Comprehensive Product Summary – Advanio W‑M2B501 RS‑485 Modbus Mini Module

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### 1. Product Overview

Product Name: 4DI/4DO RS‑485 Modbus Mini Module
Model: W‑M2B501
Series: Wolf Series – RS‑485 Remote I/O Modules
Article Number: W‑M2B501
Manufacturer: Advanio Technology Co., Ltd.

The W‑M2B501 is a compact, high‑reliability digital input/output module designed for industrial automation and remote data acquisition applications. It belongs to Advanio’s Wolf Series of RS‑485 remote I/O modules, which are engineered for rugged environments and optimized for Modbus RTU communication. The module integrates four isolated digital inputs (DI) supporting both dry and wet contact modes and four isolated NPN digital outputs (DO). It provides full Modbus RTU compatibility, hot‑swap capability, EEPROM‑based configuration backup, and programmable power‑on/safety states.

Advanio Technology Co., Ltd., headquartered in Taiwan, specializes in advanced I/O and embedded automation solutions. The company’s Wolf Series modules are designed to meet Industry 4.0 and IoT‑driven smart factory requirements, emphasizing reliability, modularity, and ease of maintenance.

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### 2. Key Features

- 4 Isolated Digital Inputs (Dry/Wet selectable): Supports both dry contact (mechanical switch) and wet contact (voltage signal) modes.
- 4 Isolated NPN Digital Outputs: Open‑collector transistor outputs for direct control of external devices.
- RS‑485 Communication Interface: Standard Modbus RTU protocol for seamless integration with PLCs, PACs, and SCADA systems.
- Hot‑Swap and Auto‑Configuration: Modules can be replaced without rewiring; configuration automatically restored via EEPROM.
- EEPROM Parameter Backup: Non‑volatile memory stores configuration and calibration data for easy module replacement.
- Programmable Power‑On and Safety Values: Ensures safe startup and fail‑safe operation during communication loss.
- Isolation Protection: 2.5 kV isolation between I/O, power, and communication circuits.
- Wide Power Input Range: Operates from +10 VDC to +60 VDC (ripple ≤ 5 V p‑p).
- Compact Design: 100 × 95 mm footprint, 20 mm slim width for space‑constrained installations.
- LED Diagnostics: Three front‑panel LEDs indicate power, communication, and system status for quick troubleshooting.
- Industrial‑Grade Reliability: Operating temperature −25 °C to +70 °C; humidity 5–95 % RH.
- Low Power Consumption: 1.6 W @ 24 VDC typical.
- Modbus Node Address via Rotary Switches: Hardware address setting without software tools.
- Watchdog Timers: Hardware and software watchdogs ensure automatic recovery from communication or system faults.
- DIN‑Rail or Wall Mounting: Flexible installation options with detachable base and pin‑array connectors.
- 5‑Year Warranty: Long‑term reliability assurance for industrial deployments.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|------------------|
| Digital Inputs (DI) | 4 channels, dry/wet selectable |
| Dry Contact Logic | Logic 0 = open; Logic 1 = short to GND |
| Wet Contact Logic | Logic 0 = ≤ 3 V; Logic 1 = 10–50 VDC |
| Input Resistance | 10 kΩ |
| Input Isolation | 2.5 kVDC |
| Over‑Voltage Protection | ±70 VDC |
| Counter Input Range | ≤ 100 Hz (16‑bit counter) |
| Latch Function | Yes, captures pulses ≥ 5 ms |
| Digital Outputs (DO) | 4 channels, NPN open‑collector |
| Output Voltage Range | 3.5 – 30 VDC |
| Max Output Current | 500 mA per channel |
| Startup/Safety Values | Programmable |
| Isolation Voltage | 2.5 kVDC between I/O, power, and communication |
| Power Supply | +10 VDC to +60 VDC (ripple ≤ 5 V p‑p) |
| Power Consumption | 1.6 W @ 24 VDC |
| Communication Interface | RS‑485, Modbus RTU |
| Baud Rate | 1200 – 115.2 kbps (default 9600 bps N,8,1) |
| Communication Distance | Up to 1.2 km (4000 ft) |
| Connectors | Plug‑in terminal blocks, 16–30 AWG |
| Indicators | Power, Communication, System LEDs |
| Dimensions | 100 mm (L) × 95 mm (H) × 20 mm (W) |
| Weight | Approx. 150 g |
| Operating Temperature | −25 °C to +70 °C |
| Storage Temperature | −30 °C to +75 °C |
| Humidity | 5 – 95 % RH (non‑condensing) |
| Mounting | DIN‑rail 35 mm or wall‑mount |
| Enclosure Material | Industrial‑grade ABS/PC plastic |
| Isolation Protection | Power, communication, and I/O isolation up to 2.5 kV |
| Compliance | CE, FCC Part 15 Class A, EMC (EMI/EMS) |

