Overview
The Siemens LOGO! DM8 230R 6ED1055-1FB00-0BA1 expansion module is designed to extend the I/O capabilities of LOGO! Basic controllers in industrial automation systems. This expansion module operates on 115/230 V AC/DC supply voltage with 4 digital inputs rated for 115/230 V AC/DC and 4 relay outputs rated for 5 A. The module uses isolated relay contacts, allowing you to switch heterogeneous loads—lamps, motors, contactor relays, and other devices—independent of the controller’s internal voltage levels.
Key Features
- 4 Digital Inputs: 4 digital inputs rated for 115/230 V AC/DC
- 4 Relay Outputs: Isolated contacts with 5 A switching capacity per output
- Universal Voltage Range: 115/230 V AC/DC supply voltage
- DIN Rail Mounting: Installation dimensions compliant with DIN 43880; snap-mounted to 35 mm DIN rails to EN 50022
- Reliable Expansion: Compatible with LOGO! Basic modules of equipment series 0BA3 and 0BA4
- No High-Speed Inputs: Expansion modules do not have high-speed inputs, suitable for standard control logic
Technical Specifications
- Supply Voltage: 115/230 V AC/DC
- Digital Inputs: 4 channels, 115/230 V AC/DC
- Digital Outputs: 4 relay outputs, 5 A rating
- Relay Contact Type: Isolated switching contacts
- Installation: DIN 43880 compliant; 35 mm DIN rail mounting per EN 50022
- Operating Temperature: -25 to +70 °C; -25 to +55 °C for cUL approval applications
- Environmental Conditions: Condensation permissible; suited for exceptional medial exposure (e.g., chlorine/sulfur atmosphere)
- Approvals: CE and cUL
- Equipment Series: 0BA1
- Manufacturer: Siemens
Typical Applications
- Machine and plant automation requiring expanded I/O capacity
- Control of motors, solenoids, and lighting via isolated relay outputs
- Integration with LOGO! Basic controllers in European and North American 115/230 V environments
- Process monitoring and equipment sequencing with additional input channels
- Retrofit and expansion of existing LOGO!-based automation systems
Compatibility & Replacements
Compatible With
- Siemens LOGO! Basic controllers (equipment series 0BA3 and 0BA4)
- LOGO! programming software (LOGO! Soft Comfort)
- DIN rail systems per EN 50022 / EN 60715
- Industrial control systems requiring 115/230 V relay switching
Replaces / Drop-In Replacement For
- Direct replacement for 6ED1055-1FB00-0BA1 units
- Verify controller and software version compatibility before ordering
Works With
- LOGO! Soft Comfort programming software
- LOGO! firmware versions compatible with 0BA1 equipment series
- Allied and Rexel authorized Siemens distributors
- Engineering integrators and maintenance technicians familiar with LOGO! platforms


















