External interfaces
Where is the external differential pressure sensor (DDG) connected?
A DDG is connected either to the analogue input 1 (AI1) or to the analogue input 2 (AI2).
How many external DDGs can be connected to the pump?
Only one DDG can be connected.
What settings have to be configured on the pump to connect a DDG?
Settings → External interfaces → Function analogue input (AI1 or AI2) function → Set analogue input → Differential pressure sensor.
How does the PID control work?
The PID controller (proportional-integral-derivative controller) consists of the components P term, the I term and the D term. In theory, this control function enables continuous monitoring and correction of the system parameters. In circuits where there are very rapid changes, the I term (response time) can be shortened to ensure that the setpoint is always adhered to.
Are further accessories required for the Multi-Flow Adaptation function?
- Case A – without mixer in the secondary loops
- No. The pumps are only wired to each other. No additional accessories are required besides the cables.
- Case B – with mixer in the secondary loops
- Yes. Two temperature sensors are required for the feeder pump. 1x for the primary feed upstream of the heat exchanger or hydraulic shunt.
1x downstream of the heat exchanger or hydraulic shunt.
Furthermore, a temperature sensor is required for both the feed and return for the secondary pumps in the secondary loop. The internal temperature sensor may also be used depending on the installation position and the pump version. The heating or cooling quantity measurement must be activated on the pumps.
After changing the pump from Stratos to Stratos MAXO, how does the connection of the 2-wire cable provided by the customer to the SSM connection of the Stratos MAXO work?
The Stratos SSM connection is a potential-free normally closed contact, the Stratos MAXO SSM connection is a potential-free changeover contact. The 2-wire cable must be connected to terminals 75 and 76 of the Stratos MAXO.
Can the analogue input (AI1 or AI2) also be used as output?
The analogue inputs cannot be used as outputs.