Xylem WTW DIQ/S 281, Руководство по эксплуатации

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DIQ/S 281 Outputs
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ba77244d01 08/2020
Proportional outputs can be used in the following way:
 Output with one relay:
An output range is defined with a
Start value
and an
End value
. No output
takes place above and below the output range (see page 85).
 Output with two relays:
An output range is defined for each relay with a
Start value
and an
End value
.
One relay outputs in the upper output range and a further relay in the lower
output range (see page 85).
Output with one
relay
Output with two
relays
figure 6-3 Output with two relays
figure 6-2 Output with one relay
10
100
Proportional
band
Measured value
1
2
90
0
Switching frequency f or
Pulse
v width
1
Start value
Measured value with a minimum pulse width or switching frequency
2
End value
Measured value with a maximum pulse width or switching frequency
Proportional bands
Relay 1 and 2
Measured value
Relay 1
Relay 2
1
2
2
1
10
100
90
0
Switching frequency f or
Pulse
v width