{
 "manufacturer": "Cambridge Air Solutions",
 "manufacturer_slug": "cambridge-air-solutions",
 "model": "BACnet Controller - MAU",
 "model_slug": "bacnet-controller-mau",
 "aliases": [
  "Cambridge MAU controller",
  "Cambridge BACnet Controller",
  "Cambridge heater BACnet",
  "MAU Technical Manual 4.0.3.0012"
 ],
 "equipment_type": "Make-up air heater controller",
 "applies_to": "Cambridge Air Solutions direct-fired make-up air and space heating units fitted with the optional BACnet Controller.",
 "summary": "Cambridge's BACnet Controller is a BTL-listed, programmable MS/TP controller mounted in the heater that runs the fan and burner and gives a BAS access to its points. The object list is mostly multistate values (statuses, commands, HOA, modes, alarms) and analog values (temperatures, setpoints, delays, runtimes), with four binary values for runtime/cycle-count resets. Operating mode (unit heat, make-up air, make-up air with reset, summer vent, off) is selected with the Normal and Override Mode MVs.",
 "bacnet_transport": [
  "BACnet MS/TP"
 ],
 "firmware": "4.0.3.0012",
 "default_device_instance": null,
 "access_inferred": false,
 "notes": [
  "Optional points (mode switch, filter status/pressure, supply fan output and speed) exist only on units with those options.",
  "Rows from the input/output tables point to the same MV/AV objects as the value tables; hardware terminal numbers are kept in the description.",
  "The input/output tables show binary states as 0/1 while the MV table shows the same objects as 1/2; both are kept as printed.",
  "MV-50052/50053/50054 share one mode state list in the source (merged cell).",
  "Temperatures in °F by default (MV-3006 selects IP/SI); filter pressure in in. w.c."
 ],
 "source": {
  "title": "Operating Instructions - BACnet Controller - MAU (BACnet Controller MAU Technical Manual)",
  "doc_number": "Version 4.0.3.0012",
  "revision_date": "2022-11-30",
  "url": "https://www.cambridge-eng.com/Portals/0/Operating%20Instructions%20v4_0_3_0012.pdf"
 },
 "integration": {
  "summary": "Enable the unit with MV-3011 Unit Enable Mode, choose the operating mode with MV-50052 Normal Mode (MV-50053 Override Mode for the alternate mode) and command occupancy with MV-3021 Occupancy Override or the controller's own schedule. Adjust the zone and discharge setpoints, read MV-3001 Unit Status, the burner/fan status MVs and the fault MVs, and reset faults with MV-50058. The controller runs stand-alone on its defaults (unit heater mode, 160°F discharge, 65°F zone) if the network is lost, provided a zone sensor is connected.",
  "minimum_points": [
   {
    "ref": "MV 3011",
    "name": "Unit Enable Mode",
    "why": "Shutdown / enable"
   },
   {
    "ref": "MV 3021",
    "name": "Occupancy Override",
    "why": "Occupied / unoccupied / standby from the BAS"
   },
   {
    "ref": "MV 50052",
    "name": "Normal Mode",
    "why": "Unit heat, make-up air, summer vent or off"
   },
   {
    "ref": "AV 3037",
    "name": "Discharge Air Set Point – Makeup Air Mode",
    "why": "Discharge setpoint in make-up air mode"
   },
   {
    "ref": "AV 3017",
    "name": "Occupied Zone Heating Set Point",
    "why": "Zone temp the burner heats to when occupied"
   },
   {
    "ref": "MV 50058",
    "name": "Reset Unit Fault",
    "why": "Network fault reset"
   },
   {
    "ref": "MV 3001",
    "name": "Unit Status",
    "why": "Heating / satisfied / cooling / sensor unreliable"
   },
   {
    "ref": "AV 3011",
    "name": "Effective Discharge Air Temperature",
    "why": "Supply air temp leaving the unit, °F"
   },
   {
    "ref": "MV 3018",
    "name": "Burner Status",
    "why": "Burner proven on"
   },
   {
    "ref": "MV 50056",
    "name": "Burner Fault",
    "why": "Burner alarm"
   }
  ],
  "enable": "MV-3011 Unit Enable Mode (1=Shutdown, 2=Enable). Fan and burner Hand/Off/Auto overrides are MV-50050 Supply Fan HOA and MV-11 Burner HOA; leave them in Auto (3) for normal control.",
  "heartbeat": null,
  "remote_sensors": "Network values can replace the wired sensors: AV-3038 Network Override Outdoor Air Temperature and AV-3045 Network Override Zone Temperature. MV-50064 ZN-T Remote Setpoint Enable selects no remote setpoint, hardware only, network only, or network with hardware backup. The manual gives no timeout for these.",
  "setup": [
   "MS/TP only, up to 76.8 kbaud; MAC address 4-127 (default 4), set from the local display (Controller > Network) or a MAP gateway (AV-3003).",
   "Baud rate defaults to Auto (follows the bus supervisor); the manual suggests 38400 when used with a Smart Building Hub.",
   "Device Object ID (AV-3004) must be unique; BACnet Encoding Type must match the rest of the network.",
   "Disconnect from the bus while changing network settings and cycle power afterwards.",
   "An EOL terminator is needed when the controller is at either end of the MS/TP trunk."
