SPXCDALMO1 Honeywell Sensepoint XCD Oxygen Gas Detector LM25

SPXCDALMO1 | Honeywell | Sensepoint XCD Fixed Industrial Gas Detectors

The SPXCDALMO1 is an oxygen gas detector from Honeywell. It belongs to the Sensepoint XCD series. The unit ships with an LM25 enclosure and an M20 entry. Because it measures oxygen up to 25.0% v/v, it suits many industrial safety loops. The detector auto-recognizes its sensor cartridge. Therefore, commissioning is fast and simple.

Product Short Description

• Honeywell SPXCDALMO1 oxygen detector, 0-25.0% v/v range
• LM25 enclosure, M20 entry, ATEX/IECEx certified
• 4-20 mA output with fault and inhibit levels
• Three relays: low alarm, high alarm, fault
• Modbus RTU, default ID 1, 19,200 baud

Technical Data

• Sensor type: Automatic detection by gas family (mV, EC, O2)
• Normal output: 4.0 mA to 20.0 mA
• Fault level: ≥0.0 to <1.0 mA
• Inhibit level: 2.0 mA, 4.0 mA, or 17.4 mA (O2)
• Max over-range: 22.0 mA
• Alarm Relay 1: Lower level, NO, de-energized, non-latching
• Alarm Relay 2: Higher level, NO, de-energized, non-latching
• Fault Relay: <1 mA, NO, energized, non-latching
• Deadband: On; reading shows zero inside the set band
• Password: 0000 (disabled by default)
• Display unit: °C or °F, user selectable

Warnings and Fault Codes

• W-01 Calibration needed: interval elapsed or sensor changed
• W-02 Temperature limit exceeded: press tick to clear
• W-03 Alarm setting invalid: reconfigure alarm thresholds
• W-04 Over-range warning: press tick after gas returns to normal
• W-05 Sensor switched off: clear only when no flammable gas is present
• F-01 Internal I2C failure: power cycle, then replace
• F-02 Cell failure: replace toxic sensor; cycle flammable/IR units
• F-03 Zero drift: re-zero or recalibrate
• F-04 Wrong sensor fitted: fit the correct type
• F-05 to F-10, F-12 Memory or processor faults: reset, then replace
• F-11 DAC failure: check load resistor and sink/source switch
• F-13 Supply voltage failure: check incoming supply

FAQ

• Q: Does the oxygen version use a different inhibit level?
  A: Yes. Oxygen uses 17.4 mA, not the 2.0 mA toxic default.
• Q: What does a reading under 1.0 mA mean?
  A: That is a detector fault. Check the fault relay and the display code.
• Q: How do I clear the W-04 over-range warning?
  A: Press the tick key once gas levels return to normal.
• Q: Can I use Modbus without changing defaults?
  A: Yes. ID 1, 19,200 baud, EVEN parity work out of the box.
• Q: How should I choose between toxic and oxygen versions?
  A: Match the sensor to the target gas and range. Oxygen units differ in inhibit level and relay scaling.