Honeywell Midas-M, Руководство пользователя

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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