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Y301-220/222 I/O Module Specification
| Y301-220 | Y301-222 |
|---|---|
 |  |
Document Control
| Item | Detail |
|---|---|
| Version | V1.0.0 |
| Release Date | November 2025 |
| Product Category | Serial I/O Module |
Table of Contents
- Overview
- Ordering Information
- Key Features
- Technical Specifications
- Interface & Pin Description
- Mechanical & Environmental
- Automation & Linkage Rules
1. Overview
Y301-220/222 are high-power serial I/O expansion modules that combine optically-isolated digital inputs, 10A relay outputs, and (for Y301-222) dual analog inputs supporting 0–10V or 4–20mA sensing. Both models speak Modbus-RTU over RS485/RS232/TTL and integrate easily into PLCs, SCADA systems, or remote telemetry panels.
| Model | Digital Inputs | Digital Outputs | Analog Inputs | Typical Role |
|---|---|---|---|---|
| Y301-220 | 2 | 2 × SPDT | – | Equipment monitoring + control |
| Y301-222 | 2 | 2 × SPDT | 2 (0–10V / 4–20mA) | Process monitoring + control |
Analog input capability applies to Y301-222 only.
Positioning Highlights
- 82 × 54 × 32 mm enclosure with DIN-rail and screw mounting
- AC 277V/10A relay contacts suitable for HVAC, lighting, and pump control
- Built-in automation engine with linkage rules, DO retention, and DIP-addressing
2. Ordering Information
2.1 Model Naming
Y301-22X-IF
- 22X: 220 = 2DI/2DO, 222 = 2DI/2DO + 2AI
- IF: Interface option (RS485 default, RS232 or TTL optional)
2.2 SKU Table
| SKU | Interface | Description |
|---|---|---|
| Y301-220-RS485 | RS485 | 2DI + 2DO high-power module |
| Y301-220-RS232 | RS232 | 2DI + 2DO, point-to-point |
| Y301-222-RS485 | RS485 | 2DI + 2DO + 2AI combo module |
| Y301-222-RS232 | RS232 | 2DI + 2DO + 2AI, direct PC |
2.3 Standard Package
1× Y301 module, quick reference guide (digital), warranty leaflet. Optional kits: USB-RS485 converter, DIN clips, power supplies, shielded cables.
3. Key Features
- High-Power Relay Outputs – AC 277V/10A or DC 28V/10A, silver alloy contacts.
- Opto-Isolated DI with Pulse Counting – Rising/falling edge capture, configurable debounce (5–255 ms).
- Analog Inputs (Y301-222) – Dual channels supporting 0–10V or 4–20mA, 16-bit resolution, ±1% FS accuracy.
- Automation Engine – Up to 4 linkage rules, DI follow, pulse, delay, cycle, timer, AI-threshold (222), logic modes.
- State Retention & Addressing – Configurable DO hold (soft or full), 5-bit DIP offset plus software base address.
- Robust Construction – 5–36V DC input, -40°C~85°C, hardware watchdog, reload button.
4. Technical Specifications
4.1 Electrical & Environmental
| Parameter | Spec |
|---|---|
| Supply Voltage | DC 5~36V |
| Typical Current | 150 mA @12V (all DO off) |
| Max Current | 200 mA @12V (two relays on + AI sampling) |
| Operating Temp | -40°C ~ +85°C |
| Humidity | 5~95% RH, non-condensing |
| Altitude | ≤2000 m |
4.2 Digital Inputs (2 channels)
| Item | Specification |
|---|---|
| Type | Dry / wet contact, opto-isolated |
| Voltage Range | 5~36V (wet mode) |
| Input Current | <5 mA/channel |
| Sample Rate | 100 Hz |
| Pulse Counter | 32-bit, rising/falling selectable |
| Debounce | 5–255 ms (default 50 ms) |
4.3 Digital Outputs (2 × SPDT relays)
| Item | Specification |
|---|---|
| Contact Rating | AC 277V 10A / DC 28V 10A (resistive) |
| Switching Time | <10 ms pickup / <5 ms release |
| Minimum Load | AC 10V 10 mA / DC 5V 1 mA |
| Endurance | 100k electrical cycles @ rated load |
| State Retention | None / soft reboot / power-cycle (configurable) |
4.4 Analog Inputs (Y301-222 only)
| Item | Specification |
|---|---|
| Channels | 2 |
| Modes | 0–10V or 4–20 mA selectable per channel |
| Accuracy | ±1% FS, 16-bit resolution |
| Sample Rate | 10 Hz (per channel) |
4.5 Communication
| Item | Specification |
|---|---|
| Interface | RS485 (2-wire), RS232, TTL optional |
| Protocol | Modbus-RTU slave |
| Baud Rate | 600–230400 bps (9600 default) |
| Slave Address | 1–255 (software) + DIP offset 0–31 |
| Bus Capacity | 32 nodes @ RS485 without repeaters |
5. Interface & Pin Description
5.1 Terminal Summary
| Group | Terminal | Description |
|---|---|---|
| Power | V+, V- | DC 5~36V input |
| DIP Switch | SW1–SW5 | Address offset (binary), ON = 1 |
| Reload | Button | Hold 3–15 s to restore factory defaults |
| DI | COM+, COM-, DI1, DI2 | Dry/wet input terminals |
| DO | NC1/COM1/NO1, NC2/COM2/NO2 | SPDT relay contacts |
| AI (Y301-222) | AI1-, V1+, I1+, AI2-, V2+, I2+ | Voltage/current measurement terminals |
| Communication | A, B, GND (RS485) / TX, RX, GND (RS232/TTL) | Serial interface |
5.2 Wiring Notes
- Power: Use 22–18 AWG wires, add a 1A fuse near the source.
- DI Dry Mode: Bridge COM+ to DI through a switch; module sources ~12V.
- DI Wet Mode: Feed external 5–36V signal referenced to COM-.
- DO: Use snubbers (AC) or flyback diodes (DC) for inductive loads.
- AI: Select either V+ or I+ per channel; never connect both simultaneously.
- RS485: Shielded twisted pair, 120Ω termination at both bus ends.
6. Mechanical & Environmental
| Item | Value |
|---|---|
| Dimensions | 82 × 54 × 32 mm |
| Mounting | 35 mm DIN rail or 4 × M3 screws |
| Protection | IP20 |
| Enclosure | UL94 V-0 flame-retardant plastic |
Clearance recommendation: ≥20 mm top/bottom, ≥10 mm sides, ≥50 mm front for wiring.
7. Automation & Linkage Rules
| Mode | Description |
|---|---|
| DI Follow | DO mirrors DI state instantly |
| Pulse Output | Generate configurable on/off pulse width |
| Delay Control | Start/stop with programmable delay |
| Cyclic Toggle | Periodic ON/OFF cycle |
| Timer / Daily Schedule | Calendar-based activation |
| Button Mode | Momentary pushbutton handling |
| AI Threshold (Y301-222) | DO controlled by analog value window |
| Logic Operations | AND/OR/XOR between triggers |
- Up to 4 rules per device (2 per DO channel)
- Rules execute locally without host intervention
- DO retention applies when linkage state saving is enabled
- Manufacturer: Hunan Yanji Tech Co.,Ltd
- Address: Room 21014, Unit 1, Fudixingguang plaza, Yuhua district Yingxin road, Changsha, Hunan, P.R. China
- Email: hi@yanjiiot.com
- Website: www.yanjiiot.com