MACH-ProAir
BACnet® Controller

Engineered to exceed the specifications for a wide variety of Variable Air Volume (VAV) applications, the Reliable Controls® MACH-ProAir is a fully programmable BACnet Building Controller (B-BC) with numerous downloadable standard codes and flexible I/O options, all priced to meet a modest budget.

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Features

Dynamic Database

  • Shared memory allows creation of supported objects as required (up to memory max, or 128 object limit, whichever is reached first)
  • All models provide 32K of database memory and 28K of trend memory
  • Typical Object Configuration table shown below


Protocol

  • BACnet® - MS/TP (EIA-485)


Motor Control

  • Standard VAV and optimized motor control algorithms stored in firmware
  • Numerous standard application codes can be downloaded from the Reliable Controls® website
  • Optional user-programmed algorithm


Engineered Enhancements

  • Onboard End Of Line (EOL) switch with LED indication provides easy EOL configuration and visual verification
  • Remote addressing and software selectable inputs allow detailed configuration to be completed over the network
  • Robust MRAM non-volatile memory preserves trend data on power cycle
  • BACnet COV support provides optimized network sharing


Control-BASIC Programs

  • 8500 bytes programmable control strategy in a readable, BASIC-like language
  • 3200 bytes per program

Inputs

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


Outputs

  • Universal ranges
  • 0-12 VDC or TRIAC, model dependent


Variables

  • Selectable standard and custom ranges, as well as fixed or program-driven values


PID Loops

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


Single-Point Trend Logs

  • Samples created at polled, COV, or triggered intervals
  • Default 128 samples, configurable to allow trending over a longer period of time


Multipoint Trend Logs

  • Each Trend Log includes 8 points at polled or triggered intervals
  • Default 128 samples, configurable to allow trending over a longer period of time


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 optional for each binary point


System Groups

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

Schedules

  • 7 On/Off times for each weekday or exception


Calendars

  • Days of the year designated as holidays


Arrays

  • Up to 128 elements in a one-dimensional array


Tables

  • For creating custom input ranges and Control-BASIC 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 4 SMART-Sensors


32 Network In Points


16 Network Out Points

  • The total maximum number of writes and shares to other devices


Warranty

  • 5 years


Certification

Typical Object Configuration

There are physical limitations to the number of inputs, outputs, and SMART-Sensors that can be connected to a MACH-ProAir. For other object types, there are no imposed limits for the maximum number of objects of a single type. The main constraint for created objects is onboard memory, however, the total number of objects that can be created (including inputs, outputs, and SMART-Sensors) is limited to 128. The table below details a typical database that fits in the memory module for any model.

Variables Loops Schedules Calendars Tables* Groups Multipoint
Trend**
Runtime* Arrays Program SMART-Sensor***
48 4 2 1 2 2 2 32 2 8 4


* Tables and Runtime Logs are not counted in the 128 object limit. Inputs, outputs, and the device object are counted in the 128 object limit.

** Trends are configured to store 128 samples.
*** All models accommodate a maximum of 4 SMART-Sensors.

BTL Listed Device

Tech Specs

Processor & Memory

  • 66 MHz, high-performance, 32-bit embedded microcontroller with onboard Flash memory
  • Controller database, values, log data, and configuration held in robust non-volatile memory
  • Operating System firmware easily updated at any time over the network


Supply Voltages

  • 24 VAC ±10% 32 VA max. 50/60 Hz
  • 24 VDC ±10% 12 W max.
    Note: MPA-12 and MPA-111 require 24 VAC only to support internal power to TRIACs


Communications

  • MS/TP
    • EIA-485 @ 76.8 Kbps max.
    • Auto-baud detection
  • SMART-Net
    • 4 SMART-Sensors max.
    • RJ-11 port on all models
    • 4 wire terminal connector on all models


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

  • 10-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


TRIAC Outputs

  • 24 VAC @ 0.5 A

SETUP-Tool

  • SETUP-Tool optional for MS/TP configuration


Dimensions

  • With actuator:
    22.7 cm L x 10.1 cm W x 7.7 cm H
    (8 15/16" L x 3 15/16" W x 3" H)
  • Without actuator:
    19.9 cm L x 10.1 cm W x 7.3 cm H
    (7 13/16" L x 3 15/16" W x 2 7/8" H)
  • With MPA-C:
    22.7 cm L x 15.0 cm W x 7.7 cm H
    (8 15/16" L x 5 7/8" W x 3" H)


Mounting

  • Supplied with #8 screw
  • Compatible with 3/8" to 1/2" damper blade shaft


Weight

  • 0.7 kg (1.8 lb.)


Ambient Limits

  • Operating: 0 ºC to 50 ºC (32 ºF to 122 ºF)
  • Shipping: -40 ºC to 60 ºC (-40 ºF to 140 ºF)
  • Humidity: 10% to 90% RH non-condensing


Velocity Sensor

  • ±0-500 Pa (0-2" WC)
  • Maximum zero point accuracy 0.1 Pa (0.0008" WC)
  • Resolution: 0.122 Pa (0.0005" WC)
  • Span accuracy 3% of reading


Actuator

  • Torque 45 in-lb (5 Nm)
  • Brushless D.C.


Flow Sensor

  • 5.2mm OD barbed fittings
  • Suitable for 1/4" standard pneumatic control tubing


Enclosure

  • ABS
  • UL94-5V

 

 

Application Diagram