Hydac EDS 300 Bedienungsanleitung PDF herunterladen (Seite 4)

5. Output function

5.1 Switching outputs

The EDS 300 has 1 or 2 switching outputs. The following settings can be made under the

basic setting:

5.1.1 Switching point setting (SP)

One switching point and one hysteresis can be set for each switching output. The respective

output switches when the pre-set switching point is reached and switches back when the

pressure falls below the switch-back point. The switch-back point is determined by the pre-

set hysteresis (switch-back point = switching point minus hysteresis).

Abbreviations: "S.P.1", "S.P.2" = switching point 1 or 2

"h.Y.1", "h.Y.2" = hysteresis 1 or 2

5.1.2 Window function setting (WIN)

The window function enables a range to be monitored. For each switching output, in each

case an upper and a lower switching value can be input which determine the range.

The respective output switches when the pressure enters this range. Upon leaving the

range, i.e. when the switch-back value has been reached, the output switches back. The

lower switch-back value is just below the lower switching value (lower switching value minus

three times the increment, see point 5.4). The upper switch-back value is just above the

upper switching value (upper switching value plus three times the increment, see point 5.4).

The area between switching and switch-back value forms a safety zone which prevents

unwanted switching operations from occurring (e.g. triggered by pulsations from a pump).

Example for switching output 1 (normally open function):

Abbreviations: "hi.1", "hi.2"= High level 1 or 2 = upper switching value 1 or 2

"Lo.1", "Lo.2"= Low level 1 or 2 = lower switching value 1 or 2

Note: The window function only operates correctly (switching on and off), when all switching

values (including the safety zone) are greater than 0 bar and lower than the nominal

pressure range.

5.2 Analogue output

On specified models, the EDS 300 provides one analogue output with a 4...20 mA signal.

5.3. Setting the Switching Points and Hystereses

Lo.1

hi.1 plus 3xincrement

Lo.1 minus 3xincrement

Safety zone

Off

Switch-back valuet

Switching value

Switch-back value

Switching value

hi.1

1 2 3 4 5 6 7 8 9 ... 13 14

Keine Kommentare

Hydac EDS 300 Bedienungsanleitung Seite 4