The Control Module Design - Nibe SMO 20 Installer Manual

3 The Control Module Design

PF3
SF1
X1
L N 1 1 0 PE
AA4-XJ3
AA2
LEK
UB1
FA1
X1
L N 1 1 0 PE
AA2
LEK
8 Chapter 3 | The Control Module Design
2 3 4
AA4-XJ4
UB2
2 3 4
Electrical components
AA4
AA2 Base card
AA4 Display unit
X2
AA4-XJ3 USB socket
AA4-XJ4 Service outlet (No function)
AA7 Extra relay circuit board
FA1 Miniature circuit-breaker
X1 Terminal block, incoming electrical supply
X2 Terminal block, control signal circulation pump,
sensors AUX inputs and heat pump
AA7
SF1 Switch
PF3 Serial number plate
UB1 Cable grommet, incoming supply electricity,
power for accessories
UB2 Cable gland, signal
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
AA7
SMO 20