Operating temperature: -25°C to +50°C

Product Overview
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.  

Additional Features and Benefits:
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

HA20, HA40 & HA71 specifications
Gas Detection Controllers

HA20 and HA40 Models

General Specifications
Use Wall or rack/panel mountable digital gas controller for industrial or commercial use
Display 128 x 64 pixel graphic LCD with backlight displays, bar graphs, trends and engineering units
Common Alarm Relays (standard) Two, 5 amp 30VDC or 250VAC resistive Form C
Discrete Alarm Relays (OPTIONAL) Six 5 amp 30VDC or 250VAC resistive Form C
Analog Output (Optional) 10 bit 4-20mA output. Max load 800 ohms with nominal 24VDC power supply.
Serial Port (Optional) Slave RS-485 port equipped with Tx / Rx LED’s
Protocol = Modbus RTU
Power Requirement 100-240 VAC / 24 VDC are standard primary power supplies
Operating Temperature Range (-25 °C to +50 °C)
Housing Options NEMA 4X / IP66 wall mount approved for Div 2
 NEMA 7 explosion-proof wall mount Div 1 & 2
 NEMA 4X SS Enclosure wallmount approved for Div 2
Weight NEMA 4 = 5 pounds, NEMA 7 = 40 pounds
Warranty 2 Years Limited
HA20 & HA40 Wireless Options
Use An optional HA40 900MHz wireless interface (10-2454) can be used to communicate with an HA71 master Modbus controller.
An additional 900MHz wireless adapter is also required for the HA71 (10-0288).
Ratings and Certifications
Certified to CSA C22.2 No. 1010.1 & ISA S82.02; UL 1604 / C22.2 No 213 (NEMA 4X = Div 2 Groups A, B, C, D, NEMA 7 =
Groups B, C, D); EN55011 & EN61000.

HA71 Model

A Ordering Information

HA71 Enclosures
PART NUMBER DESCRIPTION
HA71SM* SURFACE MOUNT (AGAINST FLAT SURFACE)
HA71PM PANEL MOUNT RACK (INCLUDES BEZEL/RACK HARDWARE)
HA71N4 HA71SM IN NEMA 4X ENCLOSURE
HA71SS HA71 Stainless Steel NEMA 4X Enclosure
HA71XP HA71SM IN BOLT ON LID NEMA 7 ENCLOSURE
(INCLUDES MAGNETIC KEYPAD FOR NON-INTRUSIVE CONTROL)
*HA71SM Surface mount package is the most basic model; includes loose 10-0185 Front Panel Nest Assembly and and 10-0142 MAIN I/O board. It supports
Modbus® master and slave RS-485 I/O interfaces and has 5 amp form C relays for Alarm 1, Alarm 2, Fail and Horn alarm conditions. Analog and Discrete
I/O is available by addition of the appropriate OPTION boards interfaced to the HA71 via an I2C serial expansion bus. Factory packaging of the HA71SM
within a rack/panel mount enclosure (HA71PM), a NEMA 4X enclosure (HA71N4) and a NEMA 7 explosion-proof enclosure (HA71XP) is also available.
These package styles support addition of up to 7 I2
C option board footprints (3 w/o 10-0180 expansion kit option) inside each respective enclosure. Additional
options may be added externally or in other enclosures.
Optional Equipment (cont’d)
PART NUMBER DESCRIPTION
10-0144 AUXILIARY COMMON ALARM RELAY BOARD (ADDITIONAL FORM C RELAY FOR ALM 1, ALM 2 & HORN)
10-0158 I2
C ANALOG 8 INPUT BOARD INCLUDING EXC TERMINALS
10-0167 I2
C ANALOG 4-20mA 8 OUTPUT BOARD
10-0195 I2
C DISCRETE ALARM RELAY BOARD (8, 5A FORM C RELAYS)
10-0191 I2
C CATALYTIC BEAD LEL SENSOR / mA INPUT BOARD
10-0192 DUAL CATALYTIC BEAD LEL MODULE (REQUIRES 10-0191)
10-0170 I2
C RTD / RESISTIVE / 4-20mA 8 INPUT BOARD
10-0178 NEMA 4X EXPANSION ENCLOSURE FOR UP TO 8 OPTION PCB’s
10-0180 NEMA 4X EXPANSION PLATE (ADDS UP TO 4 OPTION POSITIONS)
10-0172 85-240VAC UNIVERSAL INPUT 150 WATT 24VDC POWER SUPPLY
10-0208 FULL WIDTH 19” RACK (SUPPORTS 1 or 2 HA71SM’s) 

Optional Equipment (cont’d)
PART NUMBER DESCRIPTION
10-0229 I2
C PRINTER INTERFACE WITH PARALLEL, RS-232, & RS-422 PORTS
10-0177 RS-485 TO RS-232 CONVERTER (RS-485 RTU TO PC DB9)
1000-1892 100db PIEZO AUDIBLE ALARM ADDED TO NEMA 4X ENCLOSURE
1000-1906 AMBER/RED DUAL LIGHT STACK w/ 80db HORN; GENERAL PURPOSE
Spare Parts
PART NUMBER DESCRIPTION
10-0142 Replacement Main I/O PCB for HA71/XP
10-0213 Replacement Main I/O PCB for HA71PM (ribbon connector on circuit side of PCB)
10-0006 Replacement HA71 Flat Panel LCD Module
10-0185 Replacement Complete HA71 Front Panel Electronic Nest Assembly Including 10-0006 LCD
10-0231 Replacement HA71 Front Graphic Panel
1000-1992 Replacement Main I/O PCB Fuse; 20mm / 2 amp
0010-1110 I2
C 6 Inch I/O Cable
0010-1180 I2
C 10 Inch I/O Cable
0010-1188 I2
C 6 foot I/O Cable
1000-0078 “Big Blue” Magnetic Wand for XP Enclosures
1000-0076 “Small Red” Magnetic Wand for NEMA 4X Enclosures