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H-System – Isolated Barriers and Termination Boards
Technical Specifications
7
Technical Specifications
7.1
Technical Data
Electrical Data
Power Supply to the Isolated Barriers
•
19 V DC to 30 V DC
Note
See corresponding datasheets for possible exceptions.
The voltage drop on the termination board via the decoupling diodes must be considered.
Each isolated barrier is internally protected. The termination boards have redundant
power supply connections with fuses that can be replaced by the customer.
Non-Hazardous Area Signals or Control Circuit Signals
•
0/4 mA to 20 mA signal level according to NE 43
•
0/2 V to 10 V signal level according to NE 43
•
0/1 V to 5 V signal level according to NE 43
•
Current output HART compatible
•
Current input HART compatible
•
Digital output: active or passive electronic output 100 mA/30 V, short-circuit protected
•
Relay output 2 A, minimum load 1 mA/24 V
•
Logic level 24 V according to IEC 60946
•
Functional isolation or safe isolation according to IEC 61140 and NAMUR NE 23
Hazardous Area Signals or Signals in the Field Circuit
•
Transmitter power supply up to 17 V DC
•
Current output HART compatible
•
Pt100, 2-, 3-, (4)-wire technology
•
Resistor 0 to 400 with freely definable characteristic
•
Potentiometer
•
Thermocouples of all types, internal cold junction, external reference
•
Current output HART compatible
•
Digital input according to NAMUR EN 60947-5-6
•
Digital output for standard Ex-i valves, short circuit-protected
Characteristic Safety Values
•
MTBF: Mean Time Between Failures
35
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