Description
The Mitsubishi QY42P is a high-density DC digital output module for the Mitsubishi MELSEC-Q Series PLC rack. It provides 64 discrete transistor (NPN / Sink type) output points in a single-width (27 mm) module, switching 12/24 V DC load voltage with 0.1 A per point (0.2 A typical max surge) — suitable for driving indicator lamps, small relays, solenoid valves, and interfacing to DC-input devices.
Key characteristics vs other Q-series output modules:
- QY42P = 64 points, Transistor Sink (NPN — common +24V to load, output switches to 0V/COM), 12/24 V DC, 0.1A/pt — highest density DC output in Q lineup.
- QY41P = 32 points, Transistor Sink, 12/24 V DC, 0.1A/pt — half density.
- QY82P = 64 points, Transistor Source (PNP — output switches +24V), 12/24 V DC — if your wiring expects PNP source, choose this instead.
- QY10 / QY18A = Relay output versions (fewer points, slower, AC/DC loads).
The module connects to the Q bus and is auto-addressed in GX Works2 / GX Developer — output devices map to Y-addresses sequentially per slot (starting address set in I/O assignment — default auto).
Key Features
- Points: 64 digital outputs (occupies 4 consecutive words in device memory — Y0–Y63 in the slot’s allocated Y-area)
- Output Type: Transistor NPN (Sink / サインク出力) — load between +24V and output terminal; output goes LOW (≈0V) when ON.
- Rated Load Voltage: 12–24 V DC (operating range 10.2–28.8 V DC)
- Max. Load Current: 0.1 A / point; 2.0 A / common (COM0–COM7 typically grouped 8 pts per COM — verify manual: QY42P has 8 common terminals, each serving 8 outputs → max 2A per COM)
- Response Time: OFF→ON ≤ 0.2 ms, ON→OFF ≤ 0.3 ms (typical — very fast for solid-state DC)
- Protective Functions: Over-current protection per group (some versions), surge suppressor diode on outputs
- Diagnostics: Watchdog timer monitors module health; error LED (ERR) + module RDY/ERR LEDs
- Country of Origin: Japan (Mitsubishi Electric)
Model & Variant Reference (Q Series Digital Output — DC Transistor High-Density)
Model | Points | Output Type | Load Voltage | Typical Use |
|---|---|---|---|---|
QY42P | 64 | Transistor Sink (NPN) | 12/24 V DC | Highest density DC — indicator lamps, small solenoids (sink wiring) |
QY82P | 64 | Transistor Source (PNP) | 12/24 V DC | Same density — if load wired between output & 0V (source type) |
QY41P | 32 | Transistor Sink (NPN) | 12/24 V DC | Half density — when 64 pts not needed |
QY10 | 16 | Relay NO (Dry Contact) | 24–240 V AC / 24 V DC | AC loads or isolated switching — slower (10 ms) |
QY18A | 16 | Transistor Sink + Relay mix? (Check — QY18A = 8 transistor + 8 relay typically) | Mixed | Special app — mixed load types |
⚠️ Critical Wiring & Selection Notes:
Technical Specifications (QY42P — 64 pt DC Transistor Sink Output, 12/24 V DC, 0.1A/pt)
Parameter | Specification |
|---|---|
Model / Order Code | QY42P (Mitsubishi MELSEC-Q Series Digital Output Module) |
Output Points | 64 (occupies 4 consecutive device words in Y-area) |
Output Type | Transistor NPN (Sink type — outputs switch to 0V when ON) |
Rated Load Voltage | 12–24 V DC (operating range 10.2–28.8 V DC) |
Max. Load Current | 0.1 A / point; 2.0 A / common terminal (8 pts per COM); Total module max (check manual — typ. 16A if all COMs paralleled respecting per-COM limit) |
OFF Leakage Current | ≤ 0.1 mA |
Residual Voltage (ON) | ≤ 1.5 V DC (typical at rated load) |
Response Time (Typ.) | Turn-ON ≤ 0.2 ms; Turn-OFF ≤ 0.3 ms (resistive load) |
Fuse | No user-replaceable fuse — electronic overcurrent protection per group |
External Power Required | Yes — 12/24 V DC external supply (module does NOT generate output power — external DC supply connected to COM terminals) |
Common Terminals | 8 × COM (COM0–COM7) — each for 8 outputs (Y0–Y7→COM0, Y10–Y17→COM1 … Y70–Y77→COM7 in octal notation) |
Isolation (Output ↔ Bus) | Photocoupler isolated |
Mounting | Q Series base unit (any I/O slot — right of CPU / power supply / left-to-right daisy) |
Dimensions (W×H×D) | 27.4 mm (W) × 98 mm (H) × 95 mm (D) — standard Q single-width module |
Weight | ~ 0.18 kg |
Operating Temp. | 0 … +55 °C (no freezing/dewing) |
Standards | CE, UL, cUL, KC, RoHS |
Software | GX Developer / GX Works2 / GX Works3 (QnU CPU) |
Warranty & After-Sales
- Factory new units: 12 months warranty
- Refurbished units: 3-6 months warranty (output latch test — verify each Y point can sink load via test LED + resistor)
- Technical support for:
- NPN (Sink) vs PNP (Source) wiring confirmation (QY42P = NPN sink → +24V to load + side, other side to Y□, COM to 0V)
- COM terminal grouping explanation (8 COMs, 8 pts each — ALL COMs tie to 0V for NPN)
- Current de-rating / grouping limit (2A/COM max — load calc example)
- GX Works2 I/O assignment (starting Y address, 64-pt = 4 words — avoid overlap)
- Flyback diode recommendation for inductive DC loads
- Cross-ref to QY82P (PNP Source 64pt) if wiring mismatch discovered
- Optional external flyback diodes, DC supply sizing consult
Delivery Time
- Standard delivery: 3-5 working days (stock items)
- Express shipping available upon request
Why Choose Our Store
- Genuine Mitsubishi MELSEC-Q modules — not gray-market with weak optocouplers
- Global supply network with competitive pricing
- Expertise in Q-series I/O configuration (I/O table, Y-addressing, sink/source wiring)
- Comprehensive technical documentation (COM terminal layout, GX Works2 I/O assign screenshot, load calc example)
- Responsive customer service and support
Applications
- Indicator / Annunciator Panels: Drive 64 pilot lamps directly (low current — well within 0.1A/pt).
- Small Solenoid Valves: 12/24 V DC solenoids ≤ 0.1A coil (typical 24V DC solenoid valve ~ 0.03–0.08A hold) — for packaging/filling lines.
- Interposing Relay Coils: Drive 24 V DC relay coils (with flyback diode) — isolate higher-power AC loads.
- PLC → HMI / Slave Device Trigger: Send discrete ready/cycle-done signals to downstream equipment.
- High-Density Retrofit: Replace two 32-pt modules with one QY42P — frees one slot in Q-base for added analog or comms module.
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