Description
SU-class compact CPU in the ~30-point class (typical ≈18 DI / 12 DO), SU performance (PID, HSC, positioning) in a compact form.
The Polar Energy Assessment:
DP30SU sits in the sweet spot: roughly the same I/O count as DP30E but with SU performance and features. Expect ~15k steps memory, ≈94 ns/step processing, full PID, robust HSC channels and positioning support. This unit is for machines that need professional control features without the price of H-class hardware. Verify exact DI/DO split and polarity when ordering.
Pros
- SU feature set and speed for moderately complex machines.
- Good expansion options and comms for distributed systems.
- Simple to commission with standard LS tooling.
Limitations
- Tend to be more expensive than E models; only worth it if you need PID/HSC/positioning.
Typical use cases
- Packaging lines with counters and PID loops, AHU zones needing reliable PID, and machines needing modest positioning capability.


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