IFM DI521A is a compact speed-monitoring evaluation unit for rotational and linear movement monitoring. It uses inductive detection and provides a 10 mm sensing range. The unit has a PNP normally-open output and operates from 10–36 V DC. It has an M30 × 1.5 housing with a 92.3 mm length. The product is designed for applications such as underspeed and blocking detection.
Explore performance details, construction highlights, applications, and technical information in one clear overview.
The DI521A is designed for reliable speed supervision in industrial automation. Its compact construction enables installation close to the monitored target. The inductive sensing principle provides dependable detection of metallic machine components. The switching output can be integrated into PLC-based control systems. This makes it useful for machine protection and process monitoring.
The unit is designed to detect underspeed and blocking conditions. It can monitor rotational or linear movement depending on the application arrangement. The 10 mm sensing range provides practical target detection. Its PNP output supports direct integration with compatible control circuits. The device is suitable for continuous industrial monitoring.
The threaded M30 × 1.5 housing simplifies mechanical installation. Proper sensing distance and target alignment are important for reliable operation. The compact design allows integration into machinery without extensive additional hardware. It is suitable for conveyors, motors and rotating equipment. The device should be installed according to IFM technical instructions and application requirements.
Compact speed-monitoring design
Inductive sensing
10 mm sensing range
PNP electrical design
Normally-open output
10–36 V DC supply
M30 × 1.5 housing
92.3 mm length
Underspeed detection
Blocking detection
Rotational movement monitoring
Industrial automation integration
Motor monitoring
Conveyor systems
Rotating shafts
Linear movement monitoring
Machine protection
Drive monitoring
Production machinery
Material handling
Industrial automation
Equipment condition monitoring
| Parameter | Details |
|---|---|
| Model | DI521A |
| Product type | Compact evaluation unit |
| Sensing principle | Inductive |
| Application | Speed monitoring |
| Sensing range | 10 mm |
| Operating distance | 0–8.1 mm |
| Supply voltage | 10–36 V DC |
| Current consumption | <20 mA |
| Electrical design | PNP |
| Output function | Normally open |
| Output quantity | 1 |
| Voltage drop | Max. 2.5 V |
| Permanent output current | 250 mA |
| Short-time current | 250 mA |
| Short-circuit protection | Yes |
| Overload protection | Yes |
| Housing | Threaded |
| Thread | M30 × 1.5 |
| Length | 92.3 mm |
| Installation | Refer to datasheet |
| Target | Metallic |
| Monitoring | Underspeed / blocking |
| Connection | Refer to datasheet |
| Protection rating | Refer to datasheet |
| Temperature range | Refer to datasheet |
| Approval | Refer to datasheet |
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