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

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### 1. Product Overview

Product Name: Ethernet Analog I/O Module
Model: EMA‑8308DA
Series: EMA‑8308 Series (includes EMA‑8308, EMA‑8308A, EMA‑8308D, EMA‑8308DA)
Article Number: EMA‑8308DA
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

The EMA‑8308DA is a high‑precision Ethernet‑based analog input/output module designed for industrial automation, remote data acquisition, and distributed control systems. It provides 8 differential analog inputs with 24‑bit resolution and 2 analog outputs with 16‑bit resolution, supporting both voltage and current signal ranges. The module integrates dual Ethernet ports for flexible network topology and offers web‑based configuration and control.

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### 2. Key Features

Analog Input Section
- 8 differential analog input channels (bi‑polar configuration)
- 24‑bit resolution for high‑accuracy signal acquisition
- Input ranges: ±5 V, ±10 V, 0–20 mA, 4–20 mA
- Sampling rate: 10 samples per second
- Common‑mode voltage tolerance up to 10 V
- Over‑voltage protection up to 20 V DC (max)
- Programmable input filters (7.03 kHz, 3.52 kHz, 1.76 kHz, 879 Hz)
- Offset error: 2.5 µV (typical), 5 µV (max)
- Offset drift: 20 nV/°C
- Common‑mode rejection ratio (CMRR): 120 dB

Analog Output Section
- 2 analog output channels
- 16‑bit resolution (high‑precision D/A conversion)
- Output range: −10 V DC to +10 V DC
- Overload protection: 50 mA (peak)
- Short‑circuit and over‑voltage protection (up to 20 V DC)

Ethernet Communication
- Dual 10/100 Mbps auto‑switching Ethernet ports (2 × RJ‑45)
- Web‑based configuration and control interface
- IP address reassignment and software‑based configuration
- Supports UDP protocol for remote I/O communication
- Software key and password protection for security
- Compatible with Windows and Linux environments via DLL libraries

General Features
- Compact DIN‑rail mountable metal enclosure
- Power supply: 12–24 V DC input
- Operating temperature: 0 °C to +70 °C
- Storage temperature: −20 °C to +80 °C
- Humidity: 5–95 % RH (non‑condensing)
- High reliability and remote addressability
- Factory default IP: 192.168.0.100, port 6936

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### 3. Technical Specifications

| Parameter | Specification |
|----------------|------------------|
| Analog Inputs | 8 differential (bi‑polar) |
| Input Resolution | 24 bits |
| Input Ranges | ±5 V, ±10 V, 0–20 mA, 4–20 mA |
| Input Type | Differential |
| Input Filter Options | 7.03 kHz, 3.52 kHz, 1.76 kHz, 879 Hz |
| Input Protection | 20 V DC (max) |
| Common‑Mode Voltage | Up to 10 V |
| CMRR | 120 dB |
| Sampling Rate | 10 samples/s |
| Offset Error | 2.5 µV typ., 5 µV max |
| Offset Drift | 20 nV/°C |
| Analog Outputs | 2 channels |
| Output Resolution | 16 bits |
| Output Range | −10 V DC to +10 V DC |
| Output Protection | 50 mA (peak) overload, 20 V DC over‑voltage |
| Ethernet Ports | 2 × RJ‑45, 10/100 Mbps auto‑switch |
| Power Supply | 12–24 V DC |
| Operating Temperature | 0 °C – +70 °C |
| Storage Temperature | −20 °C – +80 °C |
| Humidity | 5–95 % RH, non‑condensing |
| Dimensions | 107.6 (D) × 135.8 (W) × 34 (H) mm (4.3 × 5.4 × 1.4 in) |
| Mounting | DIN‑rail |
| Enclosure | Metal case |
| Default IP Address | 192.168.0.100 |
| Default Port | 6936 |
| Manufacturer | JS Automation Corp. |

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### 4. Functionality

The EMA‑8308DA operates as a remote analog I/O interface over Ethernet, enabling distributed measurement and control in industrial networks. It communicates via UDP protocol, allowing real‑time data exchange between the module and host controllers or SCADA systems.

Working Principle:
- Analog input signals (voltage or current) are sampled by a 24‑bit ADC at up to 10 samples/s.
- The module converts these signals into digital data accessible via Ethernet.
- Analog outputs are generated by 16‑bit DACs, providing precise voltage control from −10 V to +10 V.
- Configuration and monitoring can be performed through a built‑in web interface or via software APIs.

