Comprehensive Product Summary – EMC‑8485 Ethernet to Isolated RS‑485 Converter (8×DIO‑TTL, 2×LAN Module)

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### 1. Product Overview

Product Name: Ethernet to Isolated RS‑485 Converter with 8×DIO‑TTL and Dual LAN Ports
Model: EMC‑8485
Series: EMC‑84xx Series (includes EMC‑8432 and EMC‑8485 variants)
Article Number: EMC‑8485
Manufacturer: JS Automation Corp. (健昇科技股份有限公司)
Manufacturer Address: 6F., No.100, Zhongxing Rd., Xizhi Dist., New Taipei City, Taiwan
Contact:
- Tel: +886‑2‑2647‑6936
- Fax: +886‑2‑2647‑6940
- Email: control.cards@automation.com.tw
- Websites: [www.automation.com.tw](http://www.automation.com.tw) / [www.automation‑js.com](http://www.automation-js.com)

Product Description:
The EMC‑8485 is a compact, industrial‑grade Ethernet‑to‑RS‑422/485 converter module with 8 configurable digital I/O channels (TTL level) and dual 10/100 Mbps Ethernet ports. It provides galvanic isolation on the serial interface, supports baud rates up to 921.6 kbps, and includes software‑configurable RS‑422/RS‑485 modes. The module is designed for DIN‑rail mounting and powered by 12–24 V DC. It integrates counter functionality (up to 200 Hz) and supports standalone operation, virtual COM port emulation, and remote configuration via DLL‑based software libraries.

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### 2. Key Features

- Dual Ethernet Ports: Two 10/100 Mbps auto‑negotiating RJ‑45 interfaces for flexible network topology (daisy‑chain or redundant connection).
- Isolated RS‑422/485 Interface: Magnetic coupling isolation ensures reliable communication and protection against ground loops.
- Configurable Digital I/O: Eight TTL‑level I/O lines (IO_0–IO_7), each independently configurable as input or output.
- High Drive Capability: Digital outputs support up to 500 mA peak current at 45 V DC maximum.
- Counter Functionality: Each input can function as a low‑frequency counter (≤ 200 Hz).
- Wide Baud Rate Range: 1200 bps to 921,600 bps, supporting 5–8 data bits, 1–1.5 stop bits, and parity options (None, Even, Odd).
- Software‑Selectable Serial Mode: RS‑422 or RS‑485 operation selectable via software command.
- Over‑Voltage and Over‑Current Protection: Inputs protected up to 60 V DC and 50 mA.
- Flexible Power Supply: Operates from 12 V DC to 24 V DC.
- Compact Metal Enclosure: Industrial‑grade metal housing with DIN‑rail mounting capability.
- Standalone Logic Control: Built‑in standalone mode allows autonomous I/O control based on pre‑programmed logic sequences.
- Virtual COM Port Support: Emulates a standard COM port over Ethernet for legacy software compatibility.
- Software Security Key: Password‑protected configuration and control to prevent unauthorized access.
- Firmware and API Support: Comprehensive DLL library (EMC84xx.dll) for Windows 2000 and later, supporting C/C++, Visual Basic, and Borland environments.
- Auto IP and Port Configuration: IP reassignment and socket port modification supported via software commands.
- Diagnostics and Status LEDs: System activity and communication indicators for quick status verification.

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### 3. Technical Specifications

Physical Characteristics
- Dimensions: 107.6 mm (D) × 135.8 mm (W) × 34 mm (H) (4.3 × 5.4 × 1.4 in)
- Weight: Approx. 0.5 kg (metal enclosure)
- Mounting: DIN‑rail or panel mount
- Enclosure Material: Metal, industrial‑grade

Power Requirements
- Input Voltage: 12 V DC – 24 V DC
- Power Connector: JM4 terminal block (external 24 V input)
- Typical Consumption: < 5 W

Environmental Conditions
- Operating Temperature: 0 °C – +70 °C
- Storage Temperature: −20 °C – +80 °C
- Humidity: 5 % – 95 % RH (non‑condensing)

Ethernet Interface
- Ports: 2 × RJ‑45 (10/100 Mbps auto‑switching)
- Protocols: TCP/IP, UDP, ICMP
- Default IP Address: 192.168.0.100
- Default Ports: Host = 25122, Remote = 6936
- Isolation: Transformer‑coupled

Serial Interface (RS‑422/RS‑485)
- Isolation: Magnetic coupler isolation
- Baud Rates: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200, 921600 bps
- Data Bits: 5, 6, 7, 8
- Stop Bits: 1, 1.5
- Parity: None, Even, Odd
- Flow Control: Xon/Xoff, Hardware (RTS/CTS), or None
- Mode Selection: RS‑422 (default) or RS‑485 (software‑selectable)
- Connector: JM3 terminal block

Digital I/O (JM2 Connector)
- Channels: 8 configurable (IO_0 – IO_7)
- Logic Levels:
- Logic High ≥ 3.15 V
- Logic Low ≤ 1.35 V
- Input Protection: 60 V DC max, 50 mA max
- Output Type: Transistor open‑collector
- Output Capacity: 500 mA peak, 45 V DC max
- Polarity: Programmable (normal/inverted)
- Counter Frequency: ≤ 200 Hz per channel
- External Reference Voltage (+Ve): 3.3 V – 24 V DC

Indicators and Controls
- LED1: System active indicator
- SW2: System reset switch

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### 4. Functionality

Operational Concept:
The EMC‑8485 bridges Ethernet and serial communication networks, enabling remote access to RS‑422/485 devices. It converts serial data streams into TCP/IP packets and vice versa, allowing transparent communication between networked systems and legacy serial equipment.

