img cbx 8r8 product page image


CBX-8R8 is a fully programmable BTL-listed BACnet Advanced Application Controller (B-AAC) that communicates on an RS-485 local area network and supports multi-protocol communications simultaneously including BACnet MS/TP and Modbus RTU. The CBX-8R8 controller provides 8 UniPuts™ with Relay and 8 Universal Inputs as well as support for up to three FLX (Field Level eXpansion) series extension modules providing up to 64 points of control PDF Datasheet


img cbx 8r8 with 3 modules cbx page image

The CBX-8R8 is designed for a wide range of applications for intelligent control of HVAC equipment, lighting control and electrical systems including metering applications.

Product Models

  CBX-8R8 FLX-8R8(-H) CBX-8R8 + 1 x FLX-8R8 CBX-8R8 + 2 x FLX-8R8 CBX-8R8 + 3 x FLX-8R8

Universal Inputs Hardware connections that can be used as analog or digital inputs (software selectable)

8 8 16 24 32

UniPuts TM + Relays (Hardware connections that can be used as inputs, outputs, or relays (software selectable)

8 8 16 24 32

Total Inputs + Outputs

16 16  32 48 64
Max Inputs 16 16  32 48 64
Max Outputs 8 8 16 24 32

Up to 64 Points of Control when combined with three FLX extension modules

Hand/Off/Auto Local Override Function (FLX-8R8-H model)

Support for Cylon smart thermostat bus

LED status on all I/O channels provides indication of fault or override status

Compact form factor to maximize enclosure space

Easy module expansion using simple bus connectors

Up to 64 Trendlogs, 1024 entries per Trendlog

On-board Modbus RTU integration (available Q3 2018)

Key Benefits

  • Cost Effective Solution
  • Quick & Easy Installation with Modular Hardware Design
  • Reduced Diagnostic Time
  • Reduced Time on-site
  • Efficient Post Installation Checks & Testing
  • Flexibility to Expand

img cbx 8r8 cost effective graphic


Quick & Easy Installation with Modular Hardware Design

  • Replace or Extend I/O points quickly and easily.
  • FLX Modules snap together without the need for the System Integrator to prepare special cabling. However, when necessary, a cable can be used to extend the FLX modules a total distance of 300 meters (1,000 feet) from the CBX controller.
  • I/O bus / power connection is achieved through a single plug connector, simplifying the installation process and eliminating the possibility of misconnection between components of a CBX system trunk.

Reduced Diagnostic Time

  • Tool free diagnostics to facilitate instant identification of wiring faults.
  • Status LEDs included for all I/O points instantaneously provide visual diagnostic and error status for each connected system point reducing problem solving time.

Reduce Time On-Site

  • Pre-configuring of the FLX expansion module via the FLX dip switch addressing facility:
  • Reduces on-site installation time
  • sSmplifies setup and system checks, and
  • Reduces the skill level for hardware upgrade or expansion.

Efficient Post Installation Checks and Testing

  • Manual over-ride of UniPuts™ enable easy configuration, quick commissioning and post installation testing without the need to connect to Engineering Centre. Over-ride of UniPuts™ can be undertaken through Engineering Centre or locally using the HOA facility where available. Hand / Off / Auto local over-ride function (Available for FLX UniPuts™).

Flexibility to Expand

  • Flexibility to Expand up to 64 points of control with FLX-8R8 and FLX-8R8-H Field Level eXpansion modules.

img cbx 8r8 side on


Type STM32 ARM Cortex-M3 processor
System Memory 1MByte external SRAM + 16 Mbyte external flash (soldered to PCB not removable)
Supply Requirements 24 V AC ±20 % 50/60 Hz
Termination PCB mounted plug terminal connections
Conductor Area Max: AWG 12 (3.09 mm2) Min: AWG 22 (0.355 mm2)
Temperature & Humidity  32° to 122° F (0° to 50° C) / 0-90% RH non-condensing
EMC Immunity  EN 61326-1: 2013
EMC Emission  EN 61326-1: 2013, EN 61000-3-2: 2014, EN 61000-3-3: 2013
Size  6.5 x 3.55 x 2.25” (166 x 89.5 x 57 mm) excluding terminal plugs
Enclosure & Mounting  Injection-molded ABS / DIN Rail

One Technology Lane
Export, PA 15632
(724) 733-2000 [P]

New Hampshire
25 Sundial Avenue Suite 310W
Manchester, NH 03103
(724) 733-2000 [P]


(724) 733-2000
This email address is being protected from spambots. You need JavaScript enabled to view it.
Dealer Toolbox
Cylon Energy Support