Certified stop SIL 2, DIN EN 14597 (interchangeable for DIN 3440). Intended for safety systems in thermal processes requiring certification, e.g. boilers, reactors.
It can be used as: temperature safety limiter (STB) - after exceeding min / max, a manual reset must be carried out, temperature limiter (ASTB) - operation as above, monitoring (STW) - outputs on / off, depending on the process value.
Basic technical data of STB55:
- EN 61508 SIL 2 certification
- programming limits and hysteresis
- Pt 100 input 3-wire or double J, K, N and S thermocouple
- error 0.5%, ± 2 digits
- reaction time 0.5s
- 4 programming buttons
- password
- 1 SPDT relay - alarm output
- memory
- top-hat DIN
- display
Safety sensors cooperating with STB 55: Sensor SIL