3502EN2
48 VAC VDC TMR Digital Input Module · 32 · 48 VAC/DC · 8 points · Self-test
Lifecycle note: Retain the 3502EN2 designation, grouped-common wiring and qualification baseline. Review self-test behavior with any equipment connected in parallel to the inputs.
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3502EN2Product Condition
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Shipping via DHL Fedex or UPS etc48 VAC VDC TMR Digital Input Module · Tricon Nuclear Equipment
Triconex 3502EN2 is the exact nuclear-equipment model cross-referenced to the standard 3502E by the Tricon manufacturer. It is a 32-point, self-testing TMR digital input module for nominal 48 VAC or VDC signals, with commons arranged in groups of eight. The N2 suffix remains part of the ordered identity.
The corresponding technical table gives a recommended input range of 35–95 VAC/VDC, with DC or 47–63 Hz operation. Typical switching thresholds are 27 V on rising voltage and 14 V on falling voltage. The guaranteed worst-case thresholds and the less-than-8/15 ms input delays should be used when checking field devices and pulse duration.
Review grouped commons and any parallel monitoring equipment because the self-test can momentarily affect adjacent de-energized circuits. Preserve the installed configuration, channel allocation and qualification evidence. A technical mapping to 3502E does not authorize replacing the specified 3502EN2 with a different suffix.
| Manufacturer | Triconex |
|---|---|
| Model | 3502EN2 |
| Manufacturer cross-reference | Nuclear 3502EN2 corresponds to standard 3502E |
| Input architecture | 32 TMR inputs with self-test |
| Commoning | Groups of eight |
| Nominal input | 48 VAC or VDC |
| Recommended input range | 35–95 VAC/VDC |
| Input frequency | DC or 47–63 Hz |
| OFF-to-ON threshold | 27 V typical; 32 V worst case |
| ON-to-OFF threshold | 14 V typical; 11 V worst case |
| Input impedance | Greater than 2.9 kΩ |
| Turn-on current | 6–9 mA nominal |
| Input delays | Less than 8 ms OFF-to-ON; less than 15 ms ON-to-OFF |
| Isolation | 1000 VAC / 1500 VDC minimum |
Retain the 3502EN2 designation, grouped-common wiring and qualification baseline. Review self-test behavior with any equipment connected in parallel to the inputs.
The manufacturer nuclear-equipment table explicitly maps 3502EN2 to standard 3502E. That supports use of the corresponding technical data, but it does not remove the N2 procurement and qualification identity.
No. The documented arrangement is groups of eight. Preserve each group connection and field-source allocation in the termination drawing and receiving inspection.
The table gives 27 V typical and 32 V worst case for OFF-to-ON switching. Use the applicable worst-case threshold and wiring losses when proving a reliable energized input.
The input has hysteresis. ON-to-OFF values are 14 V typical and 11 V worst case, distinct from the rising threshold; evaluate both transitions when commissioning a slowly changing source.
The specified input delay is less than 8 ms OFF-to-ON and less than 15 ms ON-to-OFF. These are not a guarantee that arbitrarily short pulses will be captured by the full system; include scan timing and the actual signal duration.
The manual describes a typical 20 ms self-test effect on adjacent de-energized points, potentially sufficient to energize sensitive parallel equipment. Review the complete circuit and the manufacturer test description before sharing an input signal.
No. 48 VAC/VDC is the nominal identity; 35–95 VAC/VDC is the published recommended range. Keep the field design at its approved nominal supply and account for the actual source tolerance.
The 1000 VAC / 1500 VDC figures are minimum isolation ratings, not permissible field signal levels. Record operating input voltage separately so a withstand figure is never used as the sensor supply limit.
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: 3502EN2 — Sales PLC Cover & Triconex Documentation. File size is below 1 MB; verify the exact installed hardware and configuration before use.
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