Comprehensive Product Summary – EMA‑8308A Ethernet Analog I/O Module

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### 1. Product Overview

Product Name: Ethernet Bipolar Analog I/O Module
Model: EMA‑8308A
Series: EMA‑8308 / EMA‑8308A / EMA‑8308D / EMA‑8308DA Ethernet Analog I/O Modules
Article Number: EMA‑8308A
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
Website: [www.automation.com.tw](http://www.automation.com.tw) / [www.automation‑js.com](http://www.automation-js.com)
Email: [control.cards@automation.com.tw](mailto:control.cards@automation.com.tw)

Product Description:
The EMA‑8308A is a high‑precision Ethernet‑based analog input/output module designed for industrial automation, remote monitoring, and distributed control systems. It provides 8 differential or 16 single‑ended analog input channels with 24‑bit resolution and two 16‑bit analog output channels. The module supports dual Ethernet ports for flexible network topology and offers web‑based configuration and control. It is DIN‑rail mountable and operates from a 12–24 V DC power supply.

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### 2. Key Features

General Highlights
- Ethernet‑based remote analog I/O control module with web interface
- Dual 10/100 Mbps auto‑detecting LAN ports for flexible network integration
- High‑resolution 24‑bit analog input and 16‑bit analog output
- Supports both unipolar and bipolar input ranges
- Differential or single‑ended input configuration (software selectable)
- Over‑voltage and overload protection on all analog channels
- Compact metal enclosure suitable for DIN‑rail mounting
- Compatible with Windows and Linux via provided DLL libraries
- Remote addressable and configurable through IP and port settings
- Software security key and password protection for configuration access

Analog Input Section
- 24‑bit resolution with selectable input ranges
- Configurable as 16 single‑ended or 8 differential channels
- Sampling rate: 10 samples/s per channel
- Input ranges: 0–5 V, 0–10 V, 0–20 mA, 4–20 mA
- High common‑mode voltage tolerance up to 10 V
- Input filter bandwidths: 7.03 kHz, 3.52 kHz, 1.76 kHz, 879 Hz
- Over‑voltage protection up to 20 V DC

Analog Output Section
- Two 16‑bit D/A output channels
- Output range: ±10 V DC
- Overload protection: 50 mA (peak)
- Over‑voltage protection: 20 V DC (max)

Ethernet Section
- Two RJ‑45 ports (10/100 M auto‑switching)
- Web‑based configuration and control interface
- IP reassignment and port configuration via software
- Supports UDP communication protocol
- Default IP: 192.168.0.100 Default Port: 6936

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### 3. Technical Specifications

Analog Input
- Channels: 16 single‑ended or 8 differential
- Resolution: 24 bits
- Offset Error: 2.5 µV (typ), 5 µV (max)
- Offset Drift: 20 nV/°C
- Common‑Mode Rejection: 120 dB
- Sampling Rate: 10 samples/s
- Input Type: Differential or single‑ended (software selectable)
- Input Ranges:
- 0–5 V (23 bit effective)
- 0–10 V (24 bit effective)
- 0–20 mA (23 bit effective)
- 4–20 mA (22 bit effective)
- Input Filters: 7.03 kHz, 3.52 kHz, 1.76 kHz, 879 Hz
- Over‑Voltage Protection: 20 V DC (max)

Analog Output
- Channels: 2
- Resolution: 16 bits
- Output Range: ±10 V DC
- Overload Protection: 50 mA (peak)
- Over‑Voltage Protection: 20 V DC (max)

Ethernet Interface
- Ports: 2 × RJ‑45 (10/100 Mbps auto‑switching)
- Protocol: UDP/IP
- Default IP: 192.168.0.100
- Default Port: 6936
- Software Functions: IP change, port change, reboot, security lock/unlock

Power & Environmental
- Supply Voltage: 12–24 V DC
- Operating Temperature: 0 °C to +70 °C
- Storage Temperature: −20 °C to +80 °C
- Humidity: 5–95 % RH (non‑condensing)
- Power Connector: External 24 V DC terminal (JM4)

