{
 "manufacturer": "Siemens",
 "manufacturer_slug": "siemens",
 "model": "BACnet PTEC Unit Conditioner - Application 6648 (Fan Coil Cooling and Electric Heat or VAV Pressure Dependent with Electric Heat)",
 "model_slug": "ptec-6648-fan-coil-cooling-electric-heat",
 "short_model": "PTEC Fan Coil Electric Heat 6648",
 "aliases": [
  "PTEC 6648",
  "Application 6648",
  "App 6648",
  "550-496PA",
  "Siemens fan coil electric heat",
  "Unit Conditioner"
 ],
 "equipment_type": "Fan coil unit controller",
 "applies_to": "Fan coil units with a floating cooling valve and up to three electric heat stages, or pressure-dependent VAV boxes with a cooling damper and electric heat, on the Siemens BACnet PTEC unit conditioner controller 550-496PA.",
 "summary": "Application 6648 runs a fan coil unit with a modulating (floating) cooling valve and up to three stages of electric heat on a Siemens BACnet PTEC unit conditioner controller over BACnet MS/TP. The same application can drive the damper of a pressure-dependent terminal box with electric heat instead of a valve. The fan runs in day mode or cycles with demand.",
 "bacnet_transport": [
  "BACnet MS/TP"
 ],
 "firmware": "Newer than revision Bx40",
 "default_device_instance": null,
 "access_inferred": true,
 "notes": [
  "AI and BI objects are read-only. AO and BO objects are BACnet output objects with a priority array; the guide has no access column, so access is inferred from object type. Many AOs are calculated status values, not commands.",
  "Instances shown in braces in the guide may be unbundled at a field panel; that marking is not reproduced here.",
  "Units are given in US units (°F); the guide also lists SI factory defaults.",
  "The guide covers controllers with firmware newer than revision Bx40; older firmware has separate documentation.",
  "VLV COMD and VLV POS (AO 48/49) drive either the cooling valve or, on a pressure-dependent box, the supply damper.",
  "If a damper is controlled, the central plant must supply cool air for the box to work."
 ],
 "source": {
  "title": "BACnet PTEC Controller Unit Conditioner - Fan Coil Unit Cooling and Electric Heat or VAV Pressure Dependent with Electric Heat, Application 6648, Application Note",
  "doc_number": "140-1175",
  "revision_date": "2014-07-17",
  "url": "https://sid.siemens.com/api/khub/documents/Qj~mTFBLSVyRP_UZqG3CcQ/content"
 },
 "integration": {
  "summary": "Address the controller on the BACnet MS/TP trunk (manually or with auto addressing), then release the unit to application control. The BMS commands occupancy with DAY.NGT (BO 29) and the day setpoints, and reads room temperature, fan status, the cooling valve or damper position, heat stage status and the error status.",
  "minimum_points": [
   {
    "ref": "BO 29",
    "name": "DAY.NGT",
    "why": "DAY = occupied, NIGHT = unoccupied"
   },
   {
    "ref": "AO 6",
    "name": "DAY CLG STPT",
    "why": "Occupied cooling setpoint, °F"
   },
   {
    "ref": "AO 7",
    "name": "DAY HTG STPT",
    "why": "Occupied heating setpoint, °F"
   },
   {
    "ref": "BO 5",
    "name": "HEAT.COOL",
    "why": "Current mode: HEAT or COOL"
   },
   {
    "ref": "BO 46",
    "name": "FAN",
    "why": "Fan on/off"
   },
   {
    "ref": "AI 4",
    "name": "ROOM TEMP",
    "why": "Space temperature"
   },
   {
    "ref": "AO 49",
    "name": "VLV POS",
    "why": "Cooling valve or damper position, %"
   },
   {
    "ref": "BO 43",
    "name": "HTG STG 1",
    "why": "Electric heat stage 1 on/off"
   },
   {
    "ref": "AO 99",
    "name": "ERROR STATUS",
    "why": "Controller error code"
   }
  ],
  "enable": "Occupancy is DAY.NGT (BO 29). With a wall switch on DI 2 and WALL SWITCH (BO 18) = YES, the switch sets it; standalone with no switch the controller stays in day mode; on a network the field panel or BMS commands DAY.NGT. NGT OVRD (BO 21) shows a temporary night override from the room unit button.",
  "heartbeat": null,
  "remote_sensors": null,
  "setup": [
   "BACnet MS/TP only. CTLR ADDRESS (AO 1) holds the MS/TP address; the factory value is 255.",
   "APPLICATION (AO 2) holds the application number; the point table lists its factory default as 6691."
  ],
  "gotchas": [
   "The controller keeps all associated equipment OFF until it is released to application control (see Siemens start-up procedures).",
   "With a digital room unit (revision 26 and later), a command sent through the room unit puts the matching BACnet input Out Of Service.",
   "Loop gains, motor timing, rotation angles and setup codes are commissioning values; don't write them from the BMS routinely."
