English (GB)
21
7.3.3 Relay outputs
Applies to DDE-AR control variant.
The pump can switch two external signals using internal relays. The relay outputs are potential-free. The
connection diagram of the relays is shown in section
.
Relay 1 is allocated with the alarm signals (see section
) as standard. Relay 2 can be allocated with
the following signals:
* Default
setting
** The correct transmission of incoming pulses can only be guaranteed up to a pulse frequency of 5 Hz.
7.3.4 Change settings
The signal inputs (level signals, external stop) and the relay outputs are configured at the factory as normally
open (NO) contacts. They can be re-configured as normally closed (NC) contacts. Relay 2 can be allocated
with different signals.
The activated settings are indicated by the status LEDs when the pump is in the setup mode. For entering the
setup mode and changing settings, proceed as follows:
1. Set adjusting knob to 0 %.
2. Connect power supply. See section
.
3. Press [100%] key and [Operation mode] key simultaneously and hold them down for at least 5 seconds.
– The pump switches into setup mode 1. The active setup mode is indicated by the operation mode LEDs.
The current setting is indicated by the status LEDs.
4. Make the desired settings according to the following table:
*
Default setting.
5. To exit setup mode, keep [100%] key and [Operation mode] key simultaneously pressed for at least 1
second.
Relay 2 signal
Description
Low-level signal*
low level in tank
Stroke signal
each full stroke
Pulse input**
each incoming pulse from pulse input
Continuous operation of the relays on a high frequency reduces the relay lifetime significantly.
Switch setup modes with [Operation mode]
key:
Setup mode 1
Setup mode 2
Setup mode 3
LED status
setup mode description
Contact type of signal
inputs (low-level,
empty and external
stop)
Contact type of relay
outputs
Allocated signal of
Relay 2
Change setting
with [100%] key:
L
E
D st
atus
NO*
NO*
Low-level signal
NC
NC
Stroke signal
-
-
Pulse input
