Overview Of Inputs And Outputs - Grundfos CU 3 Serie Instrucciones De Instalación Y Funcionamiento

10. Overview of inputs and outputs

DI: Digital input
DO: Digital output
AI: Analog input
NC: Normally closed contact
NO: Normally open contact
C: Common.
Position numbers, see fig. 17.
Group Terminal Designation
Connection to phase
L
conductor
Connection to neutral
1 N
conductor
Connection to
PE
protective earth
A1 RS-485 A
Y1 RS-485 GND
2 B1 RS-485 B
Functional earth
3 Connection to external fieldbus, see installation and operating instructions for the CIM module.
0 V
4 Connection to battery
+12 VDC
10 DI1
11 GND
12 DI2
13 GND
5
14 DI3
All terminals (except mains terminals) must only be connected to
voltages not exceeding 16 V
Ethernet RJ45
6
External computing devices connected to the Ethernet connection must
comply with the standards IEC 60950 and UL 60950.
7 GENIbus
47 +24 V
50 +24 V
51 AI1
8
53 +24 V
54 AI2
57 AI3
58 GND*
All terminals (except mains terminals) must only be connected to
voltages not exceeding 16 V
14
Data
1 x 100-240 VAC ± 10 %, 50/60 Hz
GENIbus
(Fix the screen with a cable clamp.)
Backup battery
Digital input
and 22.6 V or 35 VDC.
rms peak
Service connection
Supply to sensor.
Short-circuit-protected 30 mA
Supply to sensor.
Short-circuit-protected 30 mA
Input for analog signal,
0-20/4-20 mA or 0-10 V
Supply to sensor.
Short-circuit-protected 30 mA
Input for analog signal,
0-20/4-20 mA or 0-10 V
and 22.6 V or 35 VDC.
rms peak
Diagram
CU 3X2
L
L
N
N
PE
CU 3X2 IO 351
A1 A
Y1 Y
B1 B
10
11
12
13
14
47
50
1
51
53
2
54
3
57
58