Wilo Stratos MAXO Notice De Montage Et De Mise En Service page 43

7.7 Digital input (DI1) or (DI2) – grey terminal block
Fig. 16: Digital In
The pump can be controlled with the following functions via external potential-free contacts (relay or
switch) at the DI 1 or DI 2 digital inputs:
Function control input DI 1 or DI 2
External OFF
• External MAX
• External MIN
• External MANUAL
• External key lock
switchover heating/cooling
Table 10: Function control input DI 1 or DI 2
Technical data:
• Maximum voltage: < 30 V DC / 24 V AC
• Maximum loop current: < 5 mA
• Operating voltage: 24 V DC
Operating loop current: 2 mA (per input)
NOTICE
See "Adjustment - Manual operation [" 88]" and "Application and function of the digital
control inputs DI1 and DI2 [" 100]" sections for a description of the functions and their pri-
orities
Installation and operating instructions • Wilo-Stratos MAXO/-D/-Z • Ed.02/2023-10
Contact open: Pump switched off.
Contact closed: Pump is switched on.
Contact open: Pump is running in the mode set on the pump.
Contact closed: Pump is running with maximum speed.
Contact open: Pump is running in the mode set on the pump.
Contact closed: Pump is running with minimum speed.
Contact open: Pump is running in the mode set
on the pump or in mode requested via bus communication.
Contact closed: Pump is set to MANUAL.
Contact open: Key lock is deactivated.
Contact closed: Key lock is activated.
Contact open: "Heating" active.
Contact closed: "Cooling" active.
en-US
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