11
99B138120x-mub-en | 2014/11 | V05
EN
3.4
Terminal pin assignments
The following tables and wiring diagrams show the assignment of the external compon-
ents (pumps, sensors) to the controller terminal pins for the corresponding variants of the
domestic hot water modules.
3.4.2 FriwaMini
Inputs
Terminal
Individual operation mode /
Cascade operation mode
1,
Flow temperature, primary (TVL)
2,
---
3,
Optional: sensor for tank temperature (TSP)
4,
Cold water temperature, secondary (TKW)
E.1, T
Domestic hot water temperature, secondary
E.1, V‘
Flow rate, secondary
Outputs
Terminal
Individual operation mode
Cascade operation mode
R1, N
---
Sequence valve
R2, N
Return valve (optional)
Return valve
(optional, at the master controller)
R3, N
---
---
L
const.
, N
Primary pump,
Secondary pump (circulation)
Primary pump,
Secondary pump
(circulation, at the master controller)
PWM R1,
Primary pump
Primary pump
PWM R2,
Secondary pump (circulation)
Secondary pump
(circulation, at the master controller)
Rs, Rs
Alarm
Alarm
The active valve R1 is not displayed on the controller display.
E.1
E.1
1
4
R2
R1
L
const.
PWM (R)2
L
const.
PWM (R)1
3