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6.19.2 Analog Output
There are four different analog DC output configurations that can be selected:
•
0 - 20 mA
•
4 - 20 mA, which is the default configuration of an analog DC output
•
0 - 10 V
•
2 - 10 V
Example of 4- 20 mA output
An output current of 4 mA on the current output means a vibration speed of 0 mm/s, while 20 mA
on the output means max., 100 mm/s.
Each value between 0 mm/s and 100 mm/s is thus assigned directly linearly between 4 mA and 20
mA on the analog output.
Example 1: The specified vibration value is 60 mm/s. The following current must therefore be
present on the analog output:
I
out
= 4 mA +
Velocity
Full scale
∗ (16 mA) = 4 mA +
60
mm
s
100
mm
s
∗ (16 mA) = 13.6 mA
Example 2: The analog output shows a current of 15 mA. The speed is:
𝑉𝑒𝑙𝑜𝑐𝑖𝑡𝑦 = 𝐹𝑢𝑙𝑙 𝑠𝑐𝑎𝑙𝑒 +
𝐼
out
− 4 𝑚𝐴
16 𝑚𝐴
= 100
𝑚𝑚
𝑠
∗
15 𝑚𝐴 − 4𝑚𝐴
16 𝑚𝐴
= = 68.75
𝑚𝑚
𝑠
The resistance on the AC current output must not exceed 400
Ω.