  ]
 },
 "points": [
  {
   "type": "AO",
   "instance": 1,
   "name": "CTLR ADDRESS",
   "description": "Controller MS/TP address",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 2,
   "name": "APPLICATION",
   "description": "Application number running in the controller",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 3,
   "name": "RMTMP OFFSET",
   "description": "Room temperature calibration offset",
   "units": "°F",
   "access": "C",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 4,
   "name": "ROOM TEMP",
   "description": "Room temperature from the room unit",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "BO",
   "instance": 5,
   "name": "HEAT.COOL",
   "description": "Current heating/cooling mode",
   "units": "",
   "access": "C",
   "states": "0=COOL, 1=HEAT"
  },
  {
   "type": "AO",
   "instance": 6,
   "name": "DAY CLG STPT",
   "description": "Day (occupied) cooling setpoint",
   "units": "°F",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 7,
   "name": "DAY HTG STPT",
   "description": "Day (occupied) heating setpoint",
   "units": "°F",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 8,
   "name": "NGT CLG STPT",
   "description": "Night (unoccupied) cooling setpoint",
   "units": "°F",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 9,
   "name": "NGT HTG STPT",
   "description": "Night (unoccupied) heating setpoint",
   "units": "°F",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 11,
   "name": "RM STPT MIN",
   "description": "Lowest setpoint allowed from the room unit",
   "units": "°F",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 12,
   "name": "RM STPT MAX",
   "description": "Highest setpoint allowed from the room unit",
   "units": "°F",
   "access": "C",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 13,
   "name": "RM STPT DIAL",
   "description": "Setpoint from the room unit dial or keypad",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "BO",
   "instance": 14,
   "name": "STPT DIAL",
   "description": "Use the room unit setpoint dial",
   "units": "",
   "access": "C",
   "states": "0=NO, 1=YES"
  },
  {
   "type": "AI",
   "instance": 15,
   "name": "AUX TEMP",
   "description": "Auxiliary temperature input",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "BO",
   "instance": 18,
   "name": "WALL SWITCH",
   "description": "Wall switch connected to DI 2",
   "units": "",
   "access": "C",
   "states": "0=NO, 1=YES"
  },
  {
   "type": "BI",
   "instance": 19,
   "name": "DI OVRD SW",
   "description": "Room unit night override button",
   "units": "",
   "access": "R",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "AO",
   "instance": 20,
   "name": "OVRD TIME",
   "description": "Night override duration",
   "units": "h",
   "access": "C",
   "states": ""
  },
  {
   "type": "BO",
   "instance": 21,
   "name": "NGT OVRD",
   "description": "Night override status",
   "units": "",
   "access": "C",
   "states": "0=DAY, 1=NIGHT"
  },
  {
   "type": "BI",
   "instance": 24,
   "name": "DI 2",
   "description": "Digital input 2",
   "units": "",
   "access": "R",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "BI",
   "instance": 25,
   "name": "DI 3",
   "description": "Digital input 3",
   "units": "",
   "access": "R",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "BI",
   "instance": 26,
   "name": "DI 4",
   "description": "Digital input 4",
   "units": "",
   "access": "R",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "BI",
   "instance": 27,
   "name": "DI 5",
   "description": "Digital input 5",
   "units": "",
   "access": "R",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "BI",
   "instance": 28,
   "name": "DI 6",
   "description": "Digital input 6",
   "units": "",
   "access": "R",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "BO",
   "instance": 29,
   "name": "DAY.NGT",
   "description": "Day/night (occupancy) mode",
   "units": "",
   "access": "C",
   "states": "0=DAY, 1=NIGHT"
  },
  {
   "type": "AI",
   "instance": 30,
   "name": "AI 3",
   "description": "Spare analog input 3",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 31,
   "name": "AI 4",
   "description": "Spare analog input 4",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 32,
   "name": "AOV1",
   "description": "Analog output 1 (0-10 V)",
   "units": "V",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 33,
   "name": "AOV2",
   "description": "Analog output 2 (0-10 V)",
   "units": "V",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 34,
   "name": "AOV3",
   "description": "Analog output 3 (0-10 V)",
   "units": "V",
   "access": "C",
   "states": ""
  },
  {
   "type": "BO",
   "instance": 41,
   "name": "DO 1",
   "description": "Digital output 1",
   "units": "",
   "access": "C",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "BO",
   "instance": 42,
   "name": "DO 2",
   "description": "Digital output 2",
   "units": "",
   "access": "C",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "BO",
   "instance": 43,
   "name": "HTG STG 1",
   "description": "Electric heat stage 1 output",
   "units": "",
   "access": "C",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "BO",
   "instance": 44,
   "name": "HTG STG 2",
   "description": "Electric heat stage 2 output",
   "units": "",
   "access": "C",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "BO",
   "instance": 45,
   "name": "HTG STG 3",
   "description": "Electric heat stage 3 output",
   "units": "",
   "access": "C",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "BO",
   "instance": 46,
   "name": "FAN",
   "description": "Fan command",
   "units": "",
   "access": "C",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "BO",
   "instance": 47,
   "name": "DO 7",
   "description": "Digital output 7",
   "units": "",
   "access": "C",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "AO",
   "instance": 48,
   "name": "VLV COMD",
