Electrical Data; Inputs; Outputs; Terminals - Grundfos CU 401 Instrucciones De Instalación Y Operación

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5. Electrical data

5.1 Inputs

Pulse counter input
Data:
Max. frequency
Insulation voltage
Output voltage
(open contact)
Output current
(closed contact)
Analog inputs
Voltage input:
Voltage category
Insulation voltage
Insulation test voltage
Voltage range, optional
Input resistance
Input resolution
Accuracy at 25°C
Resolution
Current input:
Current range, optional
Input resistance
Input resolution
Accuracy at 25°C
Resolution
Filter times:
Integration time
Reading interval
All analog inputs are short-circuit protected.
10
10 kHz
50 V
(to system earth)
5 V, internal 1 kΩ
pull-up
5 mA
II
50 V
(to system earth)
700 VDC
0-10 V
2-10 V
150 kΩ
2.4 mV
±0.1%
12 bits
0-20 mA
4-20 mA
250 Ω
5 µA
±0.1%
12 bits
40 ms
160 ms
Digital inputs
Data:
Voltage category
Insulation voltage
Insulation test voltage
Output voltage
(open contact)
Output current
(closed contact)
Input filter times
(software)
Input filter times
(hardware)
The digital inputs are activated by short-circuiting the
input concerned to 0 V, e.g. with a contact or a relay.
The pulse counter input, digital inputs and analog
inputs have the same minus potential. The inputs are
not isolated from each other.

5.2 Outputs

Relay outputs
Data:
Voltage category
Insulation voltage
Insulation test voltage
Max. connection voltage
Max. load
Min. load
Max. load power AC/DC

5.3 Terminals

Supply 24 V ±7%
Terminal designation
+
–
Note: The supply module PU 101 must only be used
for the CU 401. If the PU 101 is used for other pur-
poses, e.g. sensor supply, the galvanic separation
will be ignored.
Pulse counter input
Terminal designation
CNT
0
SHLD
II
50 V
(to system earth)
700 VDC
24 V, internal 4.7 kΩ
pull-up
5 mA
0, 15, 30, 45 ms
6 ms
III
400 V
(to system earth)
4 kVAC
400 VAC
400 VAC, 2 A, AC15/
24 VDC, 2 A, DC13
5 V/10 mA
400 VA/48 W
Description
+24 VDC max. 3 A
0 VDC
Description
Pulse counter/frequency
0 V
0 V (screen)