Honeywell Midas User Manual

Midas
®
Gas Detector
A-5
Ref. Addr.
Reg. Name
Bits Function Value Enumeration
40018 FSI
0 Maintenance fault active
1 Instrument fault active
2 Flow fault active
3 Internal communication fault active
4 Pyrolyzer fault active
5 Sensor fault active
6 Range over fault active
7-15 Reserved for future expansion
40019 HST1
Concentration high scale in floating point format, scaling same as FCN1 and FCN2
40020 HST2
40071 DSN1
Detector serial number in ASCII code format, maximum 10 characters (2 characters per addresss)
Example - for serial number ABCD12345, the address values are:
Address 40071 40072 40073 40074 40075
Value 0x4142 0x4344 0x3132 0x3334 0x3500
40072 DSN2
40073 DSN3
40074 DSN4
40075 DSN5
40076 SSN1
Sensor serial number in ASCII code format, maximum 10 characters (2 characters per addresss)
Example - for serial number ABCD12345, the address values are:
Address 40071 40072 40073 40074 40075
Value 0x4142 0x4344 0x3132 0x3334 0x3500
40077 SSN2
40078 SSN3
40079 SSN4
40080 SSN5
40081 MSI
0 Warm-up (STTS nibble0 value = 0)
1 Monitor mode (STTS nibble0 value = 1, 2, 3, 4)
2 Test mode (STTS nibble0 value = 5, 6)
3 Maintenance mode (STTS nibble0 value = 7, 8)
4-15 Reserved for future expansion

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