Relay Outputs; Change Settings - Grundfos SMART Digital XL - DDE Series Installation And Operating Instructions Manual

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
the following signals:
Relay 2 signal
Low-level signal*
Stroke signal
Pulse input**
* Default setting
** The correct transmission of incoming pulses can only be guaranteed up to a pulse frequency of 5 Hz.
Continuous operation of the relays on a high frequency reduces the relay lifetime significantly.

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:
setup mode description
Change setting
with [100%] key:
* Default setting.
5. To exit setup mode, keep [100%] key and [Operation mode] key simultaneously pressed for at least 1
second.
Description
low level in tank
each full stroke
each incoming pulse from pulse input
5.3 Electrical
Switch setup modes with [Operation mode]
key:
Setup mode 1
LED status
Contact type of signal
inputs (low-level,
empty and external
stop)
NO*
NC
-
5.3 Electrical connection.
9. Faults) as standard. Relay 2 can be allocated with
connection.
Setup mode 2
Contact type of relay
outputs
NO*
NC
-
Setup mode 3
Allocated signal of
Relay 2
Low-level signal
Stroke signal
Pulse input
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