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### 4. Functionality

The W‑M2B501 operates as a remote digital I/O node in an RS‑485 Modbus RTU network. A host controller (PLC, PAC, or PC‑based SCADA) sends Modbus commands to read input states or control output channels. The module responds with real‑time data or executes output switching accordingly.

Use Cases and Applications:
- Industrial process monitoring and control
- Building and energy management systems
- Security and access control
- Machine automation and equipment interlocking
- Laboratory and test automation
- Remote data acquisition and distributed control systems

Compatibility:
- Fully compliant with Modbus RTU protocol
- Compatible with standard RS‑485 converters (USB‑to‑RS‑485, RS‑232‑to‑RS‑485)
- Integrates with Advanio’s Wolf Series modules for mixed analog/digital I/O networks
- Works with Modbus‑capable PLCs, HMIs, and SCADA software

Operation:
- Inputs can be configured as dry or wet contacts via wiring.
- Outputs are NPN open‑collector transistors capable of driving relays, solenoids, or indicator lamps.
- Node address is set using two rotary switches (1–247).
- EEPROM stores configuration parameters, which can be transferred to replacement modules.
- Watchdog timers monitor both module operation and host communication, ensuring automatic reset or safe‑state output on fault detection.

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### 5. Components & Accessories

Included Items:
- W‑M2B501 module
- Detachable DIN‑rail mounting base
- 14‑pin plug‑in terminal block connector
- Plastic grounding tab and isolation tab
- Quick start guide

Optional Accessories:
- RS‑232 ↔ RS‑485 isolated converter (Advanio G‑M1A001)
- USB ↔ RS‑485 converter (Advanio G‑M1E001)
- RS‑485 repeater (Advanio G‑M1F001, for long‑distance or > 32 nodes)
- Replacement EEPROM module for configuration backup

Connectors:
- Power input: 2‑pin terminal (+VS, GND)
- RS‑485 port: 2‑wire differential (D+, D−)
- I/O terminals: 14‑pin plug‑in block for DI/DO channels and commons

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### 6. Installation & Setup

Requirements:
- DC power supply +10 V to +60 V DC
- RS‑485 communication line (twisted‑pair shielded cable recommended)
- Host PC or controller with Modbus RTU master capability

Mounting Options:
1. DIN‑Rail Mounting:
- Attach the detachable base to a standard DIN 35 mm rail.
- Use the supplied pin‑array connectors to chain multiple modules for shared power and communication.
- Up to 10 modules per rail (≈ 30 W total).
2. Wall Mounting:
- Secure the base to a flat surface using screws through the mounting holes.
- Insert the module vertically into the base.

Grounding:
- For aluminum DIN‑rails, the rail serves as frame ground (FG).
- If electrical noise is present, use the plastic isolation tab to decouple FG from the rail.

Power Wiring:
- Connect +VS and GND to the power supply.
- Keep cable length short to minimize voltage drop.
- Ripple voltage must not exceed 5 V p‑p.

RS‑485 Communication:
- Daisy‑chain modules using D+ and D− lines.
- Connect the host at one end and terminate the last node with 120 Ω resistor.
- Avoid tapping intermediate modules to prevent signal reflections.

