Honeywell Midas User Manual

Midas
®
Gas Detector
4-21
Diagram 4-20. Midas
®
to Touchpoint4 4-Wire Connection
touch point4
Shielded
Cable
+
-
24 VDC
Power Supply
4-20 mA
Controlled
Current Source
Internal
Power
Loads
J4
INT EXT
J5
EXT INT
11
10
9
MIDAS
Simplified Internal Schematic
2
1
-
+
touchpoint4
Simplified Internal Schematic
1
3
2
+
-
24 VDC
signal
+
-
24 VDC
External
Customer-Provided
Power Supply
RJ-45
8
7
2
3
4
5
6
1
DC
PWR
+24 V
COM
NO
NC
Relay3
Relay2
Relay1
ON
SW
OFF
11
10
9
Analog Current
Loop 4-20 mA
INT EXT
EXT INT
-supply
J5
J4
+supply
J1
NO
NC
J2
NO
NC
J3
PYROLYZER
CONNECTOR
Relay1
}
Relay2
}
Relay3
}

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