Mechanical
- Dimensions: 107.6 (D) × 135.8 (W) × 34 (H) mm (4.3 × 5.4 × 1.4 in)
- Mounting: DIN‑rail
- Enclosure: Metal case for EMI shielding and durability
- Weight: Approx. < 0.5 kg (typical)

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### 4. Functionality

Operating Principle
The EMA‑8308A functions as a remote analog I/O interface over Ethernet. It converts analog sensor signals (voltage or current) into digital data for transmission to a host controller or SCADA system and can output analog control voltages remotely. Communication occurs via UDP/IP, allowing low‑latency data exchange between the module and a supervisory computer.

Use Cases & Applications
- Industrial process monitoring and control
- Remote analog voltage and current sensing
- Data acquisition for laboratory or field instrumentation
- Distributed control systems (DCS) and SCADA integration
- Remote voltage output for actuator or signal simulation
- Integration with PLCs, PCs, or embedded controllers via Ethernet

Compatibility
- Compatible with Windows 2000/XP/Vista/7/10 and Linux systems
- Supported programming environments: Microsoft Visual C/C++, Borland C/C++, Visual Basic
- DLL‑based API (EMA8308.dll) for direct control and data acquisition
- Supports multiple modules on the same network via unique CardID assignment

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### 5. Components & Accessories

Included Components
- EMA‑8308A main module
- Two RJ‑45 Ethernet ports (J2, J4)
- Analog input connectors (JM1, JM2)
- Analog output connector (JM3)
- External power connector (JM4)
- System reset switch (SW2)
- System active LED indicator (LED1)
- Factory preset voltage trimmers (DA0, DA1)

Optional Accessories
- JD52000: 110/220 V AC → 24 V DC @ 1.5 A power supply
- JS52026: 110/220 V AC → 24 V DC @ 0.75 A power adapter

Connectors & Pinouts

*JM1 (Analog Input 0–7)*
1 AI00 2 AI01 3 AI02 4 AI03 5 GND 6 AI04 7 AI05 8 AI06 9 AI07 10 GND

*JM2 (Analog Input 8–15)*
1 AI10 2 AI11 3 AI12 4 AI13 5 GND 6 AI14 7 AI15 8 AI16 9 AI17 10 GND

*JM3 (Analog Output)*
1 DA0 2 DA1 3 GND

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### 6. Installation & Setup

Hardware Installation
- Mount the module on a standard DIN rail.
- Connect the 12–24 V DC power supply to JM4.
- Connect Ethernet cables to RJ‑45 ports J2 and J4.
- Wire analog input and output channels according to pin definitions.
- Observe polarity and voltage/current range limits.

Software Installation
1. Register as a user on [automation.com.tw](http://automation.com.tw) to download the “Step‑by‑Step Installation of Ethernet Module” guide.
2. Run `EMA8308_Install.exe` to install drivers, API, and demo programs.
3. Default installation path: `..\JS Automation\EMA8308\`
- `/API` – header and library files
- `/Driver` – driver code
- `/exe` – demo program and source code
4. The DLL (`EMA8308.dll`) is installed in the system directory.

Configuration
- Default IP: 192.168.0.100 Default Port: 6936
- Use provided software functions to change IP or port:
- `EMA8308_IP_change()`
- `EMA8308_socket_port_change()`
- Reboot module after configuration changes using `EMA8308_reboot()`.
- Security functions (`EMA8308_security_unlock()`, `EMA8308_password_change()`) protect against unauthorized access.

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### 7. Performance & Capabilities

Analog Input Performance
- 24‑bit resolution ensures high‑precision measurement.
- Typical offset error: 2.5 µV; drift 20 nV/°C.
- Common‑mode rejection ratio: 120 dB for noise immunity.
- Sampling rate: 10 samples/s per channel.
- Programmable input filters allow noise‑bandwidth trade‑off.
- Input protection up to 20 V DC prevents damage from transient surges.

