Control Via An External Analogue Signal 0 -10 V; External Desmodronic Control - Biral A 802 Instructions D'installation Et D'entretien

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MIN characteristic curve
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8.3 Control via an external analogue signal 0 –10 V
The pump is equipped with an input for connecting an external
analogue signal generator 0 –10 VDC (terminals 5 and 6).
The pump can be regulated by an external control using this input.
The pump characteristics can be adjusted in the range between
the MIN characteristic and the appropriately set feed height,
(pos. 2) via the external analogue signal.
Pos. Description
1 Maximum delivery head/constant characteristic curve
2 Selected delivery head/constant characteristic curve
Connection and adjustment
1. Clamps 3 and 4 must not be bridged
2. Set the feed height with
3. Interrupt voltage supply
4. Now bridge clamps 3 and 4
5. Attach 0–10 V to clamps 5 and 6
The input for the MIN characteristic curve
Note
(terminals 3 and 4) must be short-circuited
8.4 External forced control
The pump is equipped with inputs for external signals governing

external desmodronic control:

– Pump ON/OFF (terminals 1 and 2)
– Operation at the MIN characteristic curve (terminals 3 and 4).
During forced control, the illuminated fields
or message lights show the function currently active.
Function diagram: Input for external ON/OFF
Function diagram: Input for MIN characteristic curve
The input for the MIN characteristic curve is only active
when the input for ON/OFF is short-circuited.
,
ON/OFF
Normal operation
Stop
MIN characteristic curve
Normal operation
MIN characteristic curve
(Nighttime drawdowns)