Spirax Sarco VLM30 - Digital Output

IM-P736-02 EMM Issue 3
52
VLM30 In-Line Vortex Flowmeter
Fig. 33 Range of the external supply voltage and current
Digital output
Operating voltage 16 to 30 Vdc
Output current maximum 20 mA
External resistance R
B
1.5 kΩ ≤ R
B
≤ 80 kΩ
Output ‘closed’
0 V ≤ U
low
≤ 2 V
2 mA ≤I
low
≤ 20 mA
Output ‘open’
16 V ≤ U
high
≤ 30 V
0 mA ≤I
high
≤ 0.2 mA
Pulse output
f
max
: 10 kHz
Pulse width: 0.05 to 2000 ms
Frequency output f
max
: 10.5 kHz
Output functions (configurable)
Frequency output.
Pulse output.
Binary output (in/out, e.g. alarm signal).
35
30
28
21
16
14
7
0.2 2 10 20 22
R
Bmax
= 80 
R
Bmin
= 1.5 
4.3 Digital output
U (V)
I (mA)