AI3351
32-Point 4-20 mA Analog Input Module · 32 points · 4–20 mA · 12 bit · 0.15% FS
Lifecycle note: Preserve each loop range, engineering-unit scaling and diagnostic handling. The nominal 4–20 mA range, extended operating range and absolute protection limit are different specifications.
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Triconex AI3351 is the Trident analog input module identified as 3351 in the manufacturer guide. It measures 32 commoned current inputs with a nominal 4–20 mA signal range, 2–22 mA operating range and 12-bit resolution.
The published absolute accuracy is 0.15% of full scale, based on 20 mA. Input impedance with the baseplate is 250 Ω, and the −3 dB bandwidth is 16 Hz. The three channels supply values for mid-value selection in triplicated operation.
Specify the installed baseplate and any external conditioning with the replacement. Retain loop scaling and fault-response settings, check available transmitter voltage against the input burden, and verify the complete measurement chain using approved loop test equipment.
| Manufacturer | Triconex |
|---|---|
| Model | AI3351 / manufacturer base model 3351 |
| Module type | Trident analog current input |
| Field inputs | 32, commoned |
| Nominal input signal | 4–20 mADC |
| Operating input range | 2–22 mADC |
| Resolution | 12 bits |
| Absolute accuracy | 0.15% of full scale (20 mA) |
| Input impedance with baseplate | 250 Ω |
| Current-to-voltage resistor | 100 Ω ±0.01% |
| Input bandwidth | −3 dB at 16 Hz |
| Absolute maximum input current | 50 mADC; protection limit, not measuring range |
| Absolute field-voltage limits | 33 VDC maximum; reverse −0.6 VDC |
| Diagnostic method | Force-to-value testing |
Preserve each loop range, engineering-unit scaling and diagnostic handling. The nominal 4–20 mA range, extended operating range and absolute protection limit are different specifications.
No. Resolution describes quantization. The separate absolute-accuracy specification is 0.15% of 20 mA full scale, equivalent to 30 microamps before other loop uncertainties.
No. 50 mA is an absolute maximum input-current limit. The specified operating measurement range is 2–22 mA.
Using the specified input load, 20 mA through 250 Ω produces a 5 V drop. Include wiring and other loop devices when checking transmitter compliance voltage.
The processor uses the middle of the three values. The guide describes averaging the remaining two values when operating in dual mode.
No. The manufacturer identifies specific HART baseplate arrangements such as 2354/2354A. Confirm the complete installed arrangement and its approved release.
Not directly on that assumption. RTD and thermocouple applications require the specified external conditioning arrangement, including the appropriate baseplate and termination hardware.
16 Hz is the published −3 dB point. Assess required signal dynamics against that analog response rather than assuming this module is a high-speed waveform acquisition device.
The manufacturer identifies commoned inputs. Review grounding and loop connections as an assembled system so transmitter isolation is not mistaken for individual isolation at every module point.
Send the model, complete part number, quantity, destination and nameplate photo. We will verify identification details before confirming availability and lead time.
Manufacturer PDF extract: AI3351 — Sales PLC Cover & Triconex Documentation. File size is below 1 MB; verify the exact installed hardware and configuration before use.
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