Indicator Lights; Terminals; Potentially Explosive Environments; Identification - Grundfos CU 351 Montage- Und Betriebsanleitung

1.2 Indicator lights

The CU 351 has one green and one red indicator
light, see also 7. Functions of indicator lights.

1.3 Terminals

10
70
71
72
8
73
74
75
50
51
53
54
7
57
58
6
5 10 11 12 13 14
11 4 3
Fig. 2 Back of CU 351
Pos. Description
1 Terminal for power supply
2 Internal GENIbus connection
External GENIbus connection
3
(not standard)
4 Terminals for digital inputs
5 Ethernet (RJ45)
6 Service connection
7 Terminals for analog inputs
8 Terminals for digital output relays
9 Cable clamps for GENIbus connections
10 Nameplate
11 Voltage indicator

1.4 Potentially explosive environments

The CU 351 must not be installed in explosive
environments, but may be used together with
Grundfos pumps approved for installation in
potentially explosive environments.
8
L N
B Y A A1 Y1 B1
9 2 1

2. Identification

The CU 351 can be identified by means of the
nameplate on the back, see fig. 3.
1 CU 351
Type
2 96161620 - VO1
Product No.
3
100-240 Vac 50/60Hz - max. 18W
U
N
!
Made in Thailand
Fig. 3 Nameplate
Pos. Description
1 Type designation
2 Product number
3 Rated voltage, frequency and power
4 Production code (year, week)
5 Serial number

2.1 Type key

Code Example
CU Control unit
35 Controller series
1 Model number

3. Installation

The CU 351 is only intended for factory wiring.
Before installation check that the CU 351
• corresponds to the one ordered.
• is suitable for the supply voltage and frequency
on the installation site.
• has not been damaged during transportation.
Warning
Switch off the power supply prior to
installation. It must be ensured that it
cannot be accidentally switched on.
The installation must be carried out by authorised
personnel in accordance with local regulations.
All safety regulations must be observed on the
installation site.
Warning
The terminals L and N as well as 70 to
75 may be connected to dangerous
contact voltage. External control
voltage from other groups may occur.
Warning
All wires to units outside the control
panel must be of the type H05VV-F
according to CENELEC HD21 (to avoid
injury from touching wires).
5
Serial No.
P .c. 4
OPEN TYPE PROCESS
CONTROL EQUIPMENT
2KDO
CU 3 5 1