XBC/XEC-DP20SU

Description

SU-class compact XGB CPU in the ~20-point class (typical split ≈12 DI / 8 DO), higher performance than E-class with SU feature set: PID, HSC, positioning and better memory/scan.

The Polar Energy Assessment:

DP20SU is the SU (standard) tier XBC/XEC main unit for mid-complexity panels. Compared with E models it brings much more program memory (~15k steps), a far faster execution rate (SU class ≈94 ns/step), and built-in functions like PID loops, high-speed counters and positioning. It supports the usual XGB expansion topology (multiple expansion stages and option slots) so you can scale local I/O without jumping to a rack PLC. Use DP20SU when you need compact hardware but real control features and headroom.

Pros

• SU performance and memory (real PID/HSC capability in a compact unit).
• Good expansion headroom for a compact CPU (per XGB expansion rules).
• Robust comms: RS-232C / RS-485 channels and USB/loader support on many SKUs.

Limitations

• More expensive than E-class; overkill for trivial sequencing only.
• Confirm DI/DO polarity and power variant on the SKU to avoid wiring mismatches.

Typical use cases

• Medium-complexity AHU/chiller zones with PID loops, packaging machines with pulse counting, conveyor segments needing reliable HSC and limited positioning.