n
External (analogue, optional)
n
Manual (setting stroke rate in 10% increments)
5.2.4 Functional and Fault Indicators
The fault indicator lights up if the fluid level in the dosing tank falls
below the second switching point of the level switch (20 mm
residual filling level in the dosing tank).
The fault indicator lights up if the current falls below 3.8 mA (only
with 4...20 mA) or exceeds 23 mA in "External Analogue" operating
mode.
This LED flashes in the event of an undefined operating status.
The warning indicator lights up if the fluid level in the dosing tank
falls below the first switching point of the level switch.
The operating indicator lights up if the pump is ready for operation
and there are no fault or warning alerts. It goes out quickly as soon
as the pump has performed a stroke.
5.2.5 "External control" terminal
The "external control" terminal is a five-pole panel terminal.
It enables the following functions and operating modes to be used:
n
Pause
n
External contact
n
External Analogue (optional)
n
Auxiliary frequency (external frequency changer)
The two- and four-pole cables used to date can
continue to be used. The "Auxiliary frequency"
function can, however, only be used with a five-
pole cable.
5.2.6 "Level switch" terminal
A 2-stage level switch with pre-warning and end switch-off can be
connected.
Fault indicator (red)
Warning indicator (yellow)
Operating indicator (green)
Overview of Equipment and Control Elements
18
