The FX2N-32ER-ES/UL is Mitsubishi Electric’s 32-point combined input and relay output extension module for the MELSEC FX2N compact PLC series with UL/cUL certification — providing 16 digital inputs and 16 relay contact outputs in a single extension unit for the FX2N right-side extension bus, the UL-listed variant of the FX2N-32ER for North American market installations requiring UL certification of all panel components. In stock at Atlantech Drives. Request your quote within 24-48 hours with worldwide shipping and 12-month warranty.
What Is the FX2N-32ER-ES/UL?
The FX2N-32ER-ES/UL is a MELSEC FX2N series combined extension I/O unit providing 16 digital input points (24 VDC sink) and 16 relay contact output points (240 VAC / 30 VDC, 2 A per contact) in a single module connecting to the FX2N base unit’s right-side extension bus. The «/UL» suffix identifies the UL/cUL listed variant, carrying UL 508 and CSA C22.2 No. 14 industrial control equipment certification — functionally identical to the standard FX2N-32ER but certified for installations in the United States and Canada where UL listing of individual panel components is required by electrical inspection authorities or customer specifications. The relay outputs’ 16 points share a single common terminal, enabling all 16 outputs to switch loads at the same voltage — appropriate for applications where all relay loads operate at the same voltage level (all 24 VDC solenoids, or all 230 VAC contactors). The 16 input points accept 24 VDC NPN-output sensors, limit switches, and push buttons via the standard FX2N sink input circuit. I/O addresses are assigned sequentially by the FX2N system at power-up based on the module’s physical position in the extension chain, without software configuration. As a discontinued FX2N-era product, the FX2N-32ER-ES/UL is available from aftermarket inventory for maintenance replacement in active FX2N systems.
Key Technical Specifications
- Model: FX2N-32ER-ES/UL
- Extension Type: Combined input and relay output
- Input Points: 16 (24 VDC sink / NPN-compatible)
- Output Points: 16 (relay contact, 2 A per point, 240 VAC / 30 VDC)
- Output Common Groups: 1 group of 16 points (single common terminal)
- Input Response Time: 10 ms standard
- Relay Life: 200,000 operations (rated load)
- Certifications: UL listed (UL 508), cUL listed (CSA C22.2 No. 14)
- Extension Bus: Right-side FX2N extension bus (cable connection)
- Power Supply: From FX2N base unit internal bus (no external supply required)
- Compatible Base Units: All FX2N base unit models
- Compatible with FX3U: Yes, via FX3U-CNV-BD extension bus conversion adapter
- Operating Temperature: 0°C to 55°C
- Dimensions (W × H × D): 90 mm × 90 mm × 87 mm
- Weight: Approx. 0.45 kg
Compatibility & System Integration
The FX2N-32ER-ES/UL is compatible with all FX2N base unit models and connects directly to the FX2N right-side extension bus via the supplied extension cable. The UL/cUL certification of the FX2N-32ER-ES/UL is relevant for the complete panel’s UL compliance — when building a control panel for a North American customer requiring UL 508A listed panel certification, all installed components including extension I/O modules must carry individual UL listing. Using the non-UL standard FX2N-32ER in a UL 508A listed panel may require field evaluation for each non-listed component, adding cost and delay — the FX2N-32ER-ES/UL’s pre-existing UL listing avoids this. For FX3U base unit upgrades where existing FX2N extension modules are to be reused, the FX2N-32ER-ES/UL is compatible with FX3U via the FX3U-CNV-BD bus conversion adapter — enabling FX2N-32ER-ES/UL extension modules to remain in service while the base unit is upgraded to FX3U. The UL listing of the FX2N-32ER-ES/UL remains valid when used with the FX3U via the CNV-BD adapter, as the module’s UL certification is independent of the connected base unit. In multi-module FX2N extension chains, the FX2N-32ER-ES/UL can coexist with other FX2N extension modules (FX2N-16EX input, FX2N-16EYR relay output, FX2N special function modules) — all connected to the FX2N bus in sequence with addresses assigned automatically.
Replacement & Upgrade Notes
The FX2N-32ER-ES/UL is discontinued from Mitsubishi production and available from aftermarket inventory. For direct maintenance replacement where the FX2N base unit is being retained and UL listing is required, the FX2N-32ER-ES/UL is the correct specification. When a direct replacement cannot be sourced and the FX2N base unit is simultaneously being replaced with FX3U, the FX3U platform provides native UL-listed extension modules (FX3U-32ER equivalent) that can replace both the FX2N base unit and the FX2N-32ER-ES/UL with current-generation hardware. For FX3U-based migration, note that the FX3U extension module range includes the FX3U-32ER (16 inputs + 16 relay outputs, equivalent function) which also carries UL/cUL listing — providing the same combined I/O function in current-generation hardware without the need for the FX3U-CNV-BD adapter required for reusing the FX2N-32ER-ES/UL with FX3U. For facilities planning migration from FX2N to iQ-F FX5U, the FX5 extension module range (FX5-16EYR/ES relay output + FX5-16EX/ES input as separate modules) provides equivalent combined I/O functionality with the FX5 platform’s enhanced processing, built-in Ethernet, and current UL listing.
Frequently Asked Questions
Q: Is the UL listing of the FX2N-32ER-ES/UL still valid for new panel builds in 2025, despite the product being discontinued?
A: The FX2N-32ER-ES/UL’s UL listing remains technically valid — the UL listing is assigned to the product model and does not expire due to production discontinuation. However, UL 508A panel builders should verify with their local authority having jurisdiction (AHJ) or UL field representative whether aftermarket-sourced units of a discontinued product retain full UL listing compliance for new panel builds. Some inspection authorities require current production for new installations — using the current-production FX3U-32ER or FX5-series equivalent eliminates this potential compliance question for new builds.
Q: Can the FX2N-32ER-ES/UL relay outputs switch both 24 VDC and 230 VAC loads if the common terminal is wired at one voltage?
A: No. The 16 relay outputs share a single common terminal — all 16 outputs must switch loads connected at the same voltage. Wiring the common terminal at 24 VDC means all 16 outputs can only switch 24 VDC loads. For applications requiring relay outputs at two different voltages (24 VDC for solenoids and 230 VAC for contactors), use two separate extension modules with independent common terminals rather than mixing voltages on the FX2N-32ER-ES/UL’s single-common 16-output group.
Q: Does the FX2N-32ER-ES/UL require any GX Works2 software configuration, or is it automatically recognised?
A: The FX2N-32ER-ES/UL is automatically recognised by the FX2N system at power-up based on its physical position in the extension chain — no GX Works2 configuration is required for the module to operate. Input and output addresses are assigned sequentially without software intervention. GX Works2 online connection to the FX2N will show the automatically assigned address range for the FX2N-32ER-ES/UL in the PLC system information display.
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