Honeywell HA20 Technical Manual page 8

HA20 2-Channel Controller
1 General Description
The Honeywell Analytics HA20 2-Channel Controller is designed to
display, and control alarm event switching for two inputs. Inputs are
typically voltage or 4-20mA current from transmitters, monitors or
other analog output devices. The HA20 is equipped with a Fault and
three alarm levels per channel with features such as ON / OFF delays,
latching relays and alarm Acknowledge. A dedicated horn driver circuit
for a local audible annunciator is also standard. Two standard 5-amp
alarm relays are configurable via the "alarm voting" menu to make
relays trip based on various alarm combinations. A real-Time Clock
and Calendar are also standard. Options such as 4-20mA outputs,
discrete relays for each alarm and audible annunciators are easily
added. RS-485 (Modbus RTU) ports are also available for sending
data to PC's, PLC's, DCS's, or other Honeywell Analytics controllers.
A 128 x 64 pixel graphic LCD readout displays monitored data as bar
graphs, 30-minute trends and engineering units. System configuration
is via user friendly menus and all configuration data is retained in non-
volatile memory during power interruptions. The HA20 front panel
shown in Figure 1-1 displays the bar graph data screen. The five
button symbols below the display are magnetically activated using the
magnetic wand (supplied) without opening the enclosure. Opening
the enclosure door provides access to the "touch" keypad as shown
in Figure 1-2.
HA20 Technical Manual
A3/Fault
Figure 1-1. Front Panel
Ch1 Alarm LEDs
LCD readout contrast
adjustment
Figure 1-2. Front Panel Display (open enclosure)
1-2
HA20 Display & Alarm Controller
Two Channel
Channel 1 Channel 2
A1 A1
A2 A2
A3/Fault
Magnetic
Keypad
Alarm
Next Edit
Cal Reset
(Keypad buttons
behind door)
Power = 100-240 V~, 50/60 Hz, .45 A
or 10-30 VDC @ 3 WATTS
S/N 90-
Classified to CSA C22.2 NO. 152 for combustibles
detection. Class I, DIV.2, Groups A,B,C,D
219995
READ & UNDERSTAND MANUAL!
Piezo
Ch2 Alarm LEDs
UP DOWN NEXT EDIT RESET
SW1-SW5 are the magnetic keypad allowing operator
interface w/o opening the enclosure. Touch key access requires
opening the enclosure.