ISI222/8 | Bachmann | Dual-Channel Positioning Module

Overview

The Bachmann ISI222/8 is a high-precision positioning module engineered for advanced motion control systems. It combines two incremental encoder interfaces, dual analog outputs, and high-speed digital inputs to deliver precise synchronization and motion feedback for industrial automation. Its robust architecture and galvanic isolation ensure stable operation in demanding environments.

Key Features

• Model Number: ISI222/8

• Manufacturer: Bachmann Electronic GmbH

• Type: Dual-Channel Positioning and Motion Control Module

• Encoder Interfaces: Two independent incremental encoder channels with 32-bit resolution

• Analog Outputs: Two ±10 V outputs with 14-bit precision for speed or torque control

• Digital Inputs: Four high-speed inputs (two TRIG, two INIT) for event-based triggering

• Synchronization: Integrated SYNC and PreSYNC signals for multi-axis coordination

• Signal Isolation: 500 V galvanic isolation between system and field interfaces

Technical Specifications

• Input Frequency: Up to 8 MHz per encoder channel

• Encoder Power Supply: Selectable +5 V, +15 V, or +24 V

• Analog Output Range: ±10 V

• Analog Accuracy: ±0.025% of full scale

• Digital Input Voltage: 18–34 V DC

• Input Type: Optically isolated high-speed digital channels

• Synchronization Modes: Hardware-based synchronization using SYNC/PreSYNC signals

• Operating Temperature: -30°C to +60°C

• Storage Temperature: -40°C to +85°C

• Power Supply: 24 V DC nominal

• Isolation Voltage: 500 V DC

• Mounting Style: DIN rail

Performance and Design

The ISI222/8 offers precise motion synchronization across multiple control axes. Its 32-bit encoder counters enable sub-micrometer resolution, while the analog and digital I/O interfaces support both real-time feedback and fast event triggering. The module’s hardware-based synchronization minimizes jitter and ensures deterministic control for servo or stepper motor systems.

Applications

The ISI222/8 module is ideal for use in:

• CNC and robotic positioning systems

• Packaging and pick-and-place machinery

• Motion-controlled test benches

• Automated inspection and metrology systems

• Servo and stepper drive feedback loops

FAQ

Q1: What type of encoders can the ISI222/8 interface with?
A1: It supports incremental encoders with differential RS422 or TTL outputs.

Q2: Does the module provide isolated analog outputs?
A2: Yes, both analog outputs are galvanically isolated and deliver ±10 V with 14-bit accuracy.

Q3: How is motion synchronization achieved?
A3: The ISI222/8 uses SYNC and PreSYNC signals for real-time axis synchronization.

Q4: What is the maximum encoder frequency supported?
A4: Each encoder input supports frequencies up to 8 MHz for high-speed applications.