Three-Step Switch SU/SA
Operating Instructions
4
EN
2.2 Electrical connection
Before any maintenance or installation work or before opening the terminal compart-
ment, the device must be fully isolated from the power supply. The electrical connec-
tion must be carried out only by a qualified electrician in accordance with the follo-
wing wiring diagram.
The relevant safety regulations, standards (VDE 0100 and VDE 0700 as well as the technical
connection conditions of the local electricity supply companies and accident prevention regu-
lations) must be observed. The Installation and Operating Instructions for the fan must also
be observed.
2.3 Technical data
SU-3 10
For flush mounting, installation in deep FM box (D 65 mm)
Power supply Input
10 V DC Ri=12.5 kOhm
(safety extra-low voltage)
Internal consumption
1.5 mA
Control output
0 to 10 V DC
optional via switch
or external switching
Protection category
IP30
(installed)
Protection class
III
Dimensions mm
W 80 x H 80 x D 15
protr.
Wiring diagram
SS-1022
Ref. no.
4266
SA-3 10
For surface mounting
Power supply Input
10 V DC Ri=12.5 kOhm
(safety extra-low voltage)
Internal consumption
1.5 mA
Control output
0 to 10 V DC
optional via switch
or external switching
Protection category
IP30
(installed)
Protection class
III
Dimensions mm
W 80 x H 80 x D 60
Wiring diagram
SS-1022
Ref. no.
4267
2.3 Basic circuit diagram
Depending on the fan type to be connected, multiple fans may be connected to a three-
step switch in para llel.
ATTENTION
m
NOTE!
Fig.2
EC
fan
Three-step
speed switching
