Wilo Stratos MAXO, Installation And Operating Instructions Manual

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Installation and operating instructions Wilo-Stratos MAXO/-D/-Z 41
2. Remove the module cover.
➜ Fig. 22
▪ Follow the detailed instructions online for further steps!
➜ See QR code or www.wilo.com/stratos-maxo/om
6.4 Analogue input (AI1) or (AI2) - purple terminal block
➜ Fig. 23
Analogue input for following signals:
▪ 0 – 10 V
▪ 2 – 10 V
▪ 0 – 20 mA
▪ 4 – 20 mA
▪ PT1000
Dielectric strength: 30 V DC / 24 V AC
The analogue inputs can be used for the following functions:
▪ External setpoint specification
▪ Sensor connection: temperature sensor, differential pressure
sensor, PID sensor
▪ Terminal for supplying active sensors with 24 V DC
– Maximum current load: 50 mA
▪ Analogue input load (0) 4 – 20 mA: ≤ 300 Ω
– Load resistance at 0 – 10 V: ≥ 10 kΩ
6.5 Digital input (DI1) or (DI2) - grey terminal block
➜ Fig. 23
Digital input for potential-free contacts:
▪ 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)
The pump can be controlled with the following functions via ex-
ternal potential-free contacts at the DI1 or DI2 digital inputs:
▪ External OFF
▪ External MAX
▪ External MIN
▪ external MANUAL
▪ External key lock
▪ Heating/cooling switchover
In systems with a high switching frequency (> 100 on/off opera-
tions per day); switching on/off takes place via “External OFF”.
6.6 Wilo Net – green terminal block
Wilo Net is a Wilo system bus used for establishing communication
between Wilo products:
▪ Two single pumps as twin-head pump function
▪ Several pumps used with Multi-Flow Adaptation control mode
▪ Gateway and pump
Follow the detailed instructions online for connection.
➜ See QR code or www.wilo.com/stratos-maxo/om
6.7 Collective fault signal (SSM) – red terminal block
➜ Fig. 23
An integrated collective fault signal is applied at the SSM terminals
as a potential-free changeover contact.
Contact load:
▪ Permitted minimum: SELV 12 V AC / DC, 10 mA
▪ Permitted maximum: 250 V AC, 1 A, AC1 / 30 V DC, 1 A