ISI202 | Bachmann | Dual-Channel Encoder Interface Module

Overview

The Bachmann ISI202 is a dual-channel encoder interface module designed for precise signal acquisition and reliable communication between encoders and automation controllers. It supports both incremental and SSI encoder types, offering flexible input options, multiple signal evaluation modes, and analog output capabilities for demanding motion and position control applications.

Key Features

• Model Number: ISI202

• Manufacturer: Bachmann Electronic GmbH

• Type: Encoder Interface Module

• Input Channels: Two independent channels supporting incremental or SSI encoders

• Output Channels: Two analog outputs (±10 VDC) for process feedback or motion control

• Digital Inputs: Two configurable channels for trigger or reference signals

• Signal Compatibility: A-, A+, B-, B+, N-, N+ differential inputs

• Signal Evaluation: 1-, 2-, or 4-edge counting; pulse and direction mode selectable

• Encoder Power Supply: Supplied directly via onboard connectors

• Voltage Monitoring: Real-time monitoring of all external supply voltages

Technical Specifications

• Maximum Input Frequency: 1 MHz or 5 MHz (depending on encoder type)

• Counter Resolution: 24-bit hardware, expandable to 32-bit in software

• Analog Output Range: ±10 VDC with precision voltage control

• Encoder Interface Types: Incremental or SSI encoders with differential line drivers

• Supply Voltage: 24 VDC nominal

• Weight: 0.99 lbs (approx. 450 g)

• Isolation: Electrical isolation between system and encoder interface for noise immunity

• Mounting: DIN-rail installation

Performance and Design

The ISI202 provides reliable encoder signal acquisition for high-speed and high-precision motion control systems. With a 24-bit counter (extendable to 32 bits) and multiple evaluation modes, it ensures accurate position and velocity feedback. The module’s built-in voltage monitoring and differential inputs enhance system stability and signal integrity, even in electrically noisy environments.

Applications

The ISI202 module is suitable for a variety of automation and motion control applications, including:

• Servo and stepper motor positioning systems

• Robotics and CNC control platforms

• High-speed conveyor feedback systems

• Process monitoring and synchronization in manufacturing lines

FAQ

Q1: What types of encoders are supported by the ISI202?
A1: It supports both incremental and SSI encoders through dual differential input channels.

Q2: What is the maximum counting frequency?
A2: The module supports up to 1 MHz for SSI and up to 5 MHz for incremental encoder inputs.

Q3: Does the ISI202 provide analog output?
A3: Yes, it includes two ±10 VDC analog outputs for control or feedback purposes.

Q4: What is the default counter resolution?
A4: The ISI202 features a 24-bit counter that can be extended to 32 bits through software.