Relay Outputs; Change Settings - Grundfos DDE series Montage- Und Betriebsanleitung

6.3.3 Relay outputs

Applies to DDE-PR control variant.
The pump can switch two external signals using installed relays. The relays are switched by potential-free
pulses. The connection diagram of the relays is shown in section
Relay 1 is allocated with the alarm signals (tank empty, motor blocked) as standard. Relay 2 can be allocated
with 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.

6.3.4 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 adjustment knob to 0 %.
2. Connect mains 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 color of the upper
status LED. The current setting is indicated by the color of the lower status LED.
4. Make the desired settings according to the following table:
upper status LED
setup mode description
Change setting
with [100%] key
* Only DDE-PR control variant
** Default setting
5. To exit setup mode, keep [100%] key and [Operation mode] key simultaneously pressed for at least
1 second.
18
Description
low level in tank
each full stroke
each incoming pulse from pulse input
4.3 Electrical connection).
Switch setup modes with [Operation mode]
key
Setup mode 1
Green
Contact type of signal
inputs (low-level,
empty and external
stop)
Green NO**
Yellow NC
Red -
4.3 Electrical connection.
Setup mode 2*
Yellow
Contact type of relay
outputs
NO**
NC
-
Setup mode 3*
Red
Allocated signal of
Relay 2
Low-level signal**
stroke signal
pulse input