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Y301-880 Serial I/O Module Specification
Contents
- Overview
- Ordering Information
- Key Features
- Technical Specifications
- Interfaces and Pinout
- Mechanical and Environmental
- Automation Rules
1. Overview
Y301-880 combines eight digital inputs and eight relay outputs in a 145 × 90 × 40 mm enclosure. It connects to PLCs and equipment controllers over Modbus RTU.
| Model | DI | DO | AI | Typical Role |
|---|---|---|---|---|
| Y301-880 | 8 | 8 (normally open) | - | Multi-zone digital automation |
Product Highlights
- Eight DI and eight normally-open relay outputs
- Independent indicators for all 16 channels plus system status
- Local automation with up to 16 local rules and output retention
2. Ordering Information
2.1 Model Configuration
Y301-880 provides 8 DI and 8 DO, with no AI or AO.
For the full code and examples, see Model Naming.
2.2 Interface Options
Specify the required interface when ordering:
| Interface | Description |
|---|---|
| RS485 | Standard version for Modbus RTU multi-drop networks |
| RS232 | Optional version for point-to-point communication |
| TTL | Optional on selected models for direct MCU integration |
2.3 SKU Matrix
| SKU | Description |
|---|---|
| Y301-880 | 8 DI + 8 DO, high-density digital I/O module |
2.4 Package Contents
Module, digital quick reference guide, and warranty card. Optional accessories include a DIN clip, USB-to-RS485 converter, 24 VDC power supply, and shielded RS485 wiring kit.
3. Key Features
- 16-point digital I/O - Eight dry/wet contact DI channels plus eight normally-open relay outputs
- High-power relays - Each channel is rated for 277 VAC / 10 A or 28 VDC / 10 A with independent normally-open
COM/NOcontact pairs - Automation engine - Up to 16 local rules covering follow, pulse, timer, logic, and schedule modes
- Scalable addressing - Software Modbus address 1-255 plus a 5-bit DIP offset for panel deployments
- Power and operating environment - 5-36 VDC input, -40 to +85 °C, hardware watchdog, Reload button, and serial communication
4. Technical Specifications
4.1 Electrical and Environmental
| Parameter | Specification |
|---|---|
| Supply voltage | 5-36 VDC |
| Supply current | Not specified for the ordered hardware |
| Operating temperature | -40 to +85 °C |
| Humidity | 5-95% RH, non-condensing |
4.2 Digital Input
| Item | Specification |
|---|---|
| Channel count | 8 |
| Type | Dry/wet contact, opto-isolated |
| Wet-contact voltage range | Obtain the limits for the supplied hardware |
| DI input current | Not specified |
| Sampling rate | 100 Hz |
| Pulse counter | 32-bit per channel |
| Debounce | 5-255 ms (default 50 ms) |
The DI sampling rate does not specify a maximum countable pulse frequency. Pulse counting also depends on debounce and pulse timing.
4.3 Digital Output
| Item | Specification |
|---|---|
| Channel count | 8 x normally-open relay contacts |
| Contact rating | 277 VAC 10 A / 28 VDC 10 A |
| Minimum switching load | Not specified |
| Relay switching time | Not specified |
| Electrical life | 100k cycles at rated load |
| Output retention | Soft reboot; power-cycle retention requires the corresponding firmware option |
4.4 Communication
| Item | Specification |
|---|---|
| Interface | RS485 (2-wire), optional RS232 or TTL |
| Protocol | Modbus RTU slave |
| Baud rate | 600-230400 bps (default 9600) |
| Slave address | 1-255 (software) + DIP offset 0-31 |
5. Interfaces and Pinout
5.1 Terminal Overview
| Group | Description |
|---|---|
| Power | V+, V- screw terminals + DC 5.5 x 2.1 mm jack |
| DIP switch | SW1-SW5 (binary address offset) |
| Reload | Hold 3-15 s to restore factory defaults |
| DI | Input COM1 for DI1-DI4; input COM2 for DI5-DI8 |
| DO | COMn / NOn for channels 1-8 (normally open; no NC terminal) |
| Communication | A/B/GND (RS485) or TX/RX/GND (RS232/TTL) |
5.2 Wiring Guidelines
- Size the supply wiring and upstream fuse for module consumption and cable capacity.
- Wire DI1-DI4 to the lower input-bank
COM1, and DI5-DI8 to lower input-bankCOM2, using the applicable input circuit. The upper relay COM terminals are separate. - DI excitation and active input signals use 5-36 VDC. See the User Manual for common-terminal arrangements.
- For relay outputs driving inductive loads, add an RC snubber for AC loads or a flyback diode for DC loads.
- For RS485, use shielded twisted pair, terminate both ends with 120 ohm resistors, and keep a common reference ground.
6. Mechanical and Environmental
| Item | Value |
|---|---|
| Dimensions | 145 x 90 x 40 mm |
| Mounting | 35 mm DIN clip or screw slots |
| Protection rating | Not specified |
| Housing material / flame rating | Not specified |
Allow access to terminals, the Reload button, and the DIN-rail clip when planning installation clearances.
7. Automation Rules
| Mode | Description |
|---|---|
| DI follow | DO mirrors one or more DI states |
| Pulse output | Configurable ON/OFF pulse width |
| Delay control | Programmable ON/OFF delay |
| Cyclic toggle | Periodic ON/OFF cycling |
| Timer/schedule | Calendar-based activation window |
| Button mode | Momentary push-button behavior |
| Logic mode | AND/OR/XOR logic combination |
- Up to 16 rules total, with up to 2 rules per DO channel
- Rules run locally without host polling
- When enabled, output retention stores the last automation state
- Manufacturer: Hunan YenGear Tech Co., Ltd.
- Address: Room 21014, Building 1, Fudi Xingguang Tiandi, Yingxin Road, Yuhua District, Changsha, Hunan, China
- Email: hi@yengear.com
- Website: www.yengear.com