1. One-sentence pitch
The 942-M0A-2D-1G1-220S is Honeywell’s plug-in 8-channel redundant analog-input terminal block for Experion PKS C300; it swallows raw 4–20 mA signals, returns isolated digital data, and erases the need for separate barriers, marshalling racks or loop-power supplies.
2. Why it’s “Minimalist I/O”
l 3-way isolation (field ↔ system ↔ power) – no external isolators
l Back-plane redundancy built-in; no change-over relays
l Per-channel 24 V loop supply drives 2-wire transmitters directly
l Hot-swap during runtime – swap one FTA, keep the process alive
3. Certified performance
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Parameter
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Value
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Note
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Channels
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8 AI
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differential, individual A/D
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Input range
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0–22 mA
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10 % over-range readable
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Accuracy
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±0.05 % F.S.
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@ 25 °C, 36-month cal interval
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Drift
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0.002 %/°C
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–40 … +70 °C
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Isolation
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1 500 Vrms
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channel-channel-system
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Loop power
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24 V ±1 %
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25 mA max per channel
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Step response
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50 ms
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filter 10–500 ms adjustable
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Field protection
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short, reverse, surge ±1 kV
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IEC 61000-4-5
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Back-plane
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redundant RJ-45 iFAT
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switch-over <10 ms
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Power draw
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2.1 W fully loaded
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fed from 24 V back-plane
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4. Proven applications
Offshore skids: one FTA replaces eight isolators + eight fuse terminals, 3 kg weight saving
Fine chemicals: SIL1 temperature transmitters wired direct, TÜV certificate covers loop
Power auxiliaries: redundant carrier keeps AO signals bump-less, meets DL/T 774 code
5. Order & support
Ex-stock Xiamen, serial numbers verifiable on Honeywell portal.
Redundant carrier (942-D01-RX) and mounting clips available on the same PO.
What happens next?
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Your quote
You’ll get a fully customized quote to fit your unique needs.
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