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Description
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | 6ES5430-8MD11 |
| Manufacturer | Siemens |
| Product Type | Digital Input Module |
| Series | SIMATIC S5 430 |
| Compatible Controllers | S5-90U, S5-95U, S5-100U, ET100U, ET200U |
| Number of Inputs | 4 (floating) |
| Galvanic Isolation | Yes, via optocoupler (grouped in 4s) |
| Input Voltage (Rated) | 230 V AC/DC |
| Input Voltage “0” Signal | 0 to 70 V |
| Input Voltage “1” Signal | 170 to 264 V (AC) |
| Input Frequency | 47 to 63 Hz |
| Input Current at “1” (AC) | 16 mA typical at 230 V AC |
| Input Current at “1” (DC) | 2.5 mA typical at 230 V DC |
| Inherent Delay “0→1” | 10 ms typical |
| Inherent Delay “1→0” | 20 ms typical |
| Cable Length (unshielded) | 100 m max |
| Rated Insulation Voltage | 250 V AC |
| Insulation Group | 2 × B |
| Test Voltage | 1500 V AC |
| Residual Current (2-wire BERO) | 5 mA max |
| Current Consumption (+9V) | 16 mA typical |
| Power Loss | 2.5 W typical |
| Operating Temperature | -25°C to +60°C |
| Protection Class | IP20 |
| Weight | Approx. 210 g |
| Certifications | CE, UL |
Main Features and Advantages
Floating Input Design for Flexible Grounding: The Siemens 6ES5430-8MD11 features a floating input configuration that allows the module to accommodate both grounded and ungrounded field device installations. This floating design provides installation flexibility and enhances system reliability by enabling proper grounding practices for each application, reducing the risk of ground loops and signal errors commonly encountered in complex industrial installations.
Galvanic Isolation for Signal Integrity: Each input channel of the 6ES5430-8MD11 is protected by optocoupler-based galvanic isolation, with all four channels grouped for common isolation. This isolation provides effective separation between the PLC’s internal logic circuits and the field-side signals, preventing electrical noise, transient voltages, and ground potential differences from affecting the control system’s operation. The robust isolation rating of 1500 V AC test voltage ensures reliable performance in electrically noisy industrial environments.
Wide Input Voltage Range: The Siemens 6ES5430-8MD11 accepts both AC and DC input signals across a wide voltage range, with a rated value of 230 V AC/DC. The module reliably detects “1” signals from 170 V to 264 V (AC) and interprets “0” signals from 0 to 70 V. This versatility allows direct connection to diverse field devices, including limit switches, proximity sensors, push buttons, and selector switches, without requiring external signal conditioning.
Optimized Input Delay for Noise Immunity: The 6ES5430-8MD11 incorporates carefully designed input delays of approximately 10 ms for signal rise and 20 ms for signal fall. These delays effectively suppress transient disturbances and contact bounce, ensuring stable signal detection and reducing false triggering. The inherent delay characteristic contributes to system reliability by preventing spurious signals from affecting critical control logic.
Compact Design and Low Power Consumption: With a typical power loss of only 2.5 W and weight of approximately 210 g, the Siemens 6ES5430-8MD11 is an energy-efficient and lightweight module. Its compact 6U form factor allows dense mounting in control cabinets, optimizing space utilization while minimizing thermal management requirements. The IP20 protection rating provides adequate protection for installation within standard industrial enclosures.
Broad System Compatibility: The 6ES5430-8MD11 supports integration with multiple Siemens platforms, including S5-90U, S5-95U, S5-100U controllers, and ET100U/ET200U distributed I/O systems. This broad compatibility ensures seamless integration into existing S5-based automation architectures and simplifies system expansion or modernization projects.
