Description of the signal inputs and outputs
33
Fault signal output
“Alarm”
The “Alarm” output is an isolated relay changeover contact. During
fault-free operation, the contact between the terminals NO - C is
closed and opened between NC - C. In the event of a fault or voltage
failure, the contact between the terminals NO - C is opened and
closed between NC - C.
Current output 4-20 mA
The current output supplies the measurement value to the current in-
put of the connected master controller.
Loading the current loop
The maximum load of 500 Ohm must not be exceeded!
In the event of faults and very long lines (around 20 m), the use of a
shielded cable is recommended.
Calculation of output currents
How is the current calculated for a specified measurement value?
measurement value
current =
x 16 mA + 4 mA
measurement range upper limit
For a specific calculation see section
on
page 11.
Function
4-20 mA
NOTE
