JUMO – SafetyM STB/STW 701150/8-01-0253-2001-25/005,058 – Safety Temperature Lim

The JUMO SafetyM STB/STW (P/N 701150/8‑01‑0253‑2001‑25/005,058) is a high-safety temperature limiter and monitor module suitable for critical industrial processes. Featuring dual inputs (Pt100/4–20 mA), dual changeover relay outputs, and SIL 2/3 certification, it reliably safeguards systems from over-temperature events by switching to safe states under fault conditions.

Key Features & Specifications

• Model / P/N: 701150/8‑01‑0253‑2001‑25/005,058 (SafetyM STB/STW)  

• Safety Ratings: SIL 2/3 certified; meets PL e/SIL 3 standards

• Inputs: Programmed for 2 × Pt100 RTD or 2 × 4–20 mA loops  

• Outputs: 2 × changeover relay contacts (3 A, AC 250 V) with built-in 3.15 A fuse  

• Power Supply: 20–30 V AC/DC; 48–63 Hz  

• Enclosure & Mounting: 84 × 45 × 112 mm panel or DIN-rail mount; IP20 rated

• Alarm Functions: Pre-alarm and main limit with automatic/manual reset depending on STW/STB setup  

• Safety Function: Automatically switches outputs to safe state if input deviates, with SIL-rated diagnostics