Analog Output Performance
- 16‑bit resolution provides fine voltage control.
- Output range ±10 V DC with 50 mA peak overload protection.
- Stable output suitable for driving control signals or test equipment.

Network Performance
- Dual Ethernet ports enable daisy‑chain or redundant network configurations.
- 10/100 Mbps auto‑negotiation ensures compatibility with standard LANs.
- UDP protocol minimizes latency for real‑time control.
- IP and port reconfiguration supported via software API.

System Efficiency
- Low power consumption from 12–24 V DC supply.
- Compact form factor for dense control cabinet installations.
- Reliable operation across industrial temperature and humidity ranges.

Limitations
- Sampling rate limited to 10 samples/s (not suitable for high‑speed acquisition).
- Analog output current limited to 50 mA (peak).
- Requires proper grounding and shielding for optimal noise performance.

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### 8. Standards & Compliance

Electrical & Environmental Compliance
- Designed for industrial automation environments (0–70 °C operation).
- Over‑voltage and overload protection on all analog channels.
- Metal enclosure provides EMI/RFI shielding.
- Humidity tolerance up to 95 % RH (non‑condensing).

Software & Communication Standards
- Complies with standard Ethernet (IEEE 802.3 10/100 Base‑T).
- UDP/IP communication protocol for interoperability.
- DLL interface compatible with Windows dynamic link library standards.

Regulatory & Quality
- Manufactured by JS Automation Corp., ISO‑certified industrial electronics producer.
- Meets industrial safety and EMC design guidelines for control modules.

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### 9. Additional Information

Warranty & Support
- Standard manufacturer warranty (contact JS Automation for terms).
- Technical support via email and website resources.
- Firmware and software updates available through registered user portal.

Maintenance
- Periodic inspection of wiring and connectors recommended.
- Keep ventilation unobstructed and avoid exposure to corrosive environments.
- Firmware updates can be applied via Ethernet using provided utilities.

Software Development & Integration
- API functions provided for full control of analog input/output, configuration, and security.
- Example functions include:
- `EMA8308_initial()` – initialize and map IP
- `EMA8308_AD_channel_value_read()` – read analog input voltage
- `EMA8308_DA_set()` – set analog output voltage
- `EMA8308_IP_change()` – modify IP address
- `EMA8308_security_unlock()` – unlock configuration access
- Error codes (0–315) provide detailed diagnostics for communication and configuration issues.

Firmware & Versioning
- Firmware version 1.0 (initial release).
- DLL version 1.0 (EMA8308.dll v1.0).
- Future firmware updates available via JS Automation support portal.

Ordering Information
| Model | Input Type | Input Channels | Output Channels | Resolution (Input/Output) | Polarity |
|--------|-------------|----------------|-----------------|---------------------------|-----------|
| EMA‑8308 | Unipolar | 8 diff / 16 single | 2 | 24 bit / 12 bit | Unipolar |
| EMA‑8308A | Unipolar | 8 diff / 16 single | 2 | 24 bit / 16 bit | Unipolar |
| EMA‑8308D | Bipolar | 8 diff | 2 | 24 bit / 12 bit | Bipolar |
| EMA‑8308DA | Bipolar | 8 diff | 2 | 24 bit / 16 bit | Bipolar |

Recommended Power Supplies
- JD52000 – 24 V DC @ 1.5 A industrial power supply
- JS52026 – 24 V DC @ 0.75 A adapter

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### Summary

The JS Automation EMA‑8308A is a robust, high‑precision Ethernet analog I/O module engineered for industrial and laboratory applications requiring accurate remote measurement and control. With 24‑bit analog input resolution, 16‑bit analog output precision, and dual Ethernet connectivity, it provides a flexible and reliable platform for distributed data acquisition. Its web‑based configuration, DLL‑based software interface, and comprehensive protection features make it suitable for integration into modern automation systems, SCADA networks, and remote monitoring infrastructures.

The module’s combination of precision, configurability, and network flexibility positions it as a versatile solution for engineers and system integrators seeking reliable Ethernet‑based analog I/O performance in demanding industrial environments.