Default Configuration
The Midas-M gas detector is factory-configured.
NOTE: Oxygen levels are 20.9% v/v in a normal atmosphere, equivalent to 17.3 mA. Use caution
when integrating an oxygen Midas-M unit using the 4-20 mA output since fault, inhibit, and no
power conditions are below 4 mA and, by default, an oxygen depletion alarm is triggered on a
falling alarm (default 19.5% v/v). In that case, Honeywell Analytics recommends one of the
following:
• Use Modbus TCP digital communications
• Use discrete relay inputs instead of a 4-20 mA signal to trigger gas alarms
• Program the control system of the 4-20 mA input with logic and a delay (e.g., 1 second) before
triggering an alarm to determine if the 4-20 mA output is at one of the 0-4 mA conditions
described above.
Contact Honeywell Analytics for further information.
Toxic Gas
flammable gas
1
oxygen
Full Scale (FS)
Typically 4 x Threshold
Limit Value (TLV)
100% Lower Explosive
Limit (LEL)
25% Volume (v/v)
Alarm 1
(Relay 1)
1/2 TLV
10% LEL
23.5% v/v (Rising)
Normally de-energized, energizes on alarm.
Alarm 2
(Relay 2)
TLV
20% LEL
19.5% v/v (Falling)
Normally de-energized, energizes on alarm.
Fault
(Relay 3)
Normally energizes, de-energized on fault.
Latching
Latching. Alarm and fault relays DO NOT automatically reset when reading
falls below alarm thresholds. Relays MUST be manually reset.
Passcode
No Passcode set.
Address
169.254.60.47 subnet mask 255.255.255.0
Current source with:
1.0 mA
Fault
2.0 mA
Inhibit
3.0 mA
Maintenance Fault
4.0 to 20.0 mA
Gas reading (normal operation)
21.0 mA
Over range
1
Not yet released
Factory Default Configuration
Midas-M
10
User Manual
Summary of Contents for Midas-M
Page 2: ......
Page 6: ......
Page 9: ...User Interface Detector s User Interface overview Midas M 9 User Manual ...
Page 16: ...Midas M 16 User Manual ...
Page 25: ...Generic example Midas M Isolated 4 20mA output w PoE power Midas M 25 User Manual ...
Page 37: ...Option Operations you can Test from the selected option l Inhibit time Midas M 37 User Manual ...
Page 55: ...3 Wait until the gas reading is stable and then click Accept Midas M 55 User Manual ...
Page 63: ...Midas M 63 User Manual ...
Page 64: ......
Page 68: ......
Page 81: ......
Page 100: ...Midas M 100 User Manual ...
Page 104: ...The certificate should be reinstalled when the IP address is changed Midas M 104 User Manual ...
Page 109: ... 2019 ...