BACnet® Controller

Small, durable and packed with flexibility, the Reliable Controls® MACH-ProZone is a fully programmable BACnet® Building Controller (B-BC) with highly scalable I/O in a very small footprint. The MACH-ProZone is ideal for a wide range of applications that include small to mid-sized roof top and heat pump applications, and small mechanical room applications. The controller features up to 8 universal inputs and up to 8 universal outputs with jumper selectable relay configuration. The MACH-ProZone ships standard with removable terminal blocks and support for 8 SMART devices.

Purchase Products

Product features

Dynamic Database

  • Create up to 160 objects of any supported type in any model of controller.
  • Maximum of 128 objects of a single type.
  • Refer to the Typical Object Configuration table below for memory usage.


  • BACnet MS/TP.


  •  16,000 bytes of programmable control strategy in a readable, BASIC-like language.
  •  3,200 bytes per program.


  •  Universal ranges.
  •  Soft selectable 0–10 VDC, 4–20 mA, thermistor/dry contact.


  •  Universal ranges.
  •  Use jumper to select as 0–12 VDC or solid-state relay driver.


  • Select standard and custom ranges as well as fixed or program-driven values.


  • Standard P, PI, or PID controllers for closed loop control.

Single-point Trend Logs

  •  Record values at user-defined intervals or based on change of value.
  • Dynamic; user assigned.

Multipoint Trend Logs

  •  Store up to eight objects in each trend log.
  • Record values at user-defined intervals.
  • Dynamic; user assigned.

Runtime Report

  •  Total on time and record the on/off times of every binary object.
  • Automatically generated.

System Groups

  •  Group related objects on one display.
  •  80 unique objects per group.


  • Seven on/off times for each weekday or exception.


  • Designate days of the year as holidays.


  • Up to 128 elements in a one-dimensional array.


  • For creating custom scaling functions.

Custom Units

  •  Eight analog engineering units.
  •  Eight binary engineering units.
  •  Eight multistate units with eight states, 32 characters each.

SMART-Net Port

  • Network up to eight SMART-Net devices.

64 Net Ins

  • The maximum number of shares from other devices.

32 Net Outs

  • The maximum number of writes to other devices.


  • 5 years.

Typical Object Configuration
There are physical limitations to the number of inputs, outputs, and SMART-Sensors that can be connected to a MACH-ProZone controller. For other object types, a maximum number of 128 objects of a single type can be created. The total number of objects (including inputs, outputs, and SMART-Sensors) is limited to 160, and is also limited by the onboard memory. The table below details typical databases that fit in all models.

Memory Variables Loops Schedules Calendars Tables* Groups Multipoint Trend** Runtime* Arrays Program SMART-Sensor
MPZ-88 64 8 4 2 4 4 10 128 4 16 4

* Runtime Reports and Tables are not counted in the 160 object limit. Inputs and outputs are counted in the 160 object limit.
** Trends are configured to store 128 samples.

RoHS 3 Certified WEEE Compliant BTL Listed Device

Technical specifications


  • 66 MHz high-performance 32-bit embedded microcontroller with onboard Flash memory.
  • Controller database stored in robust nonvolatile memory. Value and log data stored in 3-day battery-backed memory.
  • Easily update system firmware at any time over the network.

Supply Voltages

  • 24 VAC ±10% 25 VA maximum, 50/60 Hz.
  • 24 VDC ±10% 12 W maximum.

Communication Options

  • One EIA-485 (RS-485) port that supports a baud rate up to 76.8 Kbps. Auto-baud detection.
  • Two SMART-Net ports, one RJ11 and one 4-wire terminal block, that support up to eight devices.

Universal Inputs

  • 12-bit A/D converter.
  • Use software to select thermistor/dry contact, 4–20 mA, or 0–10 VDC.
  • Impedance:
    • 3 MΩ on 0–10 VDC range.
    • 250 Ω on 4–20 mA range.
    • 20 kΩ on thermistor range.
  • Pulse counting up to 40 Hz. Supports flow meters.
  • 24 VAC overvoltage protection.

Universal Outputs

  • 12-bit D/A converter.
  • Analog: 0–12 VDC.
  • Binary: Software configurable between 0–12 VDC.
  • Output power: 75 mA at 12 VDC.
  • 24 VAC overvoltage and short protection.
  • Use jumper to select solid-state relay.

Solid-State Relay Outputs

  • Switch 24 VAC/VDC.
  • 500 mA maximum.

Memory and Real-Time Clock Backup (-C Option)

  • Capacitor backup maintains clock operation for 72 hours after power loss.
  • Real-time clock accurate to ±5 seconds per month.

Terminal Blocks

  • 16–28 AWG.
  • Stranded or solid core.
  • Copper conductors only.


  • #8 clearance holes on 17.8 cm W (7" W) centerline.
  • Option to mount to DIN rail accessory.


  • 19.1 cm L x 10.9 cm W x 4.6 cm H

    (7 1/2" L x 4 5/16" W x 1 13/16" H).


  • 0.3 kg (0.7 lb).

Ambient Limits

  • Operating: -20°C to 55°C
    (-4°F to 131°F).
  • Shipping: -40°C to 60°C
    (-40°F to 140°F).
  • Humidity: 10%–90% RH noncondensing.



SMART–Net Conection

MS/TP Connection