  ],
  "gotchas": [
   "The heating lockout (AV-3010) stops the burner whenever outdoor temperature is above it, even with a heating call.",
   "In summer vent mode with SF Bypass = No, the fan will not run if outdoor temperature is above zone temperature.",
   "Continuous Fan Operation in Occupied (MV-50065) decides whether the fan keeps running when the zone is satisfied in the reset & on/off mode.",
   "Some faults also need a reset from the local display (Commissioning > Overrides > Unit Reset) or MV-50058."
  ]
 },
 "points": [
  {
   "type": "AV",
   "instance": 3032,
   "name": "Supply Fan Output (optional)",
   "description": "Hardware point AO:2",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3039,
   "name": "Filter pressure (optional)",
   "description": "Hardware point AI:5",
   "units": "in. w.c.",
   "access": "R",
   "states": ""
  },
  {
   "type": "MV",
   "instance": 50051,
   "name": "Filter status (optional)",
   "description": "Hardware point BI:7",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Alarm"
  },
  {
   "type": "MV",
   "instance": 50055,
   "name": "Mode Switch (optional)",
   "description": "Hardware point BI:4",
   "units": "",
   "access": "R",
   "states": "0=Normal, 1=Override"
  },
  {
   "type": "BV",
   "instance": 0,
   "name": "Burner Runtime Reset",
   "description": "",
   "units": "",
   "access": "W",
   "states": "0=Off, 1=Reset"
  },
  {
   "type": "BV",
   "instance": 1,
   "name": "Burner Cycle Count Reset",
   "description": "",
   "units": "",
   "access": "W",
   "states": "0=Off, 1=Reset"
  },
  {
   "type": "BV",
   "instance": 2,
   "name": "Supply Fan Runtime Reset",
   "description": "",
   "units": "",
   "access": "W",
   "states": "0=Off, 1=Reset"
  },
  {
   "type": "BV",
   "instance": 3,
   "name": "Supply Fan Cycle Count Reset",
   "description": "",
   "units": "",
   "access": "W",
   "states": "0=Off, 1=Reset"
  },
  {
   "type": "MV",
   "instance": 11,
   "name": "Burner HOA",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=Hand, 2=Off, 3=Auto"
  },
  {
   "type": "MV",
   "instance": 1577,
   "name": "Burner Modulation Mode",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=Auto, 2=Manual"
  },
  {
   "type": "MV",
   "instance": 3001,
   "name": "Unit Status",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Heating, 2=Satisfied, 3=Cooling, 4=Temperature Unreliable"
  },
  {
   "type": "MV",
   "instance": 3006,
   "name": "Units",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=IP, 2=SI"
  },
  {
   "type": "MV",
   "instance": 3007,
   "name": "FCB Baud Rate",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=Auto, 2=1200, 3=9600, 4=19200, 5=38400, 6=76800"
  },
  {
   "type": "MV",
   "instance": 3008,
   "name": "Operating Baud Rate",
   "description": "Baud rate in use (see FCB Baud Rate states)",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "MV",
   "instance": 3009,
   "name": "PID Tuning Reset",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=Off, 2=Reset"
  },
  {
   "type": "MV",
   "instance": 3010,
   "name": "Occupancy Schedule",
   "description": "Occupancy schedule reference",
   "units": "",
   "access": "W",
   "states": ""
  },
  {
   "type": "MV",
   "instance": 3011,
   "name": "Unit Enable Mode",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=Shutdown, 2=Enable"
  },
  {
   "type": "MV",
   "instance": 3012,
   "name": "Effective Occupancy",
   "description": "",
   "units": "",
   "access": "R",
   "states": "Occupied / Unoccupied"
  },
  {
   "type": "MV",
   "instance": 3016,
   "name": "Supply Fan Status",
   "description": "Hardware point BI:2",
   "units": "",
   "access": "R",
   "states": "1=Off, 2=On"
  },
  {
   "type": "MV",
   "instance": 3017,
   "name": "Unit Reset Fault",
   "description": "Hardware point BI:3",
   "units": "",
   "access": "R",
   "states": "1=Normal, 2=Alarm"
  },
  {
   "type": "MV",
   "instance": 3018,
   "name": "Burner Status",
   "description": "Hardware point BI:1",
   "units": "",
   "access": "R",
   "states": "1=Off, 2=On"
  },
  {
   "type": "MV",
