Digital Inputs; Analog Inputs; Digital Outputs (Relay Outputs); Fig. 9 - Grundfos CU 351 Installation And Operating Instructions Manual

9.1 Digital inputs

Open circuit voltage:
Closed circuit current:
Frequency range:

9.2 Analog inputs

Input current and voltage:
Tolerance:
Repetitive accuracy:
Input resistance, current:
Input resistance, voltage:
Supply to sensor:

9.3 Digital outputs (relay outputs)

NO contacts:
Maximum contact load:
Minimum contact load:

9.4 Conductors

Rigid conductors
Flexible conductors without
ferrule
Flexible conductors with
ferrule
With/without plastic collar
12
9.5 Terminal groups
24 VDC
5 mA, DC
0-4 Hz
0-20 mA
4-20 mA
0-10 V
± 3.3 % of full
scale
± 1 % of full scale
< 250 Ω
10 kΩ ± 10 %
The terminals of the groups 2, 3, 4 and 5 are
24 V, maximum
insulated from all other terminal groups by reinforced
50 mA, short-
insulation, 2224 VAC.
circuit protected
C, NO
240 VAC, 2 A
5 VDC, 10 mA
2
All control terminals in group 2, 3, 4 and 5 are
0.5 - 2.5 mm
supplied with PELV voltage (Protective Extra-Low
20-13 AWG (US)
Voltage).
2
0.5 - 1.5 mm
20-13 AWG (US)
70
71
6
72
73
74
75
50
51
5
53
54
57
58
B Y A
10 11 12 13 14
4 3

Fig. 9

Terminal groups
Group 1 Connection of supply voltage
Group 2 Internal GENIbus connection
External GENIbus connection
Group 3
(not standard)
Group 4 Digital inputs
Group 5 Analog inputs
Group 6 Digital outputs
A1 Y1 B1 L N
2 1