Grundfos CU 351 - Overview of Inputs and Outputs; Terminal Designations and Diagrams

English (GB)
13
10. Overview of inputs and outputs
DI: Digital input
DO: Digital output
AO: Analog output
AI: Analog input
NC: Normally closed contact
NO: Normally open contact
C: Common
Position numbers, see fig. 2.
Pos. Terminal Designation Data Diagram
1
L
Connection of phase
conductor
1 x 100-240 VAC ± 10 %, 50/60 Hz
N
Connection of neutral
conductor
PE
Connection to
protective earth
2
A1 RS-485 A
GENIbus (internal)
(Fix the screen with a cable clamp.)
Y1 RS-485 GND
B1 RS-485 B
Functional earth
3**
A RS-485 A
External GENIbus (not standard)
(Fix the screen with a cable clamp.)
Y RS-485 GND*
B RS-485 B
Functional earth
4
10 DI 1
Digital input
11 GND
12 DI 2
13 GND
14 DI 3
All terminals (except mains terminals) must only be connected to voltages
not exceeding 16 V
rms
and 22.6 V
peak
or 35 VDC.
5
Ethernet RJ45
External computing devices connected to the Ethernet connection must
comply with the standards IEC 60950 and UL 60950.
6 GENIbus Service connection
7
50 +24 V Supply to sensor. Maximum 30 mA
51 AI 1
Input for analog signal,
0/4-20 mA or 0-10 V
53 +24 V Supply to sensor. Maximum 30 mA
54 AI 2
Input for analog signal,
0/4-20 mA or 0-10 V
57 AI 3
58 GND
All terminals (except mains terminals) must only be connected to voltages
not exceeding 16 V
rms
and 22.6 V
peak
or 35 VDC.
L
N
CU 351
L
N
PE
A
Y
B
CU 351 IO 351
A1
Y1
B1
A
Y
B
CU 351
14
13
12
10
11
57
54
53
50
51
58
1
2
3