BACzone 424

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Description

  • BACzone is an incredibly powerful variable air volume box controller. It is entirely programmable and offers 10 physical control points that are completely free for all uses (4 analog inputs, 2 analog outputs, 4 binary triac outputs).
  • For improved control, BACzone is equipped with an advanced technology velocity transmitter that scales two combined readings. The controller provides a very rapid response to changes at low flow levels, where most applications for this type of controller are used.
  • BACzone accepts Tzone digital temperature sensors, a STRATO Automation product it is compatible with on the standard 485 network protocol (up to 4 Tzones per BACzone).

Features

  • Maintenance-free high-precision hot wire velocity transmitter
    New dust segregation technology
  • Easy installation, rigid box with an intuitive and technical design on the surface.
  • Very flexible: Wholly programmable and available with a floating (on-off) or modulating actuator.
  • Manual override switches on every output (binary and analog).
  • Tilt switch for manual override of the actuator.
  • LED indicators on every binary output and every manual override switch.
  • Mini USB port to configure initial controller parameters.
  • Program-activated buzzer available (80 db)
    (useful for identifying or locating the controller, for example).
  • Removable connector clamps.

Application

The controller fulfils all requirements for VAV (variable air volume) applications such as:

  • Cooling VAV boxes, with or without heating
  • Single and dual duct VAV boxes, with or without fans
  • Multiple energy efficiency applications and concepts
    (CO2 readout, motion detector, power limitation…)

Technical specifications

  • Max wire size: 16 awg. twisted pair cable
  • Supply voltage:24 VCA : ±15% 50/60 Hz Class 2
    Replaceable 2.0A fuse
    LED indicator
  • Current consumption: 5 VA + external load, 48 VA maximum
  • External inputs:
    4 universal,
    T : Thermistor 10 kΩ (type 2 or 3)
    Dry contact, 500 ms minimum (On/Off)
    V : Voltage 0 .. 10 VCC
    I : Courant 0 .. 20 mA
    Note: Analog inputs can also be used as binary outputs.
    Resolution: 12 Bits (4096 segments)
  • Velocity transmitter (internal input):
    Omron (MEMS flow sensor)
    0 .. 1’’ H2O / 0 .. 248.8 Pa
    Note: Rapid response to changes at low flow rates.
    Resolution: 12 Bits (4096 segments)
  • Tubes: 5/32” interior diameter required
  • External outputs:
    Binary
    4 binary triac outputs, 10 .. 30 VCA, 0.350 A max., “sink” or “source” with overvoltage protection (fusing resistor)
    Note : Binary outputs can also be used as pulse outputs.
    Analog
    2 analog outputs, voltage 0 .. 10 VCC linear
    Note : Analog outputs can also be used as binary outputs.
    Resolution : 12 Bits (4096 segments)
  • Internal outputs:
    Binary
    2 binary outputs for “floating” actuator (Open/ Close)
    Analog
    1 analog output for modulating actuator (0 .. 10 VCC)
  • “Floating” Belimo actuator: Model LMB24-3-T-ZSST, 45 pound-inch / 5Nm,24 VCA / CC
    Note : Sound level under 35db
  • Modulating Belimo actuator (optional):Model LMB24-SR-T, 45 pound-inch / 5Nm, 24 VCA / CC
    Note : Sound level under 35db
  • Real-time clock (RTC): Yes
  • Buzzer: yes, by programming command
  • Trend logs: Automatic on all current BACnet objects. Limited only by the storage capacity of the server.
  • Microprocessor: STM32 (ARM Cortex™ M3) 32 bits, 72 MHz
  • Memory: 512 kb Flash non volatile, 64 kb RAM
  • Number of BACnet objects: 60 maximum
    Note : Maximum capacity is relational and varies based on type(s) of objects created.
  • Tzone wall interface: Up to 4 Tzones per BACzone controller, “daisy chain” configuration on RS-485 protocol
  • Baud rate (BACnet MS/TP): 9 600, 19 200, 38 400, 76 800, 115 200
  • External port: mini USB, to use for initial configuration of the controller (Config MS/TP software)
  • Controller addressing: Addressing via DIP switch
  • Fault protection: A capacitor maintains the time in case of a power-out, for approximately 2 weeks
  • Programming: Programming in C language using BACnet Client (STRATO Automation) interface software
  • Communication protocol: BACnet MS/TP
  • Size: 122.7 mm (4.83”) X 214.33 mm (8.43”) X 63.0 mm (2.48”)
  • Storage/transport temperature: -30°C .. 50°C / -22°F .. 122°F
  • Operating temperature:: 0°C .. 50°C / 32°F .. 122°F
  • Relative humidity:: 10 .. 90 % RH
  • Weight: 744 g / 1.5 lb
  • Mounting: Installation on variable air volume box (ventilation duct)
  • Guarantee: 3 years
  • Certification: UL (CAN & EU)
    UL 916 Energy management equipement (pending)
    BTL : B-ASC, BACnet Application Specific Controller (pending)
  • Housing: Type UL94-5V, Colour black, material FR/ABS