The ABB FCC/S1.5.2.1 Fan Coil Controller (2 x PWM, 0-10 V fan, manual) is an MDRC KNX device for 2-pipe / 4-pipe fan-coil units. It can run as an integrated room-temperature controller or as a pure actuator. 2× PWM valves + 0–10 V continuous fan; with manual operation.

Four universal inputs support window contacts, dewpoint/condensate alarms, PT1000 sensors, or ABB SAF/A room units. Bus-powered (no separate aux mains). Without manual: FCC/S1.5.1.1. Companion blower-only actuators: FCL/S1.6.1.1.

Key Features

• Valve outputs: 2× PWM thermoelectric / 1× motor 3-point.
• Fan control: 1× 0–10 V continuous fan.
• Auxiliary relay: 16 A.
• 4 inputs: Binary / temperature / SAF/A room control unit.
• Manual operation: Yes — local front buttons.
• 2-/4-pipe FCU: Pipe layout parameterized in ETS (not SKU-encoded).

At a Glance

Specification	Detail
Product type	KNX Fan Coil Controller, MDRC
Order code	FCC/S1.5.2.1
Product ID	2CDG110235R0011
Valve I/O	2× PWM thermoelectric / 1× motor 3-point
Fan I/O	1× 0–10 V continuous fan
Manual operation	Yes
Auxiliary relay	16 A
Inputs	4
Width	6 MW
Supply	KNX bus only

Product manual, installation instructions, ETS .knxprod, drawings, EPLAN, and declarations are under Downloads.

Applications

• Hotel & office FCU: Heating/cooling coils with staged or EC fans.
• Controller or actuator: Standalone RTC or slave to a room unit / BMS.
• Electric heater stage: Use the 16 A aux relay where available.

Installation Notes

Mount on a 35 mm DIN rail (6 MW). Connect KNX, valve outputs, fan outputs, inputs, and optional aux relay per the connection diagram. Import the unified FCC/S 1.x.x.1 .knxprod from Downloads and select the matching application in ETS.