S+S Regeltechnik THERMASREG FM Series, Operating Instructions, Mounting & Installation

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Schematic diagram FM 020
AI1 Room temperature sensor, Pt1000
G0 Reference potential (ground)
AI2 Temperature setting,
potentiometer 0...500 Ohm
G0
Reference potential (ground)
AI3
Step switch for fan coil convector
G0 Reference potential (ground)
AI4 Input – temperature – not assigned
G0 Reference potential (ground)
G0 Reference potential (ground)
AO1 Output – heating valve 0...10 V
AO2 Output – cooling valve 0...10 V
K1+ Communication –
central building control system, RS485 +
K1– Communication –
central building control system, RS485 –
K2+
Communication –
room unit RS485 +
K2– Communication –
room unit RS485 –
G Supply voltage 24 V AC
G0 Common reference point for
supply voltage 24 V AC
TE Technical ground
Q1 Fan coil convector relay step 1
Q2
Fan coil convector relay step 2
Q3 Fan coil convector relay step 3
COM Common contact for Q1, Q2, Q3
DO4 Semiconductor relay output DO4
C4 Semiconductor relay output DO4
DO5
Semiconductor relay output DO5
C5 Semiconductor relay output DO5
DO1 Output – heating valve,
pulse-width modulated (G against G0)
DO2 Output – cooling valve,
pulse-width modulated (G against G0)
G0 Common reference point for
supply voltage, inputs and outputs
DI1 Input – presence
(switching setback ⁄ normal temperature)
G0 Common reference point for
supply voltage, inputs and outputs
DI2 Input – window contact
(switching normal temperature ⁄ setback – OFF)
DI3 Input – changeover contact
G0 Common reference point for
supply voltage, inputs and outputs
DI4 Input – party switch
K1+ K1- K2- K2+ G0 G TE
AO2
AO1 G0 G0 G0 G0 G0 AI4 AI3 AI2 AI1
COM Q3 Q2 Q1 C5 DO5 C4 DO4 G0 DO2 DO1 DI2 DI1 G0 DI4 DI3 G0
C/O
N
230 V AC
L
24 V AC
RS485
G
G0
K+
K-
FM020