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Y301-110/200/020 I/O Module Specification
| Y301-110 | Y301-200 | Y301-020 |
|---|---|---|
 | | |
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
1. Overview
The Y301-110/200/020 series are ultra-compact serial I/O modules designed for industrial automation, remote monitoring, and IoT edge deployments. Each model combines optically isolated digital inputs with relay outputs and speaks Modbus-RTU over RS485 (RS232/TTL optional), enabling seamless integration with PLCs, SCADA systems, and cloud data loggers.
| Model | Digital Inputs (DI) | Digital Outputs (DO) | Typical Use Case |
|---|---|---|---|
| Y301-110 | 1 | 1 | Local alarm input + actuator control |
| Y301-200 | 2 | 0 | Dual-channel status monitoring |
| Y301-020 | 0 | 2 | Dual relay control for pumps/valves |
Product Positioning
- Compact DIN-rail/flat-mount form factor for dense cabinets
- Industrial-grade 5~36V DC input with reverse polarity protection
- Fits edge gateways, OEM machines, smart building nodes, and system integrators seeking modular I/O expansion
2. Ordering Information
2.1 Model Naming Convention
Y301-XYZ-IF
- XYZ: Functional combination (110 = 1DI+1DO, 200 = 2DI, 020 = 2DO)
- IF: Communication interface (default RS485, optional RS232 / TTL)
2.2 Ordering Table
| SKU | Interface | Description |
|---|---|---|
| Y301-110-RS485 | RS485 | 1DI + 1DO, Modbus-RTU |
| Y301-110-RS232 | RS232 | 1DI + 1DO, Modbus-RTU |
| Y301-110-TTL | TTL | 1DI + 1DO, direct MCU integration |
| Y301-200-RS485 | RS485 | 2DI monitor module |
| Y301-020-RS485 | RS485 | 2DO relay control module |
2.3 Standard Package Contents
- Y301 module (selected SKU)
- Quick reference card (digital download QR)
- Warranty & safety leaflet
2.4 Optional Accessories
- USB-to-RS485 converter (isolation optional)
- DIN rail clips and M3 screw kit
- 12V/24V DC power adapter
- Shielded RS485 twisted-pair cable (100m roll)
3. Key Features
- Industrial-Grade Electrical Design
- 5~36V DC input with reverse polarity protection
- Optical isolation on DI channels, relay isolation on DO
- Flexible Communication
- Native RS485 Modbus-RTU, optional RS232/TTL
- Wide baud rate support (600~230400 bps)
- Compact & Reliable Mechanics
- 77.4 × 22.5 × 16.2 mm flame-retardant enclosure
- DIN rail or screw mounting, IP20 protection
- Edge Analytics Ready
- DI pulse counting (rising/falling edge), configurable debounce (5–255 ms)
- Hardware watchdog to ensure unattended operation
- Wide Environmental Envelope
- -40°C to +85°C operating temperature, 5–95% RH non-condensing
Feature Constraints (Y301-110/200/020)
- No linkage rules or automation scripts: DI-driven logic must be implemented in the host controller.
- No DO state retention: Relay outputs reset to default state after power cycle.
- Software-only addressing: These models do not include DIP switches; Modbus address is configured via commands.
- Pulse counting available only on DI-equipped models: Y301-020 (pure DO) does not support DI pulse capture or debounce parameters.
4. Technical Specifications
4.1 Electrical Characteristics
| Parameter | Min | Typ | Max | Notes |
|---|---|---|---|---|
| Supply Voltage | 5V | 12V | 36V | DC input, reverse polarity protected |
| Supply Current | - | 100mA | 200mA | @12V, model dependent |
| Power Consumption | - | 1.2W | 1.8W | Full load |
4.2 Digital Inputs
| Item | Specification |
|---|---|
| Channel Count | 1 (Y301-110), 2 (Y301-200) |
| Input Type | Dry or wet contact |
| Isolation | Opto-isolated, 2.5kV impulse |
| Voltage Range | 5~36V DC (wet mode) |
| Input Current | <5mA/channel |
| Sampling Rate | 100Hz |
| Pulse Counter | Rising/falling edge selectable |
| Debounce | 5–255ms configurable, default 50ms |
4.3 Digital Outputs
| Item | Specification |
|---|---|
| Channel Count | 1 (Y301-110), 2 (Y301-020) |
| Type | Relay, SPDT |
| Contact Rating | AC 125V 0.5A / DC 30V 2A (resistive) |
| Switching Time | <10ms |
| Mechanical Endurance | 100,000 cycles |
4.4 Communication
| Item | Specification |
|---|---|
| Interface | RS485 (2-wire), optional RS232 / TTL |
| Protocol | Modbus-RTU slave |
| Baud Rate | 600–230400 bps, default 9600 |
| Data Bits | 8 or 9 (default 8) |
| Parity | None / Odd / Even |
| Stop Bits | 1 or 2 |
| Slave Address | 1–255, default 1 |
| Max Nodes | 32 devices on RS485 bus |
4.5 Environmental & Reliability
| Parameter | Value |
|---|---|
| Operating Temperature | -40°C ~ +85°C |
| Storage Temperature | -40°C ~ +85°C |
| Humidity | 5%~95% RH, non-condensing |
| Altitude | ≤2000m |
| Vibration | 5–500Hz, 2G |
| ESD Immunity | ±4kV contact, ±8kV air |
5. Interface & Pin Description
5.1 Terminal Layout
| Terminal | Marking | Function |
|---|---|---|
| 1 | V+ | DC 5~36V positive |
| 2 | V- | DC ground |
| 3 | DI1 | Digital input 1 (optically isolated) |
| 4 | DI2 | Digital input 2 (Y301-200 only) |
| 5 | COM | DI common (COM+ / COM-) |
| 6 | NO1 | Relay normally open (channel 1) |
| 7 | COM1 | Relay common (channel 1) |
| 8 | NC1 | Relay normally closed (channel 1) |
| 9 | NO2 | Relay normally open (channel 2, Y301-020) |
| 10 | COM2 | Relay common (channel 2, Y301-020) |
| 11 | NC2 | Relay normally closed (channel 2, Y301-020) |
| 12 | A | RS485 A / RS232 TX / TTL TX |
| 13 | B | RS485 B / RS232 RX / TTL RX |
| 14 | GND | Communication ground |
| 15 | Reload | Hold 3–15 s to restore factory defaults (no DIP switch available) |
5.2 Wiring Guidance
- Power: Use 22–18 AWG wires, add 1A fuse near source.
- DI (dry contact): Bridge COM+ to DI via switch. For wet contact, feed external 5–36V signal referenced to COM-.
- DO: Relay contacts are potential-free; add snubber (RC) for AC inductive loads or flyback diode for DC loads.
- RS485: Use shielded twisted pair, terminate 120Ω at both ends for long buses.
6. Mechanical & Environmental
| Item | Specification |
|---|---|
| Dimensions | 77.4 × 22.5 × 16.2 mm |
| Weight | ≈50 g |
| Mounting | 35mm DIN rail clip / dual M3 screw holes (70mm spacing) |
| Enclosure | UL94 V-0 flame-retardant plastic |
| Ingress Protection | IP20 |
Installation Notes
- Maintain ≥20 mm clearance above/below for ventilation.
- For screw mounting, torque M3 screws to 0.5 N·m.
- Avoid routing signal cables parallel to high-voltage lines.
- 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