Alarm Relay Output; Communication Between Ciu Unit And Pumps - Grundfos IO Instrucciones De Instalación Y Funcionamiento

5.1 Alarm relay output

The alarm relay of the IO module has two functions.
It can be used either as a normally open (NO) relay
or as a normally closed (NC) relay.
The alarm relay output is activated by any alarm in
the system. If the alarm disappears, the alarm relay
is automatically reset.
The alarm relay can also be activated by one of
these inputs:
• input for high water level (NO/NC).
– See section 5.4 High water level.
• input for external alarm (NO/NC).
– See section 5.5 General-purpose alarm.
Note
Maximum contact load: 230 VAC, 2 A.
The alarm relay can be manually reset via the relay
reset input. See section 5.3 Resetting of external
alarm.
For connections, see fig. 5 and section 5. IO module.
NO C NC
Alarm relay output
Fig. 5
Pos. Description
Use this terminal when the relay is to be
NO
used as a normally open relay.
C Common terminal.
Use this terminal when the relay is to be
NC
used as a normally closed relay.

5.2 Communication between CIU unit and pumps

The IO module communicates with each pump via
powerline communication. Each pump in the pit has
a unique internal number (GENIbus number).
This GENIbus number is set automatically by the
controller built into the Grundfos pumps.
See section 4. Installation.
5.2.1 Connecting the communication leads
1 2
Communication
Fig. 6
14
Terminals 1 and 2 are used to establish
communication with each pump. If more than one
pump are installed in the system, the leads are to be
connected as shown in fig. 7.
Example
Leads 4 and 6 from each power supply cable must
be connected in the lower part of the terminal block,
or similar, used for communication. The terminal
block is not supplied with the product.
In the upper part of the terminal block, a parallel
connection is to be made. Then connect lead 4 to
terminal (pos. 1) and lead 6 to terminal (pos. 2).
See fig. 7.
IO module
4 6
4 6 4 6 4 6 4 6
Powerline connection
Fig. 7
CIU
DIN rail
6
4