STRA-14 Room controller. Installation and maintenance manual.
Fläkt Woods
8710 GB 2016.09.08
4 (12)
Specifications are subject of alteration without further notice.
Wiring
STRA-14 has been constructed to be as compact as possible. Therefore, the controller’s communication input is not
galvanically separated from the supply voltage. This means that it is important to keep G and G0 in order, as well as the
communication input’s A and B.
All units that share the same transformer and communication loop must use the same transformer-pole for G (terminal
10) and G0 (terminal 11). On the communication loop the A-terminal (terminal 42) should only be connected to another
A-terminal and the B-terminal (terminal 43) to another B-terminal. Otherwise, there is great danger of short-circuit with
damaged components as a result.
Terminal
Designation
Operation
10
G
Supply voltage 24 V AC
11
G0
Supply voltage 0 V
12 - 14
No function.
20
GDO
24 V AC out common for DO. Internally connected to terminal 10, G.
21
G0
0 V common for UO. Internally connected to terminal 11, G0.
22
UO3
Control output ventilation.
3 put analog (FS). The valve actuator’s 0…10 V control signal terminal is connected to terminal 22 and its supply
terminals to terminals 10 and 11. Make sure that the reference pole G0 is connected to the correct terminal on
the actuator.
23
UO1
Control of heating.
For 0...10 V DC valve actuator, max 5 mA. The valve actuator’s 0…10 V control signal terminal is connected to
terminal 23 and its supply terminals to terminals 10 and 11. Make sure that the reference pole G0 is connected
to the correct terminal on the actuator.
alternative
For 24 V AC thermal actuator, max 2,0 A (FS). The thermal actuator is connected between terminals 23 and 20,
GDO.
24
UO2
Control output cooling.
For 0...10 V DC valve actuator, max 5 mA. The valve actuator’s 0…10 V control signal terminal is connected to
terminal 24 and its supply terminals to terminals 10 and 11. Make sure that the reference pole G0 is connected
to the correct terminal on the actuator.
alternative
For 24 V AC thermal actuator, max 2,0 A (FS). The thermal actuator is connected between terminals 24 and 20,
GDO.
30
AI1
For external room sensor, PT1000. Measuring range 0...50°C. Sensor is connected between terminals 30 and
41, AGnd.
31
AI2
For 0-10V CO
2
sensor input.
32
DI1
Occupancy detector. A potential-free contact is connected between terminals 32 and 40, +C. Closed contact
corresponds to occupancy.
See also section Occupancy detector in the chapter Operating modes.
33
DI2/CI
Fläkt Woods condensation detector STRZ-16 (FS). The sensor is connected between terminals 33 and 41, AGnd.
alternative
Window contact (DI). A potential-free contact is connected between terminals 33 and 40, +C. Closed contact
indicates closed window.
40
+C
24 V DC out common for DI and UI (with digital function)
41
AGnd
Analogue ground, reference for AI and UI (with analogue function)
42
A
RS485-communication A -
43
B
RS485-communication B +
