The ABB KNX Fan Coil Room Temperature Controller (series 6138/11-xx-500) is a surface-mounted thermostat with backlit LCD and five push-buttons for heating/cooling and fan-coil control on ABB i-bus® KNX. It supports 2- and 4-pipe fan coil units as well as conventional HVAC, with hotel-friendly operating modes.

Available in white and aluminium finishes.

Key Features

• Backlit LCD: Shows operating mode, setpoint, and status with international symbols.
• 5 buttons: On/off · comfort/standby, temperature up/down, fan stage, °C/°F.
• Fan coil ready: Controls 2- and 4-pipe fan coil units and conventional A/C.
• Modes: Heating/cooling, heating only, or cooling only.
• Integrated bus coupler: No separate BCU required.
• Two finishes: White (6138/11-84-500), Aluminium (6138/11-83-500).

At a Glance

Specification	Detail
Product type	Fan coil room thermostat with backlit LCD — 2-/4-pipe HVAC
Order codes	6138/11-84-500 · 6138/11-83-500
Display	Backlit LCD
Controls	5 push-buttons
Systems	2-/4-pipe fan coil · conventional HVAC
Dimensions	81 × 81 × 20 mm
Protection	IP20
Bus system	KNX twisted pair (TP)
Finishes	White · Aluminium

Select a finish below for the exact manufacturer order code (SKU) and pricing. Full details are listed under Technical Specifications.

Order Codes — Finish Variants

Finish	Order code	Product ID
White	6138/11-84-500	2CKA006138A0003
Aluminium	6138/11-83-500	2CKA006138A0005

Installation Notes

Surface-mounted without a separate frame (81 × 81 × 20 mm). Available in studio white (−84) and aluminium silver (−83).