Applications for Combined Loop Power and Safety Barrier with IEC
Suitable for use in hazardous areas the SIL2 rated barrier provides:
- Galvanic isolation of 4 to 20 mA current circuits
- Removing large loop circuits
- Powering 2 wire transmitters
- Monitoring of SMART transmitters with early-warning system
- Intrinsically safe sensor supply for Ex-area8
Features of Combined Loop Power and Safety Barrier with IEC
- Can be powered by 20-250V ac/dc, reducing the need for different versions across the plant
- Front-mounted HART communication sockets makes it simple to obtain information or reprogram the instrument without removing it or disconnecting the wires
- Using a conveniently positioned DIP switch, HART diagnosis can be selected. This option provides these possibilities:
- Monitoring the 4-20mA signal for compliance with NAMUR NE43
- Evaluation of the HART status byte to alarm when the connected device is in error mode
- Checking the E+H – specific diagnostic command for early warning of changed process conditions with E+H devices.
- Simple Installation due to the devices small form factor featuring a 22.5 mm (Preline) width and compact DIN rail mount
In many process plants, the potential for fire or explosion exists because of gases, dust, or easily ignitable fibres or filings in the vessel or area that is being monitored. The RN221N is offered with an IEC Ex ia rating which indicates that its electrical energy is restricted to a level below that which can cause ignition by either sparking or heating effects, making it ideal for use in hazardous areas.