Grundfos DDE User Manual

English (GB)
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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 4.3 Electrical connection.
Relay 1 is allocated with the alarm signals (tank empty, motor blocked) 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.
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 4.3 Electrical connection).
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:
* 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.
Relay 2 signal Description
Low-level signal * low level in tank
Stroke signal each full stroke
Pulse input ** each incoming pulse from pulse input
Switch setup modes with [Operation mode]
key
Setup mode 1 Setup mode 2 * Setup mode 3 *
upper status LED Green Yellow Red
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
lower status LED
Green NO ** NO ** Low-level signal **
Yellow NC NC stroke signal
Red – – pulse input

Grundfos DDE Specifications

General

Pump Type	Diaphragm Dosing Pump
Protection Class	IP65
Control Type	Manual
Power Supply	230 V, 50/60 Hz
Material	PVDF, PTFE, Ceramic
Operating Temperature	0 - 40 °C
Approvals	CE
Ambient Temperature	0 - 40 °C
Dosing Accuracy	< +/- 1 %