Battery Backup (Ups); Battery Data; Terminal Groups - Grundfos CU 3 Serie Instrucciones De Instalación Y Funcionamiento

9.11 Battery backup (UPS)

A battery can be connected to the CU 3X2 as backup
for the normal power supply. The battery can be
connected directly to the CU 3X2 without a fuse.
With the backup battery the CU 3X2 can continue to
operate despite interruptions in the normal power
supply.
Battery powered
12V dc
0V
Fig. 16 Label for backup battery

9.11.1 Battery data

The backup battery should meet the below
requirements:
Battery make Power Sonic
Battery type Lead acid battery AGM type
PS 12xxx series UL R/C under
Battery series
file number MH20845
Rated voltage 12 V
40 Ah, recommended
Battery capacity
(24 hours operating time)
Nominal charging
8 hours (40 Ah battery)
time
9.11.2 Battery monitoring
The CU 3X2 can monitor the following:
• short circuit
• wrong polarity
• defective battery
• battery missing
• low battery voltage.
12V

9.12 Terminal groups

10
8
7
6
5 4 3
Fig. 17 Terminal groups
The terminals of the groups 2, 3, 5 and 6 are
insulated from all other terminal groups by reinforced
insulation, 2224 VAC.
Group 1 Connection of power supply
Group 2 Internal GENIbus connection
Fieldbus connection
Group 3
(CIM module) (not standard)
Group 4 Connection of backup battery
Group 5 Digital inputs
Group 6 Ethernet connection
Group 7 Service connection (GENIbus)
Group 8 Analog inputs
Group 9 USB port
Group 10 Digital outputs
All control terminals in groups 2, 3, 5 and 6 are
supplied with SELV voltage (Safety Extra-Low
Voltage).
9
2 1
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