Installation Instructions User guide

Bul. 937C Universal Frequency Converter Installation Instructions
Fault current
Setting Current path characteristic
0 mA ... 20 mA
Current path
characteristic
4 mA ... 20 mA,
acc. NAMUR NE 43
Characteristic
4 mA ... 20 mA
hold last measured value before fault occurred
Max
(upscale)
approx. 21.5 mA approx. 21.5 mA approx. 21.5 mA
(indistinguishable from overlimit of
final value)
Min
(downscale)
0 mA (indistinguishable from
underlimit of starting value)
2.0 mA 2.0 mA (indistinguishable from
overlimit of final value)
Start value and final value
During entry of start and final value, please note:
•
Values should be entered in the selected units.
•Values can be entered between 0.001 Hz and 5000 Hz (for non-Ex devices: 12 kHz). You can determine
the input limits
for a unit other than Hz by using the conversions that are given in Units.
•Since the Universal Frequency Converter converts all values into whole mHz (= 0.001 Hz), rounding
•
The difference between the final value and the start value should be greater then 1% of the end value.
errors may occur in values which you enter in rpm, r/sec, l/min, l/h, m/h, km/h or m/s. If your application
cannot tolerate this small variance in exceptional cases, please select the unit Hz.
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