The Siemens LOGO! DM8 230R Expansion Module (6ED1055-1FB00-0BA2) is designed to expand the digital input and output capabilities of Siemens LOGO! 8 basic units in applications that operate directly on 115 V or 230 V AC/DC. This module is particularly suitable for automation systems where mains-voltage I/O is required without the use of intermediate relays or power supplies.
The module features 4 digital inputs compatible with AC and DC signals and 4 relay outputs capable of switching high-voltage loads. The relay contacts support switching currents up to 5 A (resistive) and 3 A (inductive), allowing direct control of contactors, lighting circuits, and industrial actuators.
With its compact DIN-rail design, the LOGO! DM8 230R enables efficient panel layout and seamless expansion of existing LOGO! automation systems. The module supports direct control logic and can also be driven by digital signals from the LOGO! basic unit, ensuring synchronized operation across distributed control architectures.
As a trusted supplier of Siemens automation solutions,
Bardia Control Systems
supplies original Siemens LOGO! expansion modules with technical support and fast delivery across the UAE. Compatible controllers and accessories are available in our
Siemens Automation Technology
range.
For independent technical background on PLC-based automation systems and I/O expansion concepts, refer to the following industry article:
What Is a PLC and How Does It Work?
Technical Specifications
| Brand | Siemens |
| Product Family | LOGO! 8 Expansion Modules |
| Model | LOGO! DM8 230R |
| Part Number | 6ED1055-1FB00-0BA2 |
| Product Type | Digital I/O Expansion Module |
| Mounting Type | 35 mm DIN rail (2 spacing units wide) |
| Supply Voltage (AC) | 115 V / 230 V AC |
| Supply Voltage (DC) | 115 V / 230 V DC |
| Permissible Voltage Range (DC) | 100 – 253 V DC |
| Line Frequency | 47 – 63 Hz |
| Digital Inputs | 4 DI (AC/DC) |
| Input Voltage “0” | < 40 V AC / < 30 V DC |
| Input Voltage “1” | > 79 V AC / > 79 V DC |
| Input Delay (0 → 1) | Max. 40 ms |
| Input Delay (1 → 0) | Max. 75 ms |
| Digital Outputs | 4 DO (Relay) |
| Relay Output Current | 5 A (resistive), 3 A (inductive) |
| Short-Circuit Protection | No |
| Parallel Switching | No |
| Switching Frequency (Resistive) | Max. 2 Hz |
| Switching Frequency (Inductive) | Max. 0.5 Hz |
| Degree of Protection | IP20 |
| Operating Temperature | 0 °C to +55 °C (ES03+: -20 °C) |
| Dimensions (W × H × D) | 35.5 × 90 × 58 mm |
| Standards & Approvals | CE, CSA, UL, FM, Marine |
| Standards Compliance | IEC 61131, VDE 0631 |