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

6.3.5 Setting the analog inputs, terminals 53 and 54
The contacts A53 and A54 are positioned behind the control
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".
Note
Switch off the power supply before setting the
A54.
Remove the control panel to set the contact. See fig. 21.
Fig. 21 Setting contact A54 to current signal "I"
6.3.6 RS-485 GENIbus network connection
One or more CUE units can be connected to a control unit via
GENIbus. See the example in fig. 22.
Fig. 22 Example of an RS-485 GENIbus network
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).
10
A53 A54
U I
U I
Bus Ter = ON
Remove the control panel to set the contact. See fig. 23.
Fig. 23 Setting the termination contact to "ON"

6.4 Connecting the signal relays

As a precaution, signal cables must be separated
from other groups by reinforced insulation in
Caution
their entire lengths.
Fig. 24 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
BUS TER
OFF ON