About Limit Controllers | Temperature Control
Limiters and monitors provide control and safety cut-out capabilities to protect personnel, products, and machinery against high or low temperatures.
These devices are used in process control applications where independent limit switching for over or under temperature is required. They allow users to define upper or lower limits by entering setpoint values. If the pre-set temperature limit is exceeded, the output switches to ensure that the system is in a safe state. For example, the limit or monitor device can shut the system down or trigger forced cooling. Applications that often require limit and monitoring devices are ovens, furnaces, combustion plants, steam systems, and food heating equipment, to name a few.
Thermal process applications often require monitors and limiters to be type-tested to appropriate standards, such as EN14597-1, FM3454, and SIL2. West Control Solutions offers a comprehensive range of devices, from simple, cost-effective units to high-end solutions.
Description of West Control Solutions STB 55 Temperature Limit Controller
The STB55 safety temperature limiter is used as a behind-panel device when thermal processes must be monitored and the system must be transferred into a safe operational state in case of fault.
Benefits and Features of STB 55 Temperature Limit Controller
- Rail Mounted (100 x 50 mm), 110 mm depth
- Graphic LCD, with white LCD backlight
- Inputs RTD Pt100 or double-thermocouple
- 2 alarm outputs and retransmission output
- Useable as a Limiter and Exhaust gas Limiter
- Safety Limit alarm plus separate warning
- Memory function for error message
- Certified according to DIN EN 14597 SIL2
Specifications of STB 55 Temperature Limit Controller
| Product Category: | Limit Controller |
| Dimensions and size: | 100mm x 50mm x 110mm (HxWxD) |
| Connectors: | Spring terminals 0.14…2.5 mm² (AWG 26 .. 14) |
| Primary Input Type: | RTD Pt100 or double-thermocouple |
| Output Type: | Pt100, 3-wire, -100.0…+600.0 °C Thermocouple J (Fe-CuNi), -100.0…800.0 °C K (NiCr-Ni), -150…1200 °C N (NiCrSi-NiSi), -150…1200 °C S (Pt10Rh-Pt), 0…1600 °C |
| Max. Number of Outputs: | 3 |
| Control Type: | Safety temperature limiter |
| Power Supply: | 230 VAC 115 V AC 24 V AC 24 V DC |
| Certifications: | EN 14597, SIL2 |
Source: www.west-cs.co.uk
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