Overview
Manuals
Signal Range
TMR Diagnostics
Termination Match
Features:
- 32 commoned analog-input points with a nominal 4–20 mA DC signal.
- Three independent channels use main-processor mid-value selection and ongoing diagnostics.
- Manufacturer data specifies 12-bit resolution and a scan below 1 ms for all 32 points.
Triconex identifies Model 3351 as a commoned 32-point analog-input module for Trident. Its three independent input channels acquire the field values separately and send them to the associated main processors, which apply mid-value selection for each scan. The guide documents continuous channel diagnostics and hot-spare support. The module is mechanically keyed for its configured baseplate; the baseplate and wiring arrangement are part of the selection.
The published module data specifies nominal 4–20 mA DC input, a 2–22 mA operating range, 12-bit resolution, 0.15% full-scale absolute error at 20 mA, 16 Hz bandwidth and less than 1 ms to scan all 32 points. Before service, confirm the nameplate, baseplate type, field-supply wiring, configured I/O address and Trident project. The 2001 guide does not establish present OEM lifecycle status or unrestricted interchangeability of hardware revisions. The reviewed 2001 Triconex Trident guide documents Model 3351 function and specifications, but does not establish current OEM lifecycle or orderability. Confirm current availability, service status and exact hardware revision in the written quotation.
The AI 3351 may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
AI 3351 English documentation and reference links.
Important Notice: Confirm the complete catalog identity, hardware revision, receiving-system configuration and required document revision before replacement.
Model 3351 provides 32 commoned analog input points. The Triconex guide specifies 4–20 mA DC nominal input and a 2–22 mA operating range. It lists 180 Ω source impedance, 250 Ω input impedance with the baseplate, and a 100 Ω ±0.01% current-to-voltage resistor. Verify transmitter limits and the exact baseplate wiring before connection.
Three independent input channels acquire values separately and transmit them to their associated main processors. The processors use mid-value selection; channel diagnostics identify a channel fault, and the guide documents hot-spare support. Record the active channel, fault indication and configured I/O address before replacement, then verify the voted value and diagnostics under the approved test procedure.
The Trident guide lists Model 2351 as the direct-termination analog-input baseplate and Model 2352 as the external-termination-panel baseplate. Confirm the installed baseplate, point wiring, dual field-power feeds, return, shield and safety connection against the cabinet drawing. The module is mechanically keyed for a configured baseplate; do not infer compatibility with other Tricon or Trident generations.
