Cable Length; Fuses And Cable Cross-Section; Inputs And Outputs - Grundfos CU331SP Installation And Operating Instructions Manual

15.5 Cable length

Maximum length, screened motor cable
Maximum length, unscreened motor cable
Maximum length, signal cable

15.6 Fuses and cable cross-section

Warning
Always comply with national and local
regulations as to cable cross-sections.
15.6.1 Cable cross-section to signal terminals
Maximum cable cross-section to signal
terminals, rigid conductor
Maximum cable cross-section to signal
terminals, flexible conductor
Minimum cable cross-section to signal
terminals
15.6.2 Non-UL fuses and conductor cross-section to mains
and motor
Typical shaft Maximum
power P2 fuse size
[Hp] [A]
2 40
3 40
5 80
1)
Screened motor cable, unscreened supply cable.
15.6.3 UL fuses and conductor cross-section to mains and
motor
Typical shaft Maximum
Bussmann
power P2 fuse size
[Hp] [A]
2 40 KTN-R40
3 40 KTN-R40
5 80 KTN-R80
1)
Screened motor cable, unscreened supply cable.
18
500 ft (152 m)
1000 ft (305 m)
1000 ft (305 m)
AWG 14
AWG 18
AWG 20
Maximum conductor
Fuse 1
cross section
type
2
AWG
[mm ]
gG 7 10
gG 7 10
gG 7 10
Maximum conductor
1
cross section
RK1
[AWG]
7
7
7

15.7 Inputs and outputs

15.7.1 Mains supply (L1, L2)
Supply voltage
Supply frequency
Maximum temporary imbalance between
phases
Leakage current to earth
Number of cut-ins
Do not use the power supply for switching the
Note
Note
CU331SP on and off.
15.7.2 Motor output (U, V, W)
Output voltage
Output frequency
Switching on output
1)
Output voltage in % of supply voltage.
15.7.3 RS-485 GENIbus connection
Terminal number
The RS-485 circuit is functionally separated from other central
circuits and galvanically separated from the supply voltage
(PELV).
15.7.4 Digital inputs
Terminal number
Voltage level
Voltage level, open contact
Voltage level, closed contact
Maximum voltage on input
Input resistance, R
i
All digital inputs are galvanically separated from the supply
voltage (PELV) and other high-voltage terminals.
15.7.5 Signal relays
Relay 01, terminal number
Relay 02, terminal number
Maximum terminal load (AC-1)
Maximum terminal load (AC-15)
Maximum terminal load (DC-1)
Minimum terminal load
1)
IEC 60947, parts 4 and 5.
C Common
NO Normally open
NC Normally closed
The relay contacts are galvanically separated from other circuits
by reinforced insulation (PELV).
200-240 V ± 10 %
60 Hz
3 % of rated value
> 3.5 mA
Max. 1 time/min.
1)
0-100 %
0-60 Hz
Not recommended
68 (A), 69 (B), 61 GND (Y)
18
0-24 VDC
> 19 VDC
< 14 VDC
28 VDC
Approx. 4 kΩ
1 (C), 2 (NO), 3 (NC)
4 (C), 5 (NO), 6 (NC)
1)
240 VAC, 2 A
1)
240 VAC, 0.2 A
1)
50 VDC, 1 A
24 V DC 10 mA
24 V AC 20 mA