ACR222/2 | Bachmann | 2-Axis Stepper Motor Controller Module

Overview

The Bachmann ACR222/2 is a precision dual-axis motion control module engineered for stepper motor applications. It offers high-speed operation, flexible configuration, and smooth acceleration control. Designed for demanding automation environments, it provides reliable positioning performance, galvanic isolation, and advanced signal processing for both motor and encoder interfaces.

Key Features

• Model Number: ACR222/2

• Manufacturer: Bachmann Electronic GmbH

• Type: Two-Axis Stepper Motor Controller Module

• Function: Controls two independent stepper motor output stages with programmable motion profiles

• Operation: High-speed control with selectable acceleration types

• Configuration: Flexible setup for multi-axis synchronization and feedback integration

• Protection: Galvanic isolation and reverse polarity protection for enhanced reliability

Encoder Interface

• Counter Resolution: 24-bit precision

• Counter Modes: 1-, 2-, and 4-edge evaluation

• Maximum Encoder Frequency: 1 MHz

• Input Compatibility: HEDL (HP/Avago interface) / RS422 differential inputs

• Encoder Supply Voltage: Selectable +5 V or +15 V via jumper

• Isolation from System: 500 V DC

Motor Control Interface

• Stepper Frequency: Up to 150 kHz

• Step Range: 1 to 16,777,215 steps

• Acceleration Profiles: Linear, parabolic, or sin²

• Acceleration/Braking Time: Adjustable between 8 ms and 131 s

• Output Voltage Levels: Low: 0–2 V, High: 3–34 V (Imax = 10 mA)

• Input Voltage Levels: Low: 0–3 V, High: 4–30 V

• Supply Voltage: 18–34 V DC nominal

• Current Consumption: 400 mA typical at 24 V DC + encoder/sensor load

• System Isolation: 500 V DC

• Reverse Polarity Protection: Included

Environmental Specifications

• Operating Temperature: 0°C to +60°C

• Storage Temperature: -40°C to +85°C

• Operating Humidity: 5%–95%, non-condensing

• Storage Humidity: 5%–95%, non-condensing

• Pollution Degree: 2 (according to IEC 60664-1)

• Cooling Method: Natural convection

Physical Characteristics

• Dimensions: 2.5 × 4.7 × 2.5 in (6.3 × 11.9 × 6.3 cm)

• Weight: 0.3 kg (0.66 lbs)

• Mounting Type: DIN rail

Performance and Design

The ACR222/2 provides precise and stable motion control for dual-axis stepper systems. Its configurable acceleration curves allow optimized motion profiles for both rapid positioning and smooth operation. With integrated galvanic isolation and high-speed encoder input, it ensures accurate control and feedback even in noisy industrial conditions.

Applications

The ACR222/2 module is ideal for:

• Robotics and CNC machine control

• Conveyor and packaging systems

• Pick-and-place and assembly equipment

• Precision positioning systems

• Motion control in automated test setups

FAQ

Q1: What motor types are supported by the ACR222/2?
A1: It is designed for two independent stepper motor output stages.

Q2: Can encoder feedback be connected directly?
A2: Yes, it supports HEDL and RS422 encoder inputs up to 1 MHz.

Q3: What protection features are integrated?
A3: The module provides galvanic isolation and reverse polarity protection.

Q4: How can acceleration and braking be configured?
A4: Acceleration can be defined as linear, parabolic, or sin² using software configuration.