Honeywell Midas User Manual

Midas
®
Gas Detector
6-3
Table 6-1. Normal operation display and output states.
Operational
State
Relay status
4-20 mA output
(for 2ppm range)
LEDs
Backlight
Display
Classic Mode Multi Color Mode
Alarm 2 Alarm relay 1 activated
(common case)
Alarm relay 2 activated
Fault relay activated
8 mA
(proportionate to
concentration)
Green
flash
Red flash
Green
Red flash
White flash
Greater
than full
scale
Alarm relay 1 activated
Alarm relay 2 activated
Fault relay activated
21 mA
Green
flash
Red flash
Green
White flash
Yellow flash
Inhibit Alarm relay 1
de-activated
Alarm relay 2
de-activated
Fault relay activated
2 mA
Green
flash
Green Green
Low flow
rate
Alarm relay 1
de-activated
Alarm relay 2
de-activated
Fault relay activated
3 mA
Green
flash
Yellow on
Green Yellow
Low flow
fault
Alarm relay 1
de-activated
Alarm relay 2
de-activated
Fault relay de-activated
1 mA
Green
flash
Yellow
flash
Green
White flash
Yellow flash

Honeywell Midas Specifications

General

Power Supply	24 VDC
Detection Technology	Electrochemical, Infrared
Sampling Method	Diffusion
Display	LCD
Communication	Modbus RTU, 4-20mA
Operating Temperature	-20°C to +50°C
Humidity Range	0% to 95% RH (non-condensing)
Target Gas	Multiple gases
Response Time	< 30 seconds
Operating Humidity	0% to 95% RH (non-condensing)
Outputs	4-20mA
Protection Rating	IP66
Certifications	ATEX, UL, CSA
Detection Gases	Oxygen (O2), Carbon Monoxide (CO), Hydrogen Sulfide (H2S), Methane (CH4), and others