— TECHNICAL DATA SHEET DS0128 rev 23 CBT-4T4-2U1R ©ABB 2021 All Rights Reserved. Subject to change without notice WWW.CYLON.COM page 1 of 4 DS0128 rev 23 DESCRIPTION The CBT-4T4-2U1R is a freely programmable BACnet® Unitary Controller with native MS/TP communications support. The controller is BTL listed as a BACnet Advanced Application Controller (B-AAC) and is ideally suited for the control of Fan Coil Units with ECM motors, Heat Pumps, Unit Ventilators, Unit Heaters, Chilled Ceilings/Beams and custom unitary equipment. Part of Cylon’s CB Line of BACnet field controllers, the CBT-4T4-2U1R features 4 Uniputs™ with Triac (configurable as inputs OR outputs), 4 Universal Inputs, 2 UniPuts, 1 Digital Output with a high-power relay output and a dedicated input for Cylon’s CBT-STAT or UCU Room Display intelligent room sensors. APPLICATION The CBT-4T4-2U1R is suitable for controlling a variety of small to medium-sized HVAC equipment such as: ▪ Fan Coil Units with ECM ▪ Heat Pumps ▪ Unit Ventilators ▪ Chilled Ceilings/Beams ▪ Unit Heaters ▪ Exhaust Fans ▪ Custom Unitary Equipment The controller accommodates available pre-engineered strategies or can be tailored to custom applications using CXpro ᴴᴰ programming software. 4 Uniputs with Triac Configured as analog or digital outputs, or voltage inputs along with Triac functionality that can switch a 24 V AC load 4 Universal Inputs Can be configured as analog or digital inputs with pulse counting on the 4th input 2 UniPuts Can be configured as analog or digital output or voltage inputs 1 Digital (Relay) Output Can switch high inrush loads up to 240 V AC, 8 Amps BACnet MS/TP Fieldbus Supports the following configurable BACnet objects: AI/AO/BI/BO/AV/BV, Trend Logs, and Schedules Cylon Intelligent Room Sensor support Up to 500 Strategy Blocks Up to 6 Trendlogs 1024 entries per Trendlog Data Security Strategy and setpoints backed up in Flash No Hardware I/O Jumpers Hardware points are automatically configured by the downloaded strategy ©ABB 2021 All Rights Reserved. Subject to change without notice WWW.CYLON.COM page 2 of 4 DS0128 rev 23 SPECIFICATIONS MECHANICAL Size (excluding terminal plugs) 5.7 x 5.12 x 1.78” [145 x 130 x 45 mm] Enclosure Injection molded, flame retardant ABS plastic Mounting DIN rail - The housing base is designed for snap-mounting on DIN rails - The controller should not be freely accessible after mounting - Unit must be oriented such that powered relay terminals are at the bottom of unit CONNECTION Note: Use Copper or Copper Clad Aluminum 70 °C (158 °F) conductors only. Terminals PCB mounted plug terminal connections Conductor Area Max: AWG 12 (3.09 mm²) Min: AWG 22 (0.355 mm²) ENVIRONMENT Note: This equipment is intended for field installation within an enclosure. Ambient Temperature 0 C … 50 C [32 F … 122 F] ambient. Ambient Humidity 0% … 90% RH non-condensing Storage Temperature -30 C … +70 C (-22 F … 158 F) EMC Immunity EN 55024, 2010 EMC Emission EN 55022, 2010 Class A Approvals BTL Listed – BACnet Advanced Application Controller (B-AAC) UL Listed (CDN & US) UL916 Energy Management Equipment - File No. E176435 Safety EN 60730-1:2011 Automatic Action type i.e. Type 1.B.Y Approved Pollution Degree Class 2 (EN 60730-1) ELECTRICAL Supply Requirements 24 V AC/DC +15 % / –20 % 50/60 Hz Transformer Rating 12 VA typical, 81 VA max with all external loads Relay Rating 250 V AC @ 8 A BACnet Loading ¼ unit load device PROCESSOR Type STM32 F103ZET6 32bit processor Clock Speed 8 MHz crystal, 72 MHz internal processor clock rate System Memory (soldered to PCB not removable) Internal Flash 512 Kbyte Internal SRAM 64 Kbyte External Flash 16 Mbyte External SRAM 1 Mbyte COMMUNICATIONS Local serial port USB Micro-B socket (used as service port) BACnet MS/TP port RS485 @ 9K6, 19K2, 38K4 or 76K8 Baud (defaults to 38K4) Max cable length 1.2 km Local STAT Port RS485 with a maximum cable length 500 m Supports CBT-STAT and UCU Room Display INTERFACE Engineering Software CXpro HD INPUTS / OUTPUTS Note: Shielded cable is recommended for all input connections. UniPuts with Triac When configured as Input: Analog Input Range: 0 … 10 V @ 40 kΩ Resolution: 12 bit Digital Volt-Free contact, @ 25 mA not continuous When configured as Output: Analog Output 0 … 10 V, 20 mA, 12-bit resolution Digital Output 0 … 10 V, 20 mA 24 V AC Triac @ 500 mA maximum. Switch live. UniPuts When configured as Input: Analog Input Range: 0 … 10 V @ 40 kΩ Resolution: 12 bit Current input Range: 0 ... 20 mA @ 390 Ω Note: Current Input requires user-supplied external 390 Ω resistance. Accuracy: depends on user supplied external resistor Digital Volt-Free contact, @ 25 mA not continuous When configured as Output: Analog Output 0 … 10 V, 20 mA, 12-bit resolution Digital Output 0 … 10 V, 20 mA Universal Inputs Analog Input Range: 0 … 10 V @ 130 kΩ Resolution: 12 bit Temperature measurement Range: 0 °C … +50 °C (32 °F … 122 °F ) Resolution: 12 bit Passive Input for a large range of temperature sensors. 10K3A1 sensors are recommended. Note: It is not recommended using Sensors with a heating dissipation constant (K factor) < 2 as this will lead to an offset error. Current input Range: 0 … 20 mA @ 390 Ω Accuracy: ±0.5% full scale [100μA] Digital Volt-Free contact, Dry Contact Note: Only Universal Input 4 supports pulse counting at below 20 Hz and a minimum pulse width of 25 milliseconds. Relay Digital Output Relay Contacts with ability to switch up to 240 V AC Maximum Load: 240 V AC / 8 A max 24 V AC output terminal Total current drawn from 24 V AC terminals is limited to 0.9 A. Notes: 1) All inputs and outputs are protected against short circuit, as well as over-voltage up to 24 V AC. SOFTWARE FEATURES Maximum number of Strategy Blocks 500 Maximum number of Trend Log Modules 6 Maximum internal Trend Log capacity (standard) 1024 Data Security Strategy and Setpoints backed up in Flash INTERFACE Engineering Software CXpro HD ©ABB 2021 All Rights Reserved. Subject to change without notice WWW.CYLON.COM page 3 of 4 DS0128 rev 23 DIMENSIONS WIRING ©ABB 2021 All Rights Reserved. Subject to change without notice WWW.CYLON.COM page 4 of 4 DS0128 rev 23 SYSTEM ARCHITECTURE Next >