The ABB BCI/S 1.1.1 Boiler/Chiller Interface (order code BCI/S1.1.1) bridges KNX HVAC control to conventional heat and cold generators. It outputs a 0…10 V set-point, monitors generator status via binary inputs, and switches enable and pump circuits with relays.

Commission with ETS and the official .knxprod; ABB i-bus® Tool supports advanced diagnosis. Pair with application controllers such as AC/S1.1.1 for plant-level strategies.

Key Features

• 0…10 V set-point output: Drive boiler/chiller analogue set-point inputs from KNX.
• Binary status inputs: Monitor generator operating status (potential-free).
• Enable & pump relays: Relay outputs (typically 5 A) for enable and circulation pump.
• Pump feedback inputs: Additional binary inputs for pump status monitoring.
• ETS + i-bus Tool: Standard parameterization plus diagnostic tooling.
• HVAC stack: Combine with AC/S1.1.1 / AC/S1.2.1 for full plant automation.

At a Glance

Specification	Detail
Product type	KNX boiler/chiller interface, MDRC
Order code	BCI/S1.1.1
Product ID	2CDG110222R0011
Analogue output	0…10 V set-point
Binary inputs	Generator status + pump feedback
Relays	Enable and pump (typ. 5 A)
Width	6 MW
Bus system	KNX TP

Technical data, installation instructions, ETS .knxprod, drawings, EPLAN, and declarations are under Downloads.

Applications

• Boiler integration: Map KNX heat demand to 0–10 V set-point and enable contacts.
• Chiller control: Same interface pattern for cold generators.
• Pump interlocking: Switch and monitor circulation pumps from KNX.
• Plant supervision: Feed status into AC/S1.1.1 or BACnet via AC/S1.2.1.

Installation Notes

Mount on a 35 mm DIN rail (6 MW). Wire KNX, 0…10 V output, binary inputs, and relay contacts per the connection diagram. Import the official .knxprod from Downloads; use i-bus® Tool for commissioning checks.