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

  • Allows a maximum of 160 objects to be created of any supported type in any model of controller.


  • BACnet® - MS/TP (EIA-485).


  • 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.
  • Jumper selectable 0–12 VDC or solid-state relay driver.


  • Selectable 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

  • Stores 128 samples at programmable time intervals.

Multipoint Trend Logs

  • Each Trend Log stores 128 samples of 8 points at programmable time intervals.

Runtime Report

  • Records the total On time and the total number of transitions, as well as daily transitions for every binary point.
  • A 50 sample runtime log is automatically enabled for each binary point.

System Groups

  • Allows related points to be grouped onto one display.
  • 80 points/group.


  • 7 On/Off times for each weekday or exception.


  • Days of the year designated as holidays.


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


  • For creating custom input ranges and programs lookup tables.

Custom Units

  • 8 analog engineering units.
  • 8 binary engineering units.
  • 8 multistate units with 8 states, 32-characters each.

SMART-Net Port

  • Networks up to 8 SMART devices.

64 Network In Points

32 Network Out Points

  • The total maximum number of writes and shares 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 2 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 non-volatile memory. Values and log data are stored in 3 day battery backed memory.
  • Operating System firmware easily updated at any time over the network.

Supply Voltages

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


  • 1 EIA-485 (RS-485)@ 76.8 kbps max. with auto-baud detection.
  • 2 SMART-Net ports (one RJ-11 and one 4-wire terminal block) supporting a maximum of 8 devices.

Universal Inputs

  • 12-bit A/D converter.
  • Soft selectable: 0-10 VDC, 4-20 mA, thermistor/dry contact.
  • Impedance:
    3M Ω on 0-10 VDC range
    250 Ω on 4-20 mA range
    20k Ω on thermistor range
  • Pulse counting up to 40 Hz
    (supports flow meters).
  • 24 VAC over-voltage protection.

Universal Outputs

  • 12-bit D/A converter.
  • Analog: 0-12 VDC.
  • Binary: 0/12 VDC.
  • Output power: 75 mA @ 12 VDC.
  • 24 VAC over-voltage and short protection.
  • Jumper selectable solid-state relay.

Solid-State Relay Outputs

  • Switches 24 VAC/VDC.
  • 500 mA max.

Real-time Clock (-C models)

  • Clock operation is maintained in power loss.
  • 1 year backup.
  • Replaceable Lithium coin cell BR 2032.

Memory/RTC Backup (-C models)

  • Values, Trend log and Run time log data stored for 72 hours (-C models stored for 1 year).
  • Controller database, including panel file is stored in Flash memory, 10 year retention.

Terminal Blocks

  • 12 to 30 AWG (3.31 mm² to 0.05 mm²).
  • Stranded or solid core.
  • Copper conductors only.


  • SETUP-Tool for optional local configuration.


  • 10.9 cm L x 19.1 cm W x 4.6 cm H
    (4 5/16" L x 7 1/2" W x 1 13/16" H).


  • DIN rail, or.
  • #8 clearance holes on 17.8 cm W (7" W) centerline.


  • 0.3 kg (0.7 lb.).

Ambient Limits

  • Operating: -20 ºC to 55 ºC
    (-4 ºF to 131 ºF).
  • Shipping: -40 ºC to 60 ºC
    (-40 ºF to 140 ºF).
  • Humidity: 10% to 90%
    RH non-condensing.