Connecting The Signal Relays - Grundfos CUE Series Installation And Operating Instructions Manual

Setting the analog inputs, terminals 53 and 54
Contacts A53 and A54 are positioned behind the operating panel
and used for setting the signal type of the two analog inputs.
The factory setting of the inputs is voltage signal "U".
If a 0/4-20 mA sensor is connected to terminal 54,
the input must be set to current signal "I".
Switch off the power supply before setting contact
A54.
Remove the operating panel to set the contact. See fig. 39.
Fig. 39 Setting contact A54 to current signal "I"
RS-485 GENIbus network connection
One or more CUE units can be connected to a control unit via
GENIbus.
The reference potential, GND, for RS-485 (Y) communication
must be connected to terminal 61.
If more than one CUE unit is connected to a GENIbus network,
the termination contact of the last CUE must be set to "ON"
(termination of the RS-485 port).
The factory setting of the termination contact is "OFF" (not
terminated).
Remove the operating panel to set the contact. See fig. 40.
Fig. 40 Setting the termination contact to "ON"

6.8 Connecting the signal relays

A53
A54
U I U I
6.8.1 Access to signal relays
The relay outputs are positioned as shown in figs
BUS TER
OFF ON
As a precaution, signal cables must be separated
from other groups by reinforced insulation in their
entire lengths.
Fig. 41 Terminals for signal relays in normal state (not
activated)
Terminal Function
C 1 C 2 Common
NO 1 NO 2 Normally open contact
NC 1 NC 2 Normally closed contact
Fig. 42 Terminals for relay connection, A2 and A3
Fig. 43 Terminals for relay connection, A4, A5, B1 and B2
42 to 47.
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