System 182-XT-4
Relay outputs
6 - 9
ba76027e02
12/2014
Pulse width output
The output via the pulse width is used, e.g. for controlling valves.
Pulse-width regulation changes the duration of operation (ton) of the
output signal. Depending on the position of the measured value in the
proportional range, the relay is operated for a longer or shorter period.
Fig. 6-4
Relay output of the pulse-width output
The cycle duration (T) is made up of the turn-on and turn-off switching
duration (t
on
, t
off
) of the relay together. While the selected cycle
duration (T) remains constant, the turn-on duration (t
on
) changes
depending on the measured value and, with it, the pulse width (v). The
pulse width can be set from 0 % to 100 %.
v = (t
on
/ T) * 100 %
v = pulse width, T = cycle duration, t
on
= turn-on duration
If the measured value is at the end of the proportional range (End
value), the turn-on duration (t
on
) is long, the turn-off duration is short.
This means the relay operates for a longer period.
If the measured value is at the beginning of the proportional range
(Start value), the turn-on duration (t
on
) is short, and the relay
operates for a correspondingly shorter period.
If the duration of the closing or opening pulse is shorter
than 0.1 s, the relay remains open or closed for the
complete cycle duration.
T
Time [s]
Relay
Off
On
t
On
t
Off
Summary of Contents for YSI 182-XT-4
Page 6: ...Contents System 182 XT 4 0 4 ba76027e02 12 2014...
Page 10: ...Overview System 182 XT 4 1 4 ba76027e02 12 2014...
Page 14: ...Safety System 182 XT 4 2 4 ba76027e02 12 2014...
Page 64: ...Installation System 182 XT 4 3 50 ba76027e02 12 2014...
Page 82: ...Operation System 182 XT 4 4 18 ba76027e02 12 2014...
Page 88: ...The SETTINGS menu System 182 XT 4 5 6 ba76027e02 12 2014...
Page 114: ...Relay outputs System 182 XT 4 6 26 ba76027e02 12 2014...
Page 116: ...Maintenance and cleaning System 182 XT 4 7 2 ba76027e02 12 2014...
Page 122: ...What to do if System 182 XT 4 8 6 ba76027e02 12 2014...
Page 134: ...Technical data System 182 XT 4 9 12 ba76027e02 12 2014...
Page 135: ...System 182 XT 4 1 ba76027e02 12 2014...
Page 138: ...Accessories and options System 182 XT 4 11 2 ba76027e02 12 2014...
Page 142: ...Appendix store separately if required System 182 XT 4 13 2 ba76027e02 12 2014...
Page 143: ......
