Electrical Data; Digital Inputs; Analog Inputs; Inputs For Ptc Sensor/Thermal Switch - Grundfos IO 351 Instrucciones De Instalación Y Funcionamiento

7. Electrical data

Supply voltage:
1 x 100-240 VAC ± 10 %, 50/60 Hz, PE (Class 1
equipment).
Back-up fuse:
Maximum 10 A. Both standard fuses as well as
quick- and slow-blow fuses are suitable.
Short-circuit protection:
Use fuses that comply with IEC 60127.
USA and Canada (branch circuit protection): Use a
UL/CSA listed non-time delay (high capacity) fuse
that complies with the UL248 series or an inverse
time circuit breaker that complies with UL489.
Fuse types RK1, RKS, J and CC are acceptable.
Power consumption:
Maximum 9 W.

7.1 Digital inputs

Open circuit voltage:
Closed circuit current:
Frequency range:

7.2 Analog inputs

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

7.3 Inputs for PTC sensor/thermal switch

For PTC sensors to DIN 44082. Thermal switches
can also be connected.
Open circuit voltage:
Closed circuit current:
10

7.4 Digital outputs (relay outputs)

7.5 Analog outputs

All outputs are short-circuit protected.

7.6 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
The terminals of the groups 3A, 3B and 3C are
< 250 Ω
isolated from all other terminal groups by reinforced
insulation, 2224 VAC.
> 50 kΩ ± 10 %
24 V, maximum 50
mA, short-circuit
protected
12 VDC ± 15 %
2.6 mA, DC
All control terminals in groupe 3 are supplied with
PELV voltage (Protective Extra-Low Voltage).
Normally open contacts:
Maximum contact load:
Minimum contact load:
Output signal:
Repetitive accuracy:
Maximum output current:
5
3B
3A
1
Fig. 8 Terminal groups
Group 1: Connection of supply voltage
Group 2: Digital outputs 1-3
Digital inputs
Group 3A, B, C:
Analog inputs and outputs
Inputs for PTC sensor or thermal
Group 4A, B:
switch
Group 5: Digital outputs 4-7
C, NO
240 VAC, 2 A
5 VDC, 10 mA
0-10 V +2/-0 %
± 5 % of full scale
2 mA
3C
4B
4A
2