, designed for demanding motion-control applications. A MOSFET, dual H-bridge, 4 quadrant amplifier drives the motor, while configurable idle current reduction and multiple control modes make the drive flexible across machine-automation tasks.

• Pulse and Direction control from an external indexer or controller
• Analog Command Signal control
• Host Command via RS232/485 for networked and PC-driven systems

The drives are MADE IN USA and CE marked. They are recommended for use with NEMA 23 and NEMA 34 stepper motors such as the OMHT23-550 (255 oz-in holding torque), OMHT34-488 (650 oz-in) and OMHT34-490 (1845 oz-in).

Operating Conditions & Performance

The STAC6 runs from a 90 to 135 Vac input (nominal 120 Vac, 50/60 Hz), with STAC6-S-220V and STAC6-Si-220V models available with a 220 Vac power supply, producing a nominal 165 Vdc DC bus. Current control is 4 state PWM at 20 KHz with an output current of 0.5 to 6.0 A in 0.01 A increments, and a built-in regeneration circuit rated 25 W max.

• Resolution: software selectable from 200 to 51,200 steps/rev in increments of 1 step/rev.
• Step and Direction inputs: optically isolated 5 to 12V, minimum pulse width 200 ns, maximum pulse frequency 2 MHz.
• Speed range: up to 133 rps depending on selected resolution.
• Encoder option: differential line receivers suitable for 200 KHz or greater.
• Ambient temperature: 0 to 55°C, humidity 90% non-condensing.

Protection covers over/under-voltage, over-temperature, external output shorts (phase-to-phase, phase-to-ground) and internal amplifier shorts. The drive measures 252 mm x 60 mm x 187 mm and connects through a DB-25 I/O connector, with the optional MMI-01 operator interface carrying a NEMA 4/12 (IP56/52) rating.

Configuration Options

The two base models differ by on-board intelligence and I/O capacity, and each is offered in a standard 120 Vac or a 220 Vac power version.

• STAC6-S is a pulse-and-direction / analog drive with 7 Digital Inputs (two 5V, five 12 to 24V), 3 Digital Outputs at 30V and 2 Analog Inputs at ±10V.
• STAC6-Si adds the Si Programmer for stand-alone stored programs and expands I/O to 15 Digital Inputs (two 5V, thirteen 12 to 24V) and 7 Digital Outputs at 30V.
• The 220 Vac versions replace the standard supply for higher line-voltage installations.

For I/O wiring, the OMBOB-1 breakout box is compatible with all STAC6 models while the OMBOB-2 is compatible with the STAC6-Si. The HUB 444 SiNet Hub connects up to 4 drives for multi-axis systems.

Key Product Differences

The model number follows STAC6 - <model variant> - <power supply voltage>. The four catalog configurations are:

• STAC6-S — High performance stepper drive complete with AC power supply.
• STAC6-Si — High performance stepper drive with Si Programmer.
• STAC6-S-220V — Stepper drive complete with 220 Vac power supply.
• STAC6-Si-220V — Stepper drive with 220 Vac power supply and Si Programmer.

Accessories include the MMI-01 operator interface, the HUB 444 SiNet Hub, the OMBOB-1 and OMBOB-2 breakout boxes, and configuration software with programming cables.