   "description": "Cooling valve or damper command",
   "units": "%",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 49,
   "name": "VLV POS",
   "description": "Cooling valve or damper position (calculated)",
   "units": "%",
   "access": "C",
   "states": ""
  },
  {
   "type": "BO",
   "instance": 50,
   "name": "DO 8",
   "description": "Digital output 8",
   "units": "",
   "access": "C",
   "states": "0=OFF, 1=ON"
  },
  {
   "type": "AO",
   "instance": 51,
   "name": "MTR 1 TIMING",
   "description": "Motor 1 full-stroke time",
   "units": "s",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 56,
   "name": "MTR1 ROT ANG",
   "description": "Motor 1 rotation angle",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 58,
   "name": "MTR SETUP",
   "description": "Motor enable/reverse setup (additive code)",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 59,
   "name": "DO DIR. REV",
   "description": "Digital output direction reverse (additive code)",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "BO",
   "instance": 60,
   "name": "CYCLE FAN",
   "description": "Cycle the fan with demand in day mode",
   "units": "",
   "access": "C",
   "states": "0=NO, 1=YES"
  },
  {
   "type": "AO",
   "instance": 63,
   "name": "CLG P GAIN",
   "description": "Cooling loop proportional gain",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 64,
   "name": "CLG I GAIN",
   "description": "Cooling loop integral gain",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 65,
   "name": "CLG D GAIN",
   "description": "Cooling loop derivative gain",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 66,
   "name": "CLG BIAS",
   "description": "Cooling loop bias",
   "units": "%",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 67,
   "name": "HTG P GAIN",
   "description": "Heating loop proportional gain",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 68,
   "name": "HTG I GAIN",
   "description": "Heating loop integral gain",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 69,
   "name": "HTG D GAIN",
   "description": "Heating loop derivative gain",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 70,
   "name": "HTG BIAS",
   "description": "Heating loop bias",
   "units": "%",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 78,
   "name": "CTL TEMP",
   "description": "Temperature the controller is controlling to",
   "units": "°F",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 79,
   "name": "CLG LOOPOUT",
   "description": "Cooling loop output",
   "units": "%",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 80,
   "name": "HTG LOOPOUT",
   "description": "Heating loop output",
   "units": "%",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 81,
   "name": "AVG HEAT OUT",
   "description": "Average heating output",
   "units": "%",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 82,
   "name": "HTG STG MAX",
   "description": "Staged heat maximum, percent",
   "units": "%",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 83,
   "name": "HTG STG MIN",
   "description": "Staged heat minimum, percent",
   "units": "%",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 84,
   "name": "STAGE FAN",
   "description": "Valve opening that turns the fan on when cycling",
   "units": "%",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 85,
   "name": "SWITCH LIMIT",
   "description": "Loop output below which mode may switch",
   "units": "%",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 86,
   "name": "SWITCH TIME",
   "description": "Minimum time before heat/cool switchover",
   "units": "min",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 88,
   "name": "HTG STG CNT",
   "description": "Number of electric heat stages",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 89,
   "name": "HTG STG TIME",
   "description": "Electric heat cycle time",
   "units": "min",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 90,
   "name": "SWITCH DBAND",
   "description": "Temperature deadband for heat/cool switchover",
   "units": "°F",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 92,
   "name": "CTL STPT",
   "description": "Active control setpoint",
   "units": "°F",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 96,
   "name": "CAL TIMER",
   "description": "Hours between automatic calibrations",
   "units": "h",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 98,
   "name": "LOOP TIME",
   "description": "Control loop interval",
   "units": "s",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 99,
   "name": "ERROR STATUS",
   "description": "Controller error status code",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 106,
   "name": "STPT SPAN",
   "description": "Room unit setpoint adjustment span",
   "units": "°F",
   "access": "C",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 121,
   "name": "DEW POINT",
   "description": "Room dew point",
   "units": "°F",
   "access": "R",
   "states": ""
  },
  {
   "type": "AO",
   "instance": 124,
   "name": "SENSOR SEL",
   "description": "Room unit / sensor select code (additive)",
   "units": "",
   "access": "C",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 125,
   "name": "RM CO2",
   "description": "Room CO2",
   "units": "ppm",
   "access": "R",
   "states": ""
  },
  {
   "type": "AI",
   "instance": 126,
   "name": "RM RH",
   "description": "Room relative humidity",
   "units": "%",
   "access": "R",
   "states": ""
  },
  {
   "type": "BO",
   "instance": 127,
   "name": "PPCL STATE",
   "description": "PPCL program loaded or empty",
   "units": "",
   "access": "C",
   "states": "0=EMPTY, 1=LOADED"
  }
 ],
 "page": "https://easybacnet.com/bacnet-points-lists/siemens/ptec-6648-fan-coil-cooling-electric-heat",
 "note": "Re-typed from the manufacturer's public documentation (see source). Point availability varies by firmware and options; verify against the live device."
}