Use Cases and Applications:
- Industrial automation and SCADA systems
- Remote data acquisition and control
- Serial device networking (PLC, sensors, meters)
- Distributed I/O monitoring and control
- Machine‑to‑machine (M2M) communication
- Integration of legacy RS‑485 devices into Ethernet networks

Compatibility:
- Compatible with Windows 2000 and later operating systems
- Supports programming via C/C++, Visual Basic, Borland C++ Builder, and Delphi
- Works with JS Automation’s EMC84xx software suite and DLL library

Standalone Mode:
The module can operate independently without Ethernet connection. Users can pre‑program up to 32 logic commands combining input conditions, timers, and output actions. Timer resolution is 5 ms per tick, supporting delay, pulse, and periodic modes.

Virtual COM Port Mode:
Through the EMC84xx_VSPM driver, the module appears as a standard COM port to Windows applications. This allows existing serial software to communicate transparently over Ethernet.

Security and Access Control:
Password‑protected configuration prevents unauthorized changes. Default password: “12345678”. Security status can be queried and reset to factory defaults remotely.

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### 5. Components & Accessories

Included Components:
- EMC‑8485 converter module
- Software package (driver, DLL library, demo programs)
- User manual and installation guide

Connectors:
- JM2 (I/O Connector):
1 = +Ve, 2–9 = IO_0–IO_7, 10 = GND
- JM3 (RS‑422/485 Connector):
- RS‑422: TXD+, TXD−, RXD+, RXD−, EXTG
- RS‑485: D+, D−, EXTG
- JM4: External power input (12–24 V DC)

Optional Accessories:
- JD52000: 110/220 V AC → 24 V DC @ 1.5 A power supply
- JD52026: 110/220 V AC → 24 V DC @ 0.75 A power adapter

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### 6. Installation & Setup

Hardware Installation:
1. Mount the EMC‑8485 on a DIN rail or panel.
2. Connect power (12–24 V DC) to JM4.
3. Connect Ethernet cables to J2 and J3 RJ‑45 ports.
4. Wire RS‑422/485 lines to JM3, ensuring EXTG is connected between devices for noise immunity.
5. Connect digital I/O lines to JM2 as required.

Software Installation:
- Run `EMC84xx_Install.exe` to install drivers, API, and demo programs.
- Default installation path: `..\JS Automation\EMC84xx\`
- Includes subdirectories for API headers, drivers, and example code.

Configuration:
- Use DLL functions to set IP address (`EMC84xx_IP_change`), communication ports, and serial parameters.
- Default IP: 192.168.0.100; default remote port: 6936.
- Reboot module after configuration changes (~10 s delay).

Programming Interface:
- API provided via `EMC84xx.dll` with import libraries for Microsoft and Borland compilers.
- Functions include initialization, configuration, I/O control, counter management, and standalone operation.

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### 7. Performance & Capabilities

Communication Performance:
- Ethernet: 10/100 Mbps full‑duplex auto‑negotiation
- Serial: Up to 921.6 kbps baud rate
- Latency: Configurable timeout (1000–10000 ms)
- Counter Input: Reliable up to 200 Hz

I/O Performance:
- Input debounce frequency: 200 Hz (signals faster than 200 Hz may be filtered as noise)
- Output switching: TTL‑compatible, transistor‑driven
- Timer resolution: 5 ms per tick

Standalone Execution:
- Up to 32 programmable logic commands
- Modes: delay, pulse, periodic, or timer‑triggered
- Power‑on auto‑execution option

Limitations:
- Counter frequency limited to 200 Hz
- Timer base fixed at 5 ms increments
- Operating temperature limited to +70 °C

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### 8. Standards & Compliance

Electrical and Safety:
- Over‑voltage and over‑current protection on all digital inputs
- Magnetic isolation on RS‑422/485 interface
- Designed for industrial EMC environments

Software and Protocol Compliance:
- Complies with standard TCP/IP networking protocols
- Compatible with Windows COM port emulation standards

Quality and Manufacturing:
- Manufactured by JS Automation Corp., ISO‑certified facility (Taiwan)
- Designed for industrial automation and control applications

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### 9. Additional Information

Firmware & Software:
- Firmware version: 1.0 (EMC84xx.dll v1.0)
- Software supports Windows 2000 and later
- API functions documented for C/C++, Visual Basic, and Borland environments

Error Handling:
Comprehensive error codes (0–342) cover socket initialization, IP configuration, security, counter, port, and standalone function errors. Example:
- `INITIAL_SOCKET_ERROR` (1): Ethernet hardware problem
- `IP_ADDRESS_ERROR` (2): Invalid IP address
- `COUNTER_READ_ERROR` (316): Counter data read failure

Maintenance:
- Periodic inspection of wiring and connectors recommended
- Firmware updates available via JS Automation website
- Reset switch (SW2) for system reboot

Warranty & Support:
- Standard manufacturer warranty (details per distributor)
- Technical support via email and online documentation
- User club registration provides access to installation guides and firmware updates

Ordering Information:
- EMC‑8485: Ethernet to RS‑422/485 converter with 8 I/O channels
- JD52000: 24 V DC @ 1.5 A power supply
- JD52026: 24 V DC @ 0.75 A power adapter

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### Summary

The JS Automation EMC‑8485 is a robust, feature‑rich Ethernet‑to‑RS‑422/485 converter designed for industrial automation, remote I/O control, and serial device networking. Its dual Ethernet ports, isolated serial interface, and configurable digital I/O make it ideal for distributed control systems requiring reliable communication and flexible integration. With comprehensive software support, standalone logic capability, and secure remote configuration, the EMC‑8485 provides a complete solution for bridging legacy serial equipment to modern Ethernet infrastructures.