Input from Zone 0 (Zone 20), installation in Zone 2
Current Input signal: 4-20mA loop or 0/4-20mA externally powered
Voltage Input signal: ±12 V
Source/Sink Current Output signal: 0/4-20mA linear or reverse
Input and Output short circuit protection
Modbus RTU RS-485 Output
Out-of-range (burnout) fault detection
High Accuracy, μP controlled A/D converter
Three port isolation, Input / Output / Supply
EMC Compatibility to EN61000-6-2, EN61000-6-4, EN61326-1, EN61326-3-1 for safety systems
Fully programmable operating parameters
High Density: 1 channel, 2 trips with alarm relays
Optional alarm acknowledgement input
Simplified installation using standard DIN-Rail and plug-in terminal blocks, with or without power Bus, or customized Termination Boards.
The single channel Power Supply Repeater and Trip Amplifier D5254S provides a fully floating dc supply to energize conventional 2 wires 4-20mA transmitters located in Hazardous Area; it also accepts 0/4-20mA current input signals, as well as ±12 V voltage inputs (also suitable for 0/1-5 V and 0/2-10 V signals) from Hazardous Area. The module repeats/converts (in linear or square root scale) the input as on current signal, in a floating circuit to drive a Safe Area load, suitable for applications requiring SIL 2 (according to IEC 61511) in safety related systems for high risk industries.
The output signal can be in direct or reverse form. Two independent Alarm Trip Amplifiers are also provided. Each alarm energizes or de-energizes an SPDT relay for low, high, window or fault repeater alarm functions. The two alarm relays trip points are settable over the entire input signal range. An optional alarm acknowledgement input is also provided.