ABB i-bus KNX, Product Manual, Page: 9 / 264

ABB i-bus
®
KNX
General
FCA/S 1.x.x.1 | 2CDC508134D0202 7
1.2 Product and functional overview
The Fan Coil Actuators FCA/S control a single-phase fan with up to three fan speeds via a step or
changeover control. In the operation mode
Changeover , the actuators ensure that no two fan speeds can
be switched on simultaneously. An additional programmable switch-over delay is provided for this purpose.
Three-phase drives are not supported. The output can be used for control of an electrical load. Manual
operation of the device is possible in the variants FCA/S 1.1.2.2 and FCA/S 1.2.2.2.
Fan Coil Actuators control motor power operated, thermal or analog heating and cooling valves, as well as
multi-level fans, via the outputs.
Three inputs are available, e.g. as signaling contacts for window contact and dew point monitoring or as
temperature inputs. The scanning voltage for the inputs is provided by the device.
The devices are modular installation devices in Pro M design with 6-module widths for installation in a
distribution board. Connection to the ABB i-bus
®
KNX is via the front bus connection terminal. The devices
require no auxiliary voltage. The assignment of the physical address, as well as the setting of parameters,
is carried out with Engineering Tool Software ETS.
Product name description:
Abbreviatio
n Description
F Fan
C Coil
A Actuator
/S MDRC
x. 1 = Single
x.
1 = Electronic Valve Drives (PWM)
2 =
Analog Valve Drives (0…10 V)
x.
1 = Without manual operation
2 = With manual operation
x x = Version number x = 1, 2, etc.
1.2.1 Product overview
FCA/S 1.1.1.2 FCA/S 1.1.2.2 FCA/S 1.2.1.2 FCA/S 1.2.2.2
Operation
Manual operation - x - x
Inputs
Contact scanning or temperature sensor x x x x
Outputs
Switching contact 6 A or fan x x x x
Switching contact 16 A (10 AX) x - x -
Switching contact 20 AX - x - x
Electronic 0.5 A x x - -
Analog 0…10 V
- - x x
With manual operation, the E button activates the device at fan speed 1. The speed can then be increased
to fan speed 2 and fan speed 3 by pressing buttons F and G respectively. To decrease the speed, the
buttons must be pressed in the reverse order. Only then can the device be deactivated by pressing
button E.