Wilo Stratos MAXO Notice De Montage page 26

Installation and operating instructions Wilo-Stratos MAXO/-D/-Z
Electrical connection
▪ Never connect to an uninterruptible power supply.
▪ A pulsed power supply (e.g. phase angle control) is not permissible! Deactivate a pulse.
▪ Switching the pump via triacs/solid-state relays must be examined on a case-by-case
basis.
▪ During deactivation with on-site power relay: Rated current ≥ 10 A, rated voltage
250 V AC.
Irrespective of the rated current of the pump, peak currents of up 10 A may occur every
time the power supply is switched on!
▪ Observe the switching frequency:
– Switching on/off mains voltage ≤ 100/24 h
▪ Increased number of switch-on/off procedures ≤ 20/h (≤ 480/24 h) permissible with:
– Digital input with ext. OFF function
– Analogue setpoint specification with switch-off function
– Switch signals using communication interfaces (e.g. CIF module, Wilo Net or
Bluetooth)
▪ To protect against leakage and for strain relief to the threaded cable gland, use a con-
nection cable with sufficient outer diameter.
Fig. 21: Preparing the connection
▪ The cables near the screwed connection are to be bent to form a drain loop, to drain
any accumulated drips.
▪ Use a heat-resistant connection cable if fluid temperatures exceed 90 °C.
▪ Lay the connection cable in such a way that it touches neither the pipes nor the pump.
Terminals are intended for rigid and flexible conductors with or without ferrules.
Connection
Mains plug
SSM
SBM
Digital input 1 (DI 1)
Digital input 2 (DI 2)
24 V output
Analogue input 1 (AI 1)
Analogue input 2 (AI 2)
Wilo Net
Table 11: Cable requirements
*
Cable length ≥ 2 m: Use shielded cables.
**
When using ferrules, the maximum cross-section for communication interfaces is re-
duced to 1 mm². All combinations up to 2.5 mm² are permissible in the Wilo-Connector.
WARNING
Electric shock!
When connecting SSM/SBM lines, care should be taken to separate the SELV section,
thus ensuring SELV protection is maintained!
Terminal cross-sec- Terminal cross-sec-
2
tion in mm tion in mm
Min. Max.
3x1.5 3x2.5
2x0.2 2x1.5 (1.0
2x0.2 2x1.5 (1.0
2x0.2 2x1.5 (1.0
2x0.2 2x1.5 (1.0
1x0.2 1x1.5 (1.0
2x0.2 2x1.5 (1.0
2x0.2 2x1.5 (1.0
3x0.2 3x1.5 (1.0
en
Cable
2
** *
)
** *
)
** *
)
** *
)
** *
)
** *
)
** *
)
**
) Shielded
137