• HA71 in NEMA 4X enclosure, 8 channel, standard configuration

    HA71 in NEMA 4X enclosure, 8 channel, standard configuration

  • HA71 in NEMA 4X enclosure, 16 channel, standard configuration

    HA71 in NEMA 4X enclosure, 16 channel, standard configuration

  • HA71 Panel mount rack incl bezel/rack hardware and magnetic keypad for non-intrusive control

    HA71 Panel mount rack incl bezel/rack hardware and magnetic keypad for non-intrusive control


Honeywell HA71

The Honeywell HA-71 has a simultaneous display and alarm functions for up to 16 input variables, and can expand with 10 additional HA71 units to provide up to 160 points of gas detection.

A graphic LCD displays monitored data as trends, bar graphs and engineering units. Three adjustable alarm levels are provided per channel. Relay outputs allow control of beacons horns and other alarm events. A horn relay may be set for steady or pulsing operation. Nonvolatile memory retains all configuration data indefinitely.

Analog inputs may be accepted and conditioned via sensor specific analog input cards. Alternatively, the standard Modbus Master port allows input data to be retrieved from Modbus slave devices including the many Modbus compatible Honeywell Analytics sensor transmitter products.

The HA71 is easy to configure and user friendly. Measurement ranges in engineering units, adjustable alarm set-points, dual serial interfaces and many other features combine to allow the HA71 satisfy the needs of many demanding applications. It is widely used for centralizing the display and alarm processing functions in critical multipoint monitoring applications. The optional HA-71-HMI (Human Machine Interface) software provides complete data display and storage, with real-time channel data available in 24-hour or 15-minute trends, including historical alarm and maintenance data.

A RS-485 Modbus slave port allows up to 128 HA71’s to be multidropped onto a single data highway for interrogation by another Modbus master. HA71’s may also be cascaded by connecting one unit’s master port to another’s slave port and others are added by connecting appropriate 8 channel boards (2 required for more than 8 channels) to the economical I2C expansion bus. Familiar “telephone style” cables and connectors interface to this bus. This method allows versatile system configuration of options satisfying the most unusual user applications.

HA71 facilitates monitoring of ambient gas detection, rotating machinery, tank levels, flow, temperature and other controls.
• Trouble-free operation--menu driven easy calibration, no moving parts

• Improved drift and temperature compensation

• Accepts inputs from up to 16 4-20mA sensors transmitters.

• CSA certified to C22.2 NO. 152 for combustible detection and Class I, Div. 2, Groups A,B,C,D CE

• Touch & magnetic keypad for nonintrusive operation in potentially hazardous locations

• NEMA 4X (Div. 2 certified) and Explosion-Proof wall mount packaging options available

• 3 independent alarm levels per channel. Relay Acknowledge feature allows silencing of external audible devices during existing alarm conditions

• Graphic LCD readout displays monitored data as bar graphs, trends and engineering units

• Cal Mode offers pushbutton zero / span calibration for direct sensor interface applications. Authorization Mode allows locking of critical configuration variables
General Specifications
UseWall or rack/panel mountable digital gas controller for industrial or commercial use
Size15 1/8” (H) x 13 1/7” (L) x 9 1/16” (D)
Weight17 lbs. (wallmount enclosure)
7 lbs. (rackmount enclosure)
Power Requirement10-30VDC (24VDC nominal)
12 watts max
Analog Inputs (optional)12 bit 4-20mA into 100 ohms input impedance; includes +power supply terminals for each channel for routing power to 2 or 3 wire transmitters
Serial PortsMaster & Slave RS-485 half or full duplex ports equipped with Tx/Rx LED’s. Protocol = Modbus RTU
Common Alarm Relays5 amp 30VDC or 250VAC resistive Form C
Discrete Alarm Relays (optional)5 amp 30VDC or 250VAC resistive Form C
Analog Outputs (optional)10 bit 4-20mA output. Max. load 800 ohms with nominal 24VDC power supply
Display128 x 240 pixel graphic LCD with backlight displays bar graphs, trends and engineering units
52 discrete LED’s indicate alarm status for 3 alarms per 16 channels and common relays
Operating Temperature Range-13°F to 140°F (-25°C to 60°C)
Housing OptionsNEMA 4X fiberglass wall mount
½ length 19 inch rack/panel mount
NEMA 7 explosion-proof wall mount
ApprovalsCSA C22.2 No. 1010.1 & 152 for combustibles & ISA S82.02
UL 1604/C22.2 No. 213 Div 2 Groups A, B, C, D
EN55011 & EN61000
Ratings and Certifications
Certified toCAN/CSA C22.2 No. 61010-1
Conforms toANSI/UL 61010-1
  • Placeholder

    100db piezo audible alarm added to NEMA 4X enclosure (except for NEMA 7 enclosures)

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    85-240 Vac universal input 150 watt 24 Vdc internal Power supply

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    Aluminum 19 expansion plate, 6 position, 7 x 19 inches; for 19 inch rack

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    Amber/red dual light stack with 80db horn; general purpose

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    Auxiliary common alarm relay board (add’l Form C relay for ALM 1, ALM 2 and HORN)

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    Dual catalytic bead LEL module (requires 10-0191)

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    Human/machine interface (HMI) software package (CD)

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    I²C analog 4-20 mA 8 output board

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    I²C analog 8 input board incl EXC terminals

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    I²C catalytic bead LEL Sensor / mA input board

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    I²C discrete alarm relay board (8, 5A Form C Relays)

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    I2C printer interface with parallel, RS-232, and RS-422 ports

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    I²C RTD / resistive / 4-20 mA 8 input board

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    NEMA 4X expansion enclosure for up to 8 option PCB’s

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    NEMA 4X expansion plate (adds up to 4 option positions)

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    NEMA 7 expansion plate

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    RS-485 to RS-232 converter (RS-485 RTU to PC DB9)

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    “Big blue” magnetic wand for XP enclosures

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    “Small red” magnetic wand for NEMA 4X enclosures

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    I²C 10 in. I/O Cable

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    I²C 6 in. I/O Cable

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    Replacement complete HA71 front panel electronic nest assembly including 10-0006 LCD

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    Replacement HA71 flat panel LCD module

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    Replacement HA71 front graphic panel