The FX5-16EYR/ES is Mitsubishi Electric’s 16-point relay contact output extension module for the MELSEC iQ-F FX5U and FX5UC compact PLC series — providing 16 additional relay contact output points (240 VAC / 30 VDC, 2 A per contact) to expand the FX5U base unit’s output capacity via the right-side extension bus, the standard relay output expansion module for FX5U systems requiring additional relay switching capability beyond the base unit’s built-in output count. In stock at Atlantech Drives. Request your quote within 24-48 hours with worldwide shipping and 12-month warranty.
What Is the FX5-16EYR/ES?
The FX5-16EYR/ES is a MELSEC iQ-F FX5 series extension I/O module providing 16 relay contact output points for expanding the output capacity of FX5U and FX5UC base units. The «16EYR» designation identifies the module as a 16-point (16) extension (E) output (Y) relay (R) type; «/ES» identifies the 200 VAC power supply category applicable to the module’s relay common supply requirement. Each of the 16 relay contact outputs provides a normally-open contact rated at 240 VAC or 30 VDC at 2 A resistive load — identical contact specification to the relay outputs on the FX5U-80MR/ES and other relay-output FX5U base units, ensuring consistent load switching performance across base unit and extension module outputs. The FX5-16EYR/ES connects to the FX5U base unit’s right-side extension bus connector via the module’s built-in edge connector, with output addresses assigned sequentially from the last output address used by the preceding module in the extension chain. Power for the relay coils within the FX5-16EYR/ES is supplied from the FX5U base unit’s internal 5 VDC and 24 VDC bus — no external power supply is required for the module itself. The FX5-16EYR/ES is also compatible with the FX5UC base unit (compact terminal block version) via the FX5-CNV-BUSC bus conversion adapter, enabling FX5UC systems to expand with FX5 series extension modules including the FX5-16EYR/ES.
Key Technical Specifications
- Model: FX5-16EYR/ES
- Extension Type: Digital relay output only
- Output Points: 16
- Output Type: Relay contact (normally open)
- Output Rating: 240 VAC / 30 VDC, 2 A per contact (resistive load)
- Output Common Groups: 2 groups of 8 points (independent common terminals per group)
- Relay Life: 200,000 operations (rated load), 10,000,000 operations (no load)
- Response Time (OFF→ON): 10 ms typical
- Extension Bus Connection: Right-side FX5 extension bus (direct plug-in)
- Power Supply: From FX5U/FX5UC internal bus (no external supply required)
- Operating Temperature: 0°C to 55°C
- Dimensions (W × H × D): 40 mm × 90 mm × 81 mm
- Weight: Approx. 0.19 kg
Compatibility & System Integration
The FX5-16EYR/ES is compatible with all FX5U base unit models (FX5U-32MR/ES, FX5U-32MT/ESS, FX5U-64MR/ES, FX5U-64MT/ESS, FX5U-80MR/ES, FX5U-80MT/ESS) and connects directly to the base unit’s right-side extension bus without any adapter. For FX5UC base units, the FX5-CNV-BUSC bus conversion adapter is required to interface the FX5UC’s proprietary compact extension bus to the standard FX5 extension bus connector used by the FX5-16EYR/ES. In the extension chain, the FX5-16EYR/ES can be cascaded with other FX5 extension modules (FX5-16EX/ES input modules, FX5-16EYT/ESS transistor output modules, FX5-C32EX/D compact input modules, FX5 special function modules) up to the FX5U platform’s maximum of 16 extension modules total. The FX5-16EYR/ES occupies 16 output (Y) device addresses in the FX5U’s device address space — addresses are assigned sequentially from the last Y address used by the base unit or preceding extension module, with no software configuration required for address assignment. For FX5U systems programmed in GX Works3, the FX5-16EYR/ES appears in the system configuration tool as an extension module with its automatically assigned Y address range — the GX Works3 system configuration display verifies correct module detection and address assignment at online connection. The FX5-16EYR/ES’s two independent relay common terminal groups (Y0–Y7 on common C1, Y10–Y17 on common C2 in octal addressing) enable the 16 outputs to switch loads at two different voltage levels simultaneously — for example, Y0–Y7 switching 24 VDC solenoid valves (common C1 at 24 VDC) and Y10–Y17 switching 230 VAC contactor coils (common C2 at 230 VAC), with complete voltage isolation between the two common groups.
Expert Tips
When specifying the FX5-16EYR/ES for high-cycle output applications (conveyor indexing solenoids, rapid pneumatic valve cycling), verify the relay contact life expectation against the application’s cycle rate — at 10 cycles per minute for a single output, 200,000 relay operations represents approximately 333 hours of continuous operation (approximately 14 days at 24/7 operation). For outputs that cycle at this rate, the FX5-16EYT/ESS transistor output extension module (unlimited electrical contact life) is a better long-term specification. Reserve the FX5-16EYR/ES relay outputs for lower-cycle functions (alarm lamps, motor contactors, batch valves) where the relay’s AC switching capability and electrical isolation are more important than contact life. For the FX5-16EYR/ES’s relay output wiring, use appropriately rated terminal ferrules (crimp-type wire end sleeves) on all output terminal connections — bare stranded wire ends in screw terminals are prone to strand splaying over time, increasing contact resistance and generating heat at the terminal. Use 0.5 mm² to 2.5 mm² ferrules matching the wire gauge for each output circuit. Monitor the FX5-16EYR/ES relay contact condition annually for high-cycle outputs by measuring the contact resistance with a low-resistance ohmmeter (4-wire Kelvin measurement) — contact resistance above 100 mΩ on a closed contact indicates contact erosion requiring module replacement planning before complete contact failure causes unexplained load switching failures.
Frequently Asked Questions
Q: Can the FX5-16EYR/ES relay outputs switch 110 VAC loads in addition to 240 VAC loads?
A: Yes. The FX5-16EYR/ES relay contacts are rated for up to 240 VAC — 110 VAC loads are within the voltage rating. Connect the 110 VAC supply to the appropriate output common terminal and wire the 110 VAC load between the output terminal and the 110 VAC neutral. Ensure all output terminal wiring is rated for the voltage level, and maintain physical separation between 110 VAC and 24 VDC wiring at the output terminal block to prevent accidental short-circuit between different voltage circuits.
Q: Does the FX5-16EYR/ES require any GX Works3 parameter configuration, or is it automatically detected?
A: The FX5-16EYR/ES is automatically detected by the FX5U system at power-up — no GX Works3 parameter settings are required for basic I/O operation. The module’s output addresses are assigned sequentially without software configuration. However, GX Works3’s system configuration verification (online > read from PLC > check system configuration) should be performed after installing any new extension module to confirm the module is correctly detected and its address range matches the GX Works3 program’s expected Y address usage.
Q: Can the FX5-16EYR/ES be used with FX3U or FX2N base units?
A: No. The FX5-16EYR/ES uses the FX5 series extension bus interface, which is physically and electrically incompatible with the FX3U and FX2N extension bus. FX3U systems use FX3U-series extension modules (FX3U-16EYR, FX3U-32ER, etc.) and FX2N systems use FX2N-series extension modules — the FX5 extension bus connector is a different physical format. FX5-16EYR/ES modules can only be used with FX5U and FX5UC base units.
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