   "instance": 3019,
   "name": "Burner Command",
   "description": "Hardware point BO:4",
   "units": "",
   "access": "R",
   "states": "1=Off, 2=On"
  },
  {
   "type": "MV",
   "instance": 3020,
   "name": "Supply Fan Command",
   "description": "Hardware point BO:5",
   "units": "",
   "access": "R",
   "states": "1=Off, 2=On"
  },
  {
   "type": "MV",
   "instance": 3021,
   "name": "Occupancy Override",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=Occupied, 2=UnOccupied, 3=Bypass, 4=Standby, 5=Not Set"
  },
  {
   "type": "MV",
   "instance": 3022,
   "name": "Emergency Heat Enabled",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Inactive, 2=Active"
  },
  {
   "type": "MV",
   "instance": 50050,
   "name": "Supply Fan HOA",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=Hand, 2=Off, 3=Auto"
  },
  {
   "type": "MV",
   "instance": 50052,
   "name": "Normal Mode",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=Unit Heat, 2=Makeup Air, 3=Makeup Air w/Reset, 4=Makeup Air w/Reset & On-Off, 5=Summer Vent, 6=Off"
  },
  {
   "type": "MV",
   "instance": 50053,
   "name": "Override Mode",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=Unit Heat, 2=Makeup Air, 3=Makeup Air w/Reset, 4=Makeup Air w/Reset & On-Off, 5=Summer Vent, 6=Off"
  },
  {
   "type": "MV",
   "instance": 50054,
   "name": "Effective Mode",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Unit Heat, 2=Makeup Air, 3=Makeup Air w/Reset, 4=Makeup Air w/Reset & On-Off, 5=Summer Vent, 6=Off"
  },
  {
   "type": "MV",
   "instance": 50056,
   "name": "Burner Fault",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Normal, 2=Alarm"
  },
  {
   "type": "MV",
   "instance": 50057,
   "name": "Supply Fan Fault",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Normal, 2=Alarm"
  },
  {
   "type": "MV",
   "instance": 50058,
   "name": "Reset Unit Fault",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=Off, 2=Reset"
  },
  {
   "type": "MV",
   "instance": 50059,
   "name": "Zone Temperature Sensor Failure",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Normal, 2=Alarm"
  },
  {
   "type": "MV",
   "instance": 50060,
   "name": "Supply Air Temperature Sensor Failure",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Normal, 2=Alarm"
  },
  {
   "type": "MV",
   "instance": 50061,
   "name": "Outdoor Air Temperature Sensor Failure",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Normal, 2=Alarm"
  },
  {
   "type": "MV",
   "instance": 50062,
   "name": "DAT Low Temperature Alarm",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Normal, 2=Lockout"
  },
  {
   "type": "MV",
   "instance": 50063,
   "name": "Heater Lockout Alarm",
   "description": "",
   "units": "",
   "access": "R",
   "states": "1=Normal, 2=Lockout"
  },
  {
   "type": "MV",
   "instance": 50064,
   "name": "ZN-T Remote Setpoint Enable",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=No remote Setpoint, 2=Hardware Only, 3=Network Only, 4=Network with Hardware Backup"
  },
  {
   "type": "MV",
   "instance": 50065,
   "name": "Continuous Fan Operation in Occupied",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=No, 2=Yes"
  },
  {
   "type": "MV",
   "instance": 50066,
   "name": "SF Bypass",
   "description": "",
   "units": "",
   "access": "W",
   "states": "1=No, 2=Yes"
  },
  {
   "type": "AV",
   "instance": 130,
   "name": "Zone Low Limit + Differential",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 756,
   "name": "Discharge Air Set Point – Unit Heat Mode",
   "description": "",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 1382,
   "name": "Burner Modulation Set Point",
   "description": "",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3003,
   "name": "Device Address",
   "description": "",
   "units": "",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3004,
   "name": "Device Object ID",
   "description": "",
   "units": "",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3007,
   "name": "Zone Low Limit Set Point",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3008,
