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Description
Application Scenarios
In a mid-sized packaging facility operating multiple S5-100U-controlled shrink-wrapping lines, the Siemens 6ES5422-8MA11 plays an essential role in monitoring conveyor presence sensors, safety interlock switches, and packaging material detectors. When intermittent sensor failures began causing unexpected line stoppages, the maintenance team traced the issue to aging input modules. Replacing the failing units with the 6ES5422-8MA11 restored signal integrity, reducing false trips and improving overall line availability.
The Siemens 6ES5422-8MA11 is primarily deployed in small to medium-scale automation systems across various industries, including automotive assembly, food and beverage processing, packaging machinery, and material handling. The suffix “8MA11” is particularly significant in real-world applications because it defines the input delay and maximum cable length—critical factors for proper signal acquisition . The 6ES5422-8MA11 is suitable for standard applications with unshielded cable lengths up to 100 meters . For applications requiring longer cable runs (up to 600 meters), the 8MA13 variant provides extended filtering and noise immunity, whereas high-speed applications such as counter gate signals require the fast-response 8MA11 variant .
Parameters
| Main Parameters | Value/Description |
|---|---|
| Product Model | 6ES5422-8MA11 |
| Manufacturer | Siemens AG |
| Product Category | SIMATIC S5 Digital Input Module |
| Series | SIMATIC S5, SM 300 Series |
| Input Points | 16 digital inputs |
| Input Voltage | 24V DC |
| Signal “0” Threshold | 0 to 5V |
| Signal “1” Threshold | 13 to 30V |
| Input Current (“1” signal) | 4.5 mA (typical) |
| Inherent Delay (0→1) | 4 ms (typical) |
| Inherent Delay (1→0) | 3 ms (typical) |
| Galvanic Isolation | None (non-isolated) |
| Cable Length (unshielded) | 100 m |
| Power Loss | 4.5 W (typical) |
| Weight | 190 g (6.7 oz.) |
| Compatible Systems | S5-90U, S5-95U, S5-100U, ET 100U, ET 200U |
| Product Status | Discontinued (legacy spare part) |
Key parameter notes: The 16-channel input configuration is ideal for applications requiring moderate input density. The absence of galvanic isolation makes this module suitable for clean environments where potential difference issues are minimal, offering a cost-effective alternative to isolated modules. The specified 100-meter cable length supports typical factory floor installations. The “8MA11” suffix is critical as it defines the cable length and input delay characteristics—the 8MA11 variant is optimized for standard cable lengths up to 50m with fast response, while 8MA12 and 8MA13 variants support longer cable runs with extended filtering .
