CBM Range

CBM : BACnet Plant Controller

BACnet Main Plant Controller

The CBM (BACnet Main Plant) range of controllers are ideally suitable for main plant control, including AHUs, Boilers, Rooftop Units, Lighting, etc.


  • Unique Flexibility with UniPuts™
    UniPuts - a revolutionary answer to flexible point configuration, offering maximized utilization of controller capacity along with flexibility in strategy changes. Built on a modern web-based architecture, it has a wide application scope with the flexibility of being stand-alone or network enabled.
  • Cost-effective, Low Entry Point for Building Control
    The CBM range offers reduced costs in terms of implementation, training, rollout, and maintenance. Modular, extendible packages along with low installation costs mean a low entry point for building control.
  • Highly Programmable & Extendable Via Web-enabled HVAC Technology
    The CBM range offers an advanced web-based 32-bit architecture, with advanced programmability. Built-in diagnostics, along with expanded data logging and strategy storage, is further enhanced by UniPuts, offering up to 8 Universal inputs, up to 8 UniPuts (AI/DI/AO/DO) and up to 8 UniPuts with relays.


Product Models

  CBM08 CBM12 CBM16 CBM24 CBM24k CBM24LC
UniPuts 0 0 0 8 8 8
UniPuts + Relays
Hardware connections that can be used as inputs, outputs, or relays (software selectable)
4 4 8 8 8 8
Universal Inputs
Hardware connections that can be used as analog or digital inputs (software selectable)
4 8 8 8 8 8
Controllers per Fieldbus (up to)
32 32 16 16 16 16
Strategy Blocks 1024 1024 1024 1024 1024 400
Flash-upgradable Firmware
Time-Stamped data logs for increased flexibility and longer monitoring times
32 Data logs with up to 1024 entries per catalog
Powerful diagnostics with rapid error-free commissioning technologies


Type Hitachi (Renesas) SuperH SH17034 32-bit RISC @ 20 Mhz
Operating System Memory 512k Flash
Programmable Memory System Memory 768 kb Flash & 128 kb RAM (battery backup 2 years)
Supply Requirements 24 VAC +/- 20% 50/60 Hz
Transformer Rating With UCKRA420 : 25 VA - Without UCKRA420 : 20 VA
Power / Fuse Rating 10 Watts Maximum / 1A resettable
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 50082-1
EMC Emission EN 55011 Class B
Size 5.7" x 4.7" x 2.6" (144 x 118 x 65 mm)
Enclosure & Mounting Injection-molded ABS / DIN Rail
(724) 733-2000
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