How F-NR2-EX1 (258188) should be checked before an industrial replacement
Pepperl+Fuchs F-NR2-EX1 (258188) is a NAMUR resistor network for providing defined resistance states for a NAMUR monitored contact. The shared product montage is a category reference image rather than a photo of this exact F-NR2-EX1 (258188) variant. The table places the verified identity and useful selection data at the front; the notes below explain where a maintenance or purchasing team should confirm the installed circuit.
Technical parameters and fit
| Technical item | Verified value / selection note |
|---|---|
| Exact model | F-NR2-EX1 (258188) |
| Product role | NAMUR resistor network |
| Resistor values | 1.5 kΩ and 10 kΩ, each 0.6 W |
| Maximum rated voltage | 20 V DC |
| Connection | Screw terminals |
| Protection | IP20 |
| Variant check | Confirm the complete designation and current manufacturer documentation before replacement. |
Quick diagnostic question for F-NR2-EX1 (258188): does the installed controller see the correct signal when the field state changes? The answer should be demonstrated, not assumed from appearance.
Replacement decision
When purchasing F-NR2-EX1 (258188), Keep the EX1 suffix and the manufacturer article reference; do not replace it with an arbitrary resistor pair. Share the full model, site photos and required certificates with the supplier. Any proposed alternative should be checked against the exact connected equipment and signed off before it replaces F-NR2-EX1 (258188); a similar-looking code is a search reference, not a declared equivalent.
Installation interface
Before fitting F-NR2-EX1 (258188), Check the hazardous-area circuit design and the switching amplifier's line-fault thresholds. Inspect available cabinet or machine space, cable exit, terminals, environmental limits and nearby equipment. If an old unit has user settings, document them before removal. Confirm the latest nameplate and electrical drawing because F-NR2-EX1 (258188) variants can share an enclosure while differing in function.
On-site proof
After F-NR2-EX1 (258188) is connected, Measure resistance and prove normal, open-wire and short-circuit indications at the amplifier. Record the input condition and the controller's observed response at both ends of the useful operating range. Also check supply, diagnostics and any line-fault indication. A successful power-on indication alone does not prove that F-NR2-EX1 (258188) has the correct configuration.
Application path
In this installation, F-NR2-EX1 (258188) supports providing defined resistance states for a NAMUR monitored contact. Start at the field device or mechanical target, follow the signal through the connection and identify what the host expects. A catalog family resemblance cannot establish output polarity, scaling, hazardous-area approval or interchangeability. The complete F-NR2-EX1 (258188) code is the procurement reference, while the as-installed drawing is the acceptance reference.
Other visually related ordering codes
The following designations resemble the F-NR2-EX1 (258188) naming pattern and are collected here to help buyers locate variants. Their functions, electrical ratings, connections and approvals may differ. The exact F-NR2-EX1 (258188) technical values above must not be copied onto another suffix without checking its own datasheet.
- F-NR3-EX1
Handover note
Keep the drawing, configured settings, inspection result and purchasing record with F-NR2-EX1 (258188). Recheck the current manufacturer datasheet if the duty, mounting, network or approval changes. This closes the F-NR2-EX1 (258188) selection and commissioning review without treating related codes as interchangeable.
