STB 55 Safety Temperature Limiter

• SIL 2 and DIN EN 14597 certified for safety-critical applications

• Pt100 and thermocouple input options

• Safety relay with separate pre-alarm relay

• Optional analog output for monitoring or control

• Graphic LCD with plain-text fault indication

• Password protection and external reset input

The STB55 Safety Temperature Limiter provides reliable protection for industrial thermal systems. Certified to DIN EN 14597 and SIL 2, it monitors temperatures using Pt100 sensors or thermocouples and shuts down equipment immediately when unsafe conditions occur. The graphic display presents clear fault messages, while configurable relay and analog outputs support flexible system design and integration.

Outputs

• 2 Alarm Relays and 1 Analog Output (0/4..20mA, 0/2..10V)

• 1 Alarm Relay

Power Supply

• 230V AC, +/-10%, 50-60 Hz

• 24V DC, +/-15%

Product Type

• Series