Limiters and monitors provide control and safety cut-out capabilities to protect personnel, products, and machinery against high or low temperatures.
About Limit Controllers | Temperature Control
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.
Descriptions of TB 45 Temperature Limit Controller
The TB 45 temperature limiter is intended for precise, cost-effective signal monitoring & limiting tasks. The TB 45 can be used for heating and refrigeration processes. It is suitable for all thermocouple types and resistance-type sensors.
Applications of TB 45 Temperature Limit Controller
- All applications where an over or under-temperature fault condition could present a fire hazard or another hazard
- Heating system in buildings to DIN EN 12828
- Large hot-water boilers to DIN EN 12953-6
- Thermal transfer plants with organic heat transfer media to DIN 4754
- Oil-fired installations to DIN 4755
- Limit signaling function for any type of input signal
Benefits and Features of TB 45 Temperature Controller
- Compact solution for distributed automation
- Display and operating functions
- 2 universal inputs for TC, RTD, R, U, I, O2
- Universal output, relays/optocoupler outputs
- Front interface and BlueControl®-software
- RS 485 interface
- The compact design, only 22.5 mm (0.87”) wide – saves space in the control cabinet
- Clips onto top-hat DIN rail
- Plug-in screw terminals or spring-clamp connectors – simple connection
- Dual-line LC display with additional display elements – process values always in view
- Convenient 3-key operation
- Direct communication between mounted controllers, fieldbus connections via bus coupler – simple integration into PLC / PC
- Universal input- also reduces stock-keeping
- Second analog input as universal input (optional)
- Universal high-resolution output as combined voltage/current output
- Two output relays or optocoupler outputs
- Fast 100 ms response – also suitable for fast signals
Specifications of TB 45 Temperature Controller
| Product Category: | Limit Controller |
| Dimensions and size: | 99mm x 22.5mm x 118mm (HxWxD) |
| Connectors: | Screw terminals or spring loaded terminals |
| Primary Input Type: | Universal (TC, RTD, DC linear mA/mV) |
| Other Inputs: | 2nd universal input |
| Output Type: | Relay, Linear mA/V DC |
| Max. Number of Outputs: | 3 |
| Scan Time: | 100 ms |
| Control Type: | Temperature limiter |
| Power Supply: | Trans100–240VAC, 18-30V AC/DC |
| Communications: | Modbus RTU, Via adapter (ETH-MODBUS TCP, PROFIBUS, CAN-open) |
| Other Functions: | Max.-, Min.-, Mean value |
| Certifications: | CE, Type tested to EN 14597 (replaces DIN 3440), cULus |
| Software Tools: | BlueControl |
Source: www.west-cs.co.uk
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