The JUMO SafetyM STB/STW (P/N 701150/8‑01‑0253‑2001‑23/005) is a certified safety temperature limiter (STB) and monitor (STW). Featuring dual universal inputs, dual relay outputs, and SIL 2/3 capability, it ensures early detection of over-/under-temperature conditions and takes the system to a safe state. Its two-channel 1oo2D architecture complies with DIN EN 14597, EN 61508, and EN ISO 13849-1 standards.

Key Features & Technical Specifications

Model / P/N: 701150/8‑01‑0253‑2001‑23/005 – SafetyM STB/STW
Safety Standards: SIL 2/3 (IEC 61508), PL e (ISO 13849-1), DIN EN 14597 1oo2D structure
Inputs: 2 universal: Pt100, thermocouple, 0/4–20 mA, 0–60 mV
Outputs: 2 x SPDT relay (Pre‑Alarm, Alarm), changeover contacts, each 3 A @ 250 V AC; integrated fuse
Supply Voltage: 110–240 VAC ±10% (48–63 Hz) or 20–30 V AC/DC
Display/Controls: Illuminated LCD, 4-button navigation, manual RESET for STB, auto-reset option for STW
Dimensions: 85 × 45 × 110 mm, panel or 35 mm DIN-rail mounting, IP20, –20 … +55 °C
ATEX/Ex Certified (Extra Code .058): Intrinsically safe input for explosion-risk environments

JUMO – SafetyM STB/STW 701150/8-01-0253-2001-23/005 – Dual-Channel Safety Temp