Configuration:
- Set Modbus node address via rotary switches (SW1 = ones, SW2 = tens).
- Default communication: 9600 bps, N, 8, 1.
- Adjust baud rate and parity using Advanio Utility software or Modbus registers.
- Press the INIT button ≥ 3 s to restore factory defaults.

Indicators:
- Power LED: ON = power good; flashes 3× at startup.
- Communication LED: Flashing = active data exchange; solid = timeout.
- System LED: Flashing = normal; solid = error or EEPROM mismatch.

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### 7. Performance & Capabilities

- Response Time: < 10 ms typical for Modbus polling cycles.
- Counter Function: Each DI channel counts pulses up to 100 Hz (16‑bit).
- Latch Function: Captures transient input pulses ≥ 5 ms.
- Output Drive: 500 mA per channel continuous, 30 V max.
- Power‑On Value: User‑defined output state upon startup.
- Safety Value: User‑defined output state on watchdog timeout or communication loss.
- Watchdog Timers:
- Module Watchdog: 1.6 s fixed hardware reset.
- System Watchdog: Programmable (0–25.5 s, 0.1 s resolution).
- Communication Distance: Up to 1.2 km (4000 ft) without repeater; 247 nodes max with repeaters.
- Isolation: 2.5 kV between I/O, power, and communication circuits.
- Reliability: Integrated hardware and software watchdogs ensure self‑recovery from noise or faults.
- Environmental Endurance: EMI/EMS tested for industrial environments; operates −25 °C to +70 °C.

Limitations:
- Designed for DC signals only (NPN outputs).
- Maximum 10 modules per DIN‑rail segment without additional power feed.
- RS‑485 requires proper termination and shielding for long runs.

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### 8. Standards & Compliance

- Communication Protocol: Modbus RTU over RS‑485
- Isolation Protection: 2.5 kV DC galvanic isolation
- EMC Compliance: Tested for EMI and EMS per industrial standards
- CE Certification: Meets European EMC requirements when installed in CE‑certified chassis
- FCC Compliance: Part 15 Class A – This device may not cause harmful interference and must accept any interference received.
- Environmental Safety: RoHS compliant; lead‑free construction
- Quality Assurance: Manufactured under Advanio’s ISO‑certified process with rigorous validation and testing

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### 9. Additional Information

Warranty: 5 years from date of purchase.
- Covers manufacturing defects and component failures under normal use.
- Excludes damage from improper installation, modification, or misuse.
- Defective units within warranty are repaired or replaced free of charge.

Support & Service:
- Technical support via email (service@advanio.com.tw) or official website (www.advanio.com).
- RMA procedure available for returns and repairs.
- Firmware updates and configuration utilities downloadable from Advanio’s website.

Maintenance:
- No periodic maintenance required.
- Keep terminals clean and free from dust or corrosion.
- Verify tight connections and proper grounding during routine system checks.

Software Tools:
- Advanio Utility for Windows: Used for module configuration, address setup, and I/O testing.
- Mobile App Support: Advanio Android/iOS apps available for remote monitoring and configuration.

Manufacturer Profile:
Advanio Technology Co., Ltd. is a Taiwan‑based developer of industrial I/O and embedded automation solutions. With over 20 years of field experience, Advanio focuses on robust, field‑tested hardware for smart factory and IoT applications. The Wolf Series embodies the company’s commitment to modular, space‑saving, and serviceable I/O designs for Industry 4.0 environments.

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### Summary

The Advanio W‑M2B501 is a compact, industrial‑grade 4‑channel digital input and 4‑channel digital output RS‑485 Modbus module engineered for distributed control and monitoring systems. It combines robust electrical isolation, flexible configuration, and user‑friendly maintenance features such as hot‑swap capability and EEPROM‑based parameter retention. Its wide power range, programmable safety states, and watchdog protection make it ideal for mission‑critical automation tasks in harsh industrial environments.

With CE/FCC compliance, a 5‑year warranty, and Advanio’s proven Wolf Series architecture, the W‑M2B501 offers a cost‑effective, space‑efficient solution for modern industrial I/O integration.