The QY22 is Mitsubishi Electric’s 16-point relay output module for the MELSEC-Q programmable controller series featuring a built-in terminal block (TTB) wiring interface — providing direct screw-terminal field wiring connections without requiring a separate FCN connector assembly or terminal block adapter, significantly reducing wiring time and eliminating the risk of connector mismating in high-density panel installations. Electrically equivalent to the QY10R relay output module in contact rating and isolation architecture, the QY22 differentiates itself through its integrated terminal block, which makes it the preferred choice for applications where frequent field wiring access, individual point labelling, and simplified maintenance disconnection are priorities. Available now at Atlantech Drives with worldwide express delivery and 12-month warranty — complete our quote form for pricing and availability.
What Is the QY22?
The QY22 is a MELSEC-Q series relay output module providing 16 relay contact outputs (Form A, normally open) rated at 2 A at 240 VAC or 24 VDC, with each contact independently isolated — identical in electrical specification to the QY10R. The defining feature of the QY22 is its integrated terminal block wiring interface: rather than the 40-pin FCN connector used by the QY10R, QX41, QY41P, and most other MELSEC-Q I/O modules, the QY22 incorporates a built-in screw-terminal block that allows field wiring to be connected and disconnected individually at each output point without tools for wire insertion or specialised connectors. This makes the QY22 particularly suited for panel builders who prefer direct terminal wiring, for retrofit projects where existing field wiring is terminated in individual conductors rather than multi-core FCN cable assemblies, and for systems where maintenance technicians must frequently disconnect individual output circuits for testing or device replacement.
Key Technical Specifications
- Model: QY22
- Output Points: 16
- Output Type: Relay contact (Form A, normally open)
- Rated Load Voltage: 240 VAC / 24 VDC maximum
- Rated Load Current: 2 A per point
- Minimum Load Current: 10 mA at 5 VDC
- Contact Isolation: Independent per point (no shared common)
- Electrical Life: 200,000 operations at rated resistive load
- Wiring Interface: Built-in terminal block (TTB) — no FCN connector required
- Output Response Time: 10 ms ON, 12 ms OFF
- Current Consumption (5 VDC internal bus): 0.16 A
- Operating Temperature: 0°C to 55°C
- Weight: Approx. 0.30 kg
Series Comparison & Selection Guide
Within the MELSEC-Q relay output module range, the QY10R and QY22 are electrically identical — both provide 16 independently isolated relay contacts rated at 2 A, 240 VAC, with 200,000-operation contact life and 10 ms response time. The sole difference is the wiring interface: the QY10R uses a 40-pin FCN connector (requiring a pre-wired connector assembly or terminal block adapter for field wiring), while the QY22 has a built-in screw-terminal block for direct field wire connection. For new panel installations where FCN cable assemblies are pre-fabricated in the workshop, the QY10R is typically more cost-effective. For field-wired installations, retrofit projects, or systems where individual output circuit disconnection during maintenance is frequent, the QY22’s built-in terminal block provides faster and more reliable wiring access. The QY22 occupies the same physical slot width as the QY10R in any MELSEC-Q base unit, so either module can be substituted without base unit changes.
Installation Advice
When wiring the QY22’s built-in terminal block, use wire ferrules (end sleeves) on all stranded conductors before insertion into the terminal block — bare stranded wire inserted directly into screw terminals can develop high-resistance joints over time due to individual strand spreading under the screw clamp, particularly in high-vibration environments. Use ferrule crimps sized for the wire cross-section (0.5–1.5 mm² is the typical range for MELSEC-Q relay output loads). Tighten terminal screws to the torque specified in the QY22 hardware manual (typically 0.5–0.6 Nm) — undertorquing causes loose connections that increase contact resistance and generate heat, while overtorquing can crack the terminal block housing or damage the wire insulation. Label each terminal clearly using a labelling system that identifies the output point number and the load circuit it controls — the QY22’s direct terminal wiring makes individual point identification during fault-finding significantly faster than FCN connector modules, but only if the terminals are clearly labelled from installation. For inductive loads (contactor coils, solenoid valves), fit RC snubber circuits or MOV suppressors across each load to protect the relay contacts and extend service life, as described in the MELSEC-Q QY22 hardware manual’s wiring guidelines.
Frequently Asked Questions
Q: Is the QY22 a direct drop-in replacement for the QY10R in an existing MELSEC-Q installation?
A: Yes, electrically and mechanically. The QY22 fits the same base unit slot as the QY10R and provides identical relay contact ratings and I/O point count. The only difference is that the QY22’s field wiring connects to its built-in terminal block rather than an FCN connector — existing FCN connector cable assemblies from the QY10R cannot be reused with the QY22, so field wiring must be reconnected individually to the QY22’s terminal block during the swap. If the FCN connector assembly is preferred, retain the QY10R; if direct terminal wiring is preferred, substitute with the QY22.
Q: Can the QY22 control 110 VAC and 230 VAC loads from the same module simultaneously?
A: Yes. Like the QY10R, the QY22’s 16 relay contacts are independently isolated with no shared common, allowing each output point to switch a different voltage or circuit type. Points controlling 110 VAC loads and points controlling 230 VAC loads can coexist on the same module without interference.
Q: What wire cross-section is recommended for the QY22’s terminal block when controlling 2 A loads?
A: For the maximum 2 A rated load current, Mitsubishi recommends a minimum wire cross-section of 0.75 mm² for the load circuit conductors. For runs longer than 10 metres, increase to 1.0 mm² to compensate for voltage drop. The terminal block accepts conductors up to 1.5 mm² with ferrule crimps — using larger conductors without ferrules is not recommended as they may not fit securely in the terminal clamp.
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