The Wurm DCC‑XP is a rack-mounted controller engineered for refrigerant systems. Offering integrated condensation pressure control, compressor capacity staging, fan management, and extensive monitoring, it’s ideal for commercial refrigeration and cold storage rack systems. Firmware versions range from V3 through V6, with V6 by 2019 offering advanced CAN bus features.

Key Features

Model: DCC‑XP (versions V3–V6)
Power Requirements: 230 VAC ±15%, ~5–4 VA
Control Outputs:
- Compressor Steps: Four staged capacity control (upgradable to eight via dual DCC‑XP)
- Relays: 4 × SPST, 230 VAC, rated 4 A (2 A resistive)
- Analog Output: 0–10 V output for fan speed or external controllers
Inputs & Sensors:
- Pressure Control: suction pressure sensor input (4–20 mA, –0.5…7 bar)
- Additional Inputs: fast-return, peak load shedding, multiple digital signals
Monitoring & Safety:
- Compressor run-hour counters, downtime detection, suction gas monitoring (via TRK277 sensor)
- Base-load shift, peak-load limiting, cyclical fan startup, temperature logging available
Communication:
- 3‑wire galvanically isolated CAN bus (C‑BUS) with service (CAN‑USB) socket
- Connects to Wurm network and FrigoData XP systems
Installation:
- DIN-rail mountable (35 mm / TH35)
- Housing: 106 × 90 × 58 mm, ~450 g
Environment:
- Ambient: 0…55 °C, storage: –25…70 °C
- EMC Compliant; CE, RoHS, EAC certified

Wurm – DCC-XP – Rack Control Module Integrated Condensation Pressure Control