The Siemens LOGO! DM8 24R Expansion Module (6ED1055-1HB00-0BA2) is designed to expand the digital input and output capabilities of Siemens LOGO! 8 basic units in automation systems operating on 24 V AC or 24 V DC. This module provides a compact and robust solution for extending control functionality where relay-based switching and low-voltage signal processing are required.
The module features 4 digital inputs compatible with AC/DC/NPN signals, allowing flexible connection of sensors, pushbuttons, and field devices. It also includes 4 relay outputs capable of switching both resistive and inductive loads, making it suitable for direct control of lighting circuits, contactors, pumps, and industrial actuators.
With relay switching capacity of up to 5 A (resistive) and 3 A (inductive), the LOGO! DM8 24R ensures reliable operation in demanding automation environments. The module supports direct control logic from the LOGO! base unit and maintains stable performance across expanded control architectures.
The compact DIN-rail design (2 spacing units wide) enables efficient panel layout and straightforward integration into existing control cabinets. This makes the DM8 24R ideal for OEM automation panels and retrofitting existing LOGO! installations.
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 24R |
| Part Number | 6ED1055-1HB00-0BA2 |
| Product Type | Digital I/O Expansion Module |
| Mounting Type | 35 mm DIN rail, 2 spacing units wide |
| Supply Voltage (DC) | 24 V DC |
| Permissible Voltage Range (DC) | 20.4 – 28.8 V DC |
| Supply Voltage (AC) | 24 V AC |
| Line Frequency | 47 – 63 Hz |
| Digital Inputs | 4 DI (AC/DC/NPN) |
| Input Voltage “0” | < 5 V AC/DC |
| Input Voltage “1” | > 12 V AC/DC |
| Input Current (Signal 0) | Max. 1.1 mA |
| Input Current (Signal 1) | Typ. 2.63 mA |
| Input Delay (0 → 1) | Max. 1.5 ms |
| Input Delay (1 → 0) | Max. 15 ms |
| Digital Outputs | 4 DO (Relay) |
| Relay Output Current | 5 A (resistive), 3 A (inductive) |
| Minimum Load Current | 100 mA |
| Short-Circuit Protection | No |
| Switching Frequency (Resistive) | Max. 2 Hz |
| Switching Frequency (Inductive) | Max. 0.5 Hz |
| Mechanical Switching Frequency | Max. 10 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 |