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 4700+ Limit Controller – Temp Controller
The 4700+ limit controller is a member of the P series family. The instrument provides a latched relay output which is activated when process value either exceeds or falls below the a pre-set limit level, providing a fail-safe cut that has to then be reset before the process can continue. The LED indication shows when limits have been exceeded and when the relay is latched out.
With a full range of universal sensor input options, the 4700+ provides a valuable control ‘watchdog’ for most systems.
Benefits and Features of 4700+ Limit Controller – Temp Controller
- 5A Latching Limit Relay as standard
- Easy to use HMI
- Configuration via PC/Customisable operator menu
- Auto-hardware detect/set-up
- Modbus communications
- Jumperless configuration
- Process alarms
- Optional digital input and remote reset
- Optional 10V SSR driver output
- Backward-compatible panel cutout, housing and terminal wiring capability
- FM approval
Specifications of 4700+ Limit Controller – Temp Controller
| Product Category: | Limit controller |
| Dimensions and size: | 96mm x 96mm x 110mm (HxWxD), 1/4 DIN |
| Primary Input Type: | Universal (TC, RTD, DC linear mA/mV) |
| Other Inputs: | 1 digital |
| Output Type: | 1 Latching 5A Relay + 2 2A Relay, SSd, DC linear, Triac, 24V transmitter power supply |
| Max. Number of Outputs: | 3 |
| Control Type: | High/low limit, Alarm |
| Power Supply: | 100–240V AC 50–60Hz, 20-48V AC 50/60 Hz, 22-65V DC |
| Communications: | RS-485 serial (West ASCII or MODBUS®) |
| Certifications: | CE, UL, cUR, UR, FM, CSA |
| Software Tools: | Plus Series Configurator |
Source: www.west-cs.co.uk
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