5.6 Control types
(Identity code characteristic "Control type": 0)
The controlling pulse is internally generated and adjusted using the
stroke rate control knob (16).
(Identity code characteristic "Control type": 1, 4):
The controlling pulse is externally generated from potential-free or
semiconductor contacts and fed to the drive unit via the "external
control" jack. Examples are contact water meter or controls.
(Identity code characteristic "Control type": 2, 3, 5, 6):
An external, analogue signal is fed to the drive unit via the
"External control” jack, the stroke rate changes proportionally
according to the 0 .. 20 mA or 4 .. 20 mA signal.
(Identity code characteristic "Control type": 7, 8):
As for "Internal stroke rate setting” version, however there is also
the possibility of switching the metering on and off via an external
semiconductor contact or potential-free contact.
All control types, that can be controlled via an
input, can be supplied with an "External control"
input of a "non-intrinsically safe" [i, a] or "intrinsi‐
cally safe" type.
5.7 Button for maximum stroke rate
(Identity code characteristic "Control variant": 1):
A push-button is available as an option to allow the pump to run at
maximum stroke rate.
(Identity code characteristic "Control variant": 2):
A key switch is available as an option to allow the pump to run at
maximum stroke rate.
”Internal stroke rate setting”
“External contact control”
"Analogue control x - 20 mA"
“Internal stroke rate setting with pause
function”
Push-button for max. frequency
Key switch for max. frequency
Functional description
17
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