Honeywell Midas User Manual

Midas
®
Gas Detector
4-9
If Power over Ethernet (PoE) is used to power
the device, then 24 VDC power must not also be
connected to the device, (or conversely if 24 VDC
is used to power the Midas
®
, then electrical power
via the Ethernet port must not be applied). Failure
to observe this requirement may cause damage to
the gas detection system and will not be covered
by the standard warranty.
When connecting the wires ensure that the power
switch is in the off position.
Diagram 4-5 shows the terminal module layout
and terminal identification as well as the jumper
locations.
Note: Earthing Requirements
If the Midas
®
unit’s metal chassis is not
connected directly to a metal surface for
earthing purposes, an additional earth wire
will be required. Connect a wire via the
PG16 gland to the dedicated earth tag (screw
terminal) located on the bottom bracket
and connect the other end of the wire to a
dedicated external earthing point.
If Power over Ethernet (PoE) power supply
is being used, shielded CAT5 Ethernet cable
is recommended.
Please ensure that your wiring avoids earth
ground loops that may aect the performance
of your equipment

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