   "name": "Effective Cooling Set Point",
   "description": "",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3009,
   "name": "Effective Heating Set Point",
   "description": "",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3010,
   "name": "Heating Lockout Set Point",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3011,
   "name": "Effective Discharge Air Temperature",
   "description": "Hardware point AI:6",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3012,
   "name": "Discharge Air High Set Point",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3014,
   "name": "Discharge Air Low Set Point",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3015,
   "name": "Occupied Zone Cooling Set Point",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3016,
   "name": "Unoccupied Zone Cooling Set Point",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3017,
   "name": "Occupied Zone Heating Set Point",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3018,
   "name": "Unoccupied Zone Heating Set Point",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3019,
   "name": "Effective Outdoor Temperature",
   "description": "Hardware point AI:8",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3020,
   "name": "Effective Zone Temperature",
   "description": "Hardware point AI:9",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3026,
   "name": "Modulated Burner Control",
   "description": "Hardware point AO:1",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3029,
   "name": "Application Software Version",
   "description": "",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3030,
   "name": "Effective Discharge Air Set Point",
   "description": "",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3031,
   "name": "Supply Fan Speed (optional)",
   "description": "",
   "units": "%",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3033,
   "name": "Burner Runtime",
   "description": "",
   "units": "hours",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3034,
   "name": "Burner Cycle Count",
   "description": "",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3035,
   "name": "Supply Fan Runtime",
   "description": "",
   "units": "hours",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3036,
   "name": "Supply Fan Cycle Count",
   "description": "",
   "units": "",
   "access": "R",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3037,
   "name": "Discharge Air Set Point – Makeup Air Mode",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3038,
   "name": "Network Override Outdoor Air Temperature",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3040,
   "name": "Filter Pressure Offset",
   "description": "",
   "units": "in. w.c.",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3041,
   "name": "Fan Fault Delay",
   "description": "",
   "units": "seconds",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3042,
   "name": "Burner Fault Delay",
   "description": "",
   "units": "seconds",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3043,
   "name": "Low Temperature Cutout Setpoint",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3044,
   "name": "Low Temperature Cutout Delay",
   "description": "",
   "units": "seconds",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3045,
   "name": "Network Override Zone Temperature",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 3046,
   "name": "Zone Differential",
   "description": "",
   "units": "°F",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 7018,
   "name": "AI1 Max Value",
   "description": "",
   "units": "in. w.c.",
   "access": "W",
   "states": ""
  },
  {
   "type": "AV",
   "instance": 7019,
   "name": "AI1 Output Range High",
   "description": "",
   "units": "in. w.c.",
   "access": "W",
   "states": ""
  }
 ],
 "page": "https://easybacnet.com/bacnet-points-lists/cambridge-air-solutions/bacnet-controller-mau",
 "note": "Re-typed from the manufacturer's public documentation (see source). Point availability varies by firmware and options; verify against the live device."
}