Bachmann SDI208 Digital Input Module

Overview

The Bachmann SDI208 is a high-speed digital input module for the M1 automation system. It reliably detects and processes discrete signals from switches, sensors, and contact closures. The module features 8 individually isolated input channels with configurable filtering for precise signal acquisition. Designed for industrial environments, it ensures strong noise immunity and safe integration. The SDI208 supports flexible mounting and seamless communication with the M1 system bus. It is ideal for applications in energy, transportation, and manufacturing automation. The module can extend the SLC284 safety processor, creating a homogeneous and safe system. It integrates independently via direct slots, bus expansion, or FASTBUS connections. SDI208 complies with IEC 61508 safety standards, enabling safe application programming and visualization. Users can access all variables and states through PLC, C/C++, or other machine programming languages.

Technical Specifications

• Model Number: SDI208

• Module Type: Digital Input Module

• Input Channels: 8 digital inputs (expandable to 16 for redundant use)

• Input Voltage Range: 24 VDC nominal (15–30 VDC)

• Input Type: Sink/source compatible

• Isolation: Galvanic isolation per channel (500 VDC) and from system

• Input Current: Approx. 3 mA per channel

• Signal Filtering: Configurable debounce and noise suppression

• Status Indication: LED indicators for each input channel

• Diagnostics: Integrated fault detection and signal integrity checks

• Communication Interface: Integrated with Bachmann M1 system bus

• Mounting: DIN rail or modular rack installation

• Operating Temperature: –25°C to +60°C

• Humidity Tolerance: 5% to 95% RH (non-condensing)

• Dimensions: 98 mm × 110 mm × 35 mm

• Safety Features: Redundant 32-bit microcontrollers monitor inputs

• Compliance: PL e / SIL 3 / Cat 4

• Programming: Safe configuration via SolutionCenter with PLCopen function blocks

• Operating Status: "SAFE" indicator for the module and individual LEDs per channel