Comprehensive Product Summary: EMP2-X4S1-W1-A71 – mPCIe to Four Isolated RS-485 Module

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### 1. Product Overview

Product Name: mPCIe to Four Isolated RS-485 Module
Model: EMP2-X4S1-W1-A71
Series: EMP2-X4S1
Article Number: EMP2-X4S1-W1-A71
Manufacturer: Innodisk Corporation

Product Type: Mini PCI Express (mPCIe) expansion module providing four isolated RS-485 serial communication ports.
Primary Function: Enables reliable, high-speed, and isolated RS-485 communication channels through a compact mPCIe interface for embedded and industrial computing systems.

Manufacturer Headquarters:
Innodisk Corporation
5F., No.237, Sec. 1, Datong Rd., Xizhi Dist., New Taipei City 221, Taiwan
Tel: +886-2-7703-3000
Email: sales@innodisk.com
Website: [www.innodisk.com](http://www.innodisk.com)

Regional Offices:
- USA: usasales@innodisk.com | +1-510-770-9421
- Europe: eusales@innodisk.com | +31-40-3045-400
- Japan: jpsales@innodisk.com | +81-3-6667-0161
- China: sales_cn@innodisk.com | +86-755-21673689

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### 2. Key Features

- PCI Express 2.0 Compliance: Fully compliant with PCI-Express Specification Revision 2.0, ensuring compatibility with modern embedded and industrial computing platforms.
- Four Isolated RS-485 Ports: Provides four independent RS-485 half-duplex communication channels with galvanic isolation for enhanced signal integrity and protection.
- High-Speed Serial Communication: Supports data rates up to 10 Mbps, suitable for demanding industrial automation and control applications.
- 16C550 Compatible UART: Each port is 16C550 compatible with 256-byte FIFO buffers, ensuring efficient data handling and reduced CPU overhead.
- 2.5 kV Isolation Protection: Port-to-computer isolation compliant with IEC 60950-1:2005 + A1:2009 + A2:2013, providing 2.5 kV HiPOT protection for safety and reliability in electrically noisy environments.
- ESD Protection: Meets EN61000-4-2 standards with Air Discharge: ±15 kV and Contact Discharge: ±8 kV, protecting against electrostatic discharge damage.
- Configurable Termination Resistors: Onboard switch (SW1) allows enabling or disabling of termination resistors for flexible network configuration.
- Industrial Temperature Range: Designed for -40°C to +85°C operation, suitable for harsh industrial and outdoor environments.
- Durable Gold-Plated Connector: Features 30 µin (micro-inch) gold-plated contacts for improved conductivity and corrosion resistance.
- Compact mPCIe Form Factor: Small footprint (30 x 50.9 x 12.55 mm) ideal for embedded systems, industrial PCs, and IoT gateways.
- Low Power Consumption: Typical power draw of 0.46 W (3.3V x 140 mA) ensures energy efficiency.
- Long-Term Reliability: Backed by a 3-year warranty and designed for continuous industrial operation.

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|-------------------|
| Form Factor | Mini PCI Express (mPCIe) |
| Input Interface | PCI Express 2.0 |
| Output Interface | RS-485 (Isolated, Half Duplex) |
| Number of Ports | 4 independent RS-485 channels |
| Output Connector | DB-9 x 4 |
| Data Rate | Up to 10 Mbps |
| UART Compatibility | 16C550 compatible with 256-byte FIFO |
| Isolation Voltage | 2.5 kV (HiPOT) |
| ESD Protection | EN61000-4-2 compliant: ±15 kV (Air), ±8 kV (Contact) |
| Termination Control | Switch-selectable termination resistor (SW1) |
| Power Consumption | 0.46 W (3.3V x 140 mA) |
| Dimensions (W x L x H) | 30 x 50.9 x 12.55 mm |
| Operating Temperature | -40°C to +85°C |
| Storage Temperature | -55°C to +95°C |
| Vibration Resistance | 5G @ 7–2000 Hz |
| Shock Resistance | 50G @ 0.5 ms |
| Connector Plating | 30 µin gold finger |
| Warranty | 3 years |
| Driver Support | Windows XP (32-bit), 7 (32/64-bit), 8/8.1 (32/64-bit), 10, WES7, CE7.0; Linux Kernel 2.6.x and above |
| Driver Availability | Downloadable from MyInnodisk website |
| Compliance Standards | IEC 60950-1, EN61000-4-2 |

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### 4. Functionality

The EMP2-X4S1-W1-A71 module functions as a bridge between a host system’s PCI Express bus and multiple isolated RS-485 communication channels. It enables embedded systems, industrial controllers, and automation equipment to communicate with RS-485-based devices such as sensors, PLCs, motor controllers, and data acquisition modules.

Operational Principle:
- The module interfaces with the host system via the mPCIe slot, utilizing the PCI Express 2.0 protocol for high-speed data transfer.
- Each of the four RS-485 ports operates in half-duplex mode, allowing bidirectional communication over a single differential pair (D+ and D−).
- Integrated isolation circuitry ensures electrical separation between the host and the RS-485 lines, protecting against ground loops and voltage surges.
- The onboard switch (SW1) allows users to enable or disable termination resistors, optimizing signal integrity for different network topologies.

Typical Use Cases:
- Industrial automation and control systems
- Building management and HVAC control
- Transportation and railway communication systems
- Energy management and smart grid devices
- Embedded computing platforms requiring multiple serial interfaces
- IoT gateways and edge computing nodes

Compatibility:
- Compatible with standard mPCIe slots on industrial PCs, embedded boards, and single-board computers.
- Supports major operating systems including Windows and Linux.
- Linux source code available for driver modification and integration into custom kernels.

