Grundfos CU 323 Series - Input;Output Overview and Diagrams

English (GB)
18
8.4 Overview of inputs and outputs
Legend
For position numbers, see fig. 10.
Abbreviation Description
AI Analog input
CCommon
DI Digital input
DO Digital output
NC Normally closed contact
NO Normally open contact
PTC Positive temperature coefficient
RO Relay output
Pos. Terminal Designation Data Diagram
1
L
Connection to
phase conductor
1 x 100-240 VAC ± 10 %, 50/60 Hz
N
Connection to
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 Connection to external fieldbus, see installation and operating instructions for the CIM module.
4
30 PTC 1
Input for PTC sensor or thermal
switch.
31 GND, PTC
32 PTC 2
33 GND, PTC
34 PTC 3
5
50 +24 V
Supply to sensor.
Short-circuit-protected 30 mA.
51 AI1
Input for analog signal, 0-20 mA,
4-20 mA or 0-10 V.
53 +24 V
Supply to sensor.
Short-circuit-protected 30 mA.
54 AI2
Input for analog signal, 0-20 mA,
4-20 mA or 0-10 V.
55 GND
All terminals, except mains terminals, must only be connected to voltages not exceeding 16 Vrms and
22.6 Vpeak or 35 VDC.
L
N
CU 323
L
N
PE
A
Y
B
CU 323 E-pump
A1
Y1
B1
34
33
32
31
30
PTC 1
CU 323
PTC 3
PTC 2
54
53
50
51
55
1
2
CU 323