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### 5. Components & Accessories

Included Components:
- EMP2-X4S1-W1-A71 mPCIe module
- Four DB-9 connectors (RS-485 output interface)
- Configuration switch (SW1) for termination control
- Documentation and driver download instructions

Optional Accessories (available separately):
- DB-9 to terminal block adapters for field wiring
- Shielded RS-485 cables
- Mounting brackets or retention clips for secure installation in vibration-prone environments
- Extended cable harnesses for remote port access

Connectors:
- Input: mPCIe edge connector (30 µin gold-plated contacts)
- Output: Four DB-9 female connectors providing RS-485 half-duplex signals

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### 6. Installation & Setup

System Requirements:
- Host system with available mPCIe slot (PCI Express 2.0 compliant)
- Supported operating system (Windows XP/7/8/10, WES7, CE7.0, or Linux Kernel 2.6.x and above)
- Access to MyInnodisk website for driver download

Installation Steps:
1. Power off the host system and disconnect from power.
2. Insert the EMP2-X4S1-W1-A71 module into the mPCIe slot, ensuring proper alignment of the gold fingers.
3. Secure the module using the provided screw or retention clip.
4. Connect RS-485 devices to the DB-9 connectors.
5. Configure the termination resistor using the onboard switch (SW1):
- ON: Termination enabled (for end-of-line devices)
- OFF: Normal mode (for intermediate devices)
6. Power on the system and install the appropriate driver from the MyInnodisk website.
7. Verify port recognition in the operating system’s device manager or terminal interface.

Configuration:
- Software configuration through standard COM port settings (baud rate, parity, stop bits, etc.).
- Hardware configuration via SW1 for termination control.

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### 7. Performance & Capabilities

Data Throughput:
- Supports up to 10 Mbps serial data rate per channel, ensuring fast and reliable communication for industrial protocols such as Modbus RTU, Profibus, and BACnet.

Isolation & Protection:
- 2.5 kV isolation between system and communication ports prevents damage from transient voltages and ground potential differences.
- ESD protection up to ±15 kV (air) and ±8 kV (contact) ensures robust operation in electrostatically harsh environments.

Power Efficiency:
- Low power consumption of 0.46 W minimizes thermal load and energy usage, ideal for fanless and compact embedded systems.

Environmental Robustness:
- Operates reliably across a wide temperature range (-40°C to +85°C).
- Withstands vibration (5G @ 7–2000 Hz) and shock (50G @ 0.5 ms), meeting industrial-grade durability standards.

Limitations:
- RS-485 ports operate in half-duplex mode only (no full-duplex support).
- Requires external DB-9 cabling for device connection.
- Limited to four ports per module; additional modules required for higher port counts.

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### 8. Standards & Compliance

Electrical and Safety Standards:
- PCI Express Specification Rev. 2.0 – Ensures interoperability with modern PCIe-based systems.
- IEC 60950-1:2005 + A1:2009 + A2:2013 – Safety standard for information technology equipment, ensuring 2.5 kV isolation compliance.

Electromagnetic Compatibility (EMC):
- EN61000-4-2 – ESD immunity standard: ±15 kV (air), ±8 kV (contact).

Environmental and Reliability Standards:
- Designed for industrial-grade operation with extended temperature and vibration/shock resistance.
- Manufactured under Innodisk’s quality management system, ensuring consistent performance and reliability.

Regulatory Compliance:
- RoHS compliant (lead-free manufacturing).
- CE and FCC compliance (depending on system integration).

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### 9. Additional Information

Warranty:
- 3-year limited warranty covering manufacturing defects and component reliability under normal operating conditions.

Support & Maintenance:
- Technical support available through Innodisk’s global service network.
- Driver updates and documentation accessible via the MyInnodisk online portal.
- Linux source code provided for driver customization and integration into proprietary systems.

Maintenance Recommendations:
- Periodically inspect connectors for dust or corrosion.
- Ensure proper grounding and shielding in high-EMI environments.
- Update drivers and firmware as provided by Innodisk to maintain optimal performance and compatibility.

Product Lifecycle & Updates:
- Designed for long-term availability in industrial markets.
- Specifications subject to change without prior notice (as per Innodisk’s continuous improvement policy).

Order Information:
- Model: EMP2-X4S1-W1 (Wide Temperature Version)
- Description: mPCIe to Four Isolated RS-485 Module
- Availability: Contact regional Innodisk sales offices for pricing and lead time.

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### Summary

The Innodisk EMP2-X4S1-W1-A71 is a high-performance, industrial-grade mPCIe expansion module that provides four isolated RS-485 communication ports. Engineered for reliability, safety, and flexibility, it combines PCI Express 2.0 compliance, robust electrical isolation, and wide temperature operation in a compact form factor. With support for up to 10 Mbps data rates, 2.5 kV isolation, and comprehensive ESD protection, it is ideally suited for industrial automation, embedded computing, and IoT applications requiring secure and stable serial communication.

Its combination of low power consumption, configurable termination, and broad OS compatibility makes it a versatile solution for system integrators and OEMs seeking to expand serial connectivity in space-constrained environments. Backed by Innodisk’s 3-year warranty and global support infrastructure, the EMP2-X4S1-W1-A71 delivers dependable performance for mission-critical industrial communication systems.