Use Cases and Applications:
- Remote analog voltage and current sensing
- Industrial process monitoring and control
- Sensor signal acquisition and conditioning
- Remote voltage output and actuator control
- Integration with PLCs, SCADA, and DCS systems
- Laboratory instrumentation and test automation

Compatibility:
- Supported operating systems: Windows 2000/XP/Vista and Linux
- Software integration via EMA8308.dll library
- Compatible with programming environments such as Microsoft Visual C/C++, Borland C/C++, and Visual Basic
- Supports multiple devices on the same network using unique CardID assignments

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### 5. Components & Accessories

Included Components:
- EMA‑8308DA main module
- Dual 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 (LED1)
- Factory preset voltage trimmers (DA0, DA1)

Pin Definitions:
- JM1/JM2 (Analog Inputs): AI00–AI07, AI10–AI17 with GND references
- JM3 (Analog Outputs): DA0, DA1, GND

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

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### 6. Installation & Setup

Requirements:
- Power supply: 12–24 V DC regulated
- Ethernet network connection (10/100 Mbps)
- Host PC or controller with Ethernet interface
- Installation software and drivers (available from JS Automation website)

Mounting Options:
- DIN‑rail mounting for industrial enclosures
- Metal housing ensures EMI shielding and mechanical durability

Configuration Steps:
1. Connect power to JM4 (24 V DC input).
2. Connect Ethernet cables to RJ‑45 ports (J2, J4).
3. Access the module via default IP (192.168.0.100) using a web browser or API.
4. Configure network parameters (IP, port) using software functions:
- `EMA8308_IP_change()`
- `EMA8308_socket_port_change()`
5. Set analog input configuration (differential/single‑end) and range using:
- `EMA8308_AD_config_set()`
- `EMA8308_AD_range_set()`
6. Verify operation using demo software or custom application via DLL interface.

Software Installation:
- Run `EMA8308_Install.exe` to install drivers, API, and demo programs.
- Default installation path: `..\JS Automation\EMA8308\`
- Includes directories for API headers, drivers, and executable demos.

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### 7. Performance & Capabilities

Analog Input Performance:
- 24‑bit ADC ensures high‑resolution measurement with minimal noise.
- Programmable filters allow trade‑off between bandwidth and noise:
- 7.03 kHz → 23 µV RMS noise
- 3.52 kHz → 3.6 µV RMS noise
- 1.76 kHz → 2.1 µV RMS noise
- 879 Hz → 1.5 µV RMS noise
- Excellent linearity and stability across temperature range.

Analog Output Performance:
- 16‑bit DAC provides fine voltage resolution (−10 V to +10 V).
- Output data range: −32768 to +32767 (digital representation).
- Overload protection ensures safe operation under transient conditions.

Network Performance:
- Dual Ethernet ports enable daisy‑chain or redundant network configurations.
- 10/100 Mbps auto‑negotiation ensures compatibility with modern networks.
- UDP‑based communication minimizes latency for real‑time control.

System Efficiency:
- Low power consumption due to efficient design.
- High reliability for continuous industrial operation.
- Supports multiple modules on a single network with unique CardIDs.

Limitations:
- Sampling rate limited to 10 samples/s (optimized for precision, not high‑speed acquisition).
- Analog output limited to ±10 V range and 50 mA peak current.

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### 8. Standards & Compliance

Electrical and Environmental Compliance:
- Designed for industrial environments (0–70 °C operation)
- Over‑voltage and overload protection on all analog channels
- Non‑condensing humidity tolerance up to 95 %

Network Standards:
- IEEE 802.3 10/100 Base‑T Ethernet
- UDP/IP communication protocol

Software and Interface Standards:
- Windows DLL interface compliant with standard C/C++ and Visual Basic calling conventions
- Compatible with standard TCP/IP networking stacks

Regulatory and Quality:
- Manufactured by JS Automation Corp., ISO‑certified industrial automation supplier
- Conforms to CE and FCC industrial EMC requirements (typical for JS Automation modules)

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### 9. Additional Information

Warranty & Support:
- Standard manufacturer warranty (contact JS Automation for terms)
- Technical support via email and online documentation
- Firmware and software updates available through official website

Maintenance:
- Periodic inspection of wiring and connectors recommended
- Firmware updates can be applied via Ethernet interface
- Factory calibration maintained through internal trimmers (DA0, DA1)

Software Updates & API Support:
- DLL library: `EMA8308.dll` (v1.0)
- API functions include initialization, configuration, data acquisition, and security control
- Supported functions (examples):
- `EMA8308_initial()` – Initialize and map IP/port
- `EMA8308_AD_channel_value_read()` – Read analog input value
- `EMA8308_DA_set()` – Set analog output voltage
- `EMA8308_security_unlock()` – Enable configuration access
- `EMA8308_reboot()` – Remote reboot command
- Error handling via standardized codes (e.g., `DEVICE_RW_ERROR`, `TIME_OUT_ERROR`, `PASSWORD_ERROR`)

Security Features:
- Password protection (default: “12345678”)
- Software key mechanism to prevent unauthorized configuration
- Functions for password change and reset to factory default

Firmware & Versioning:
- Firmware version readable via `EMA8308_firmware_version_read()`
- Version 1.0 corresponds to initial release of EMA‑8308DA hardware and software

Ordering Information:
| Model | Description |
|------------|----------------|
| EMA‑8308 | 24‑bit unipolar 8 diff/16 SE AI, 2 × 12‑bit AO |
| EMA‑8308A | 24‑bit unipolar 8 diff/16 SE AI, 2 × 16‑bit AO |
| EMA‑8308D | 24‑bit bipolar 8 diff AI, 2 × 12‑bit AO |
| EMA‑8308DA | 24‑bit bipolar 8 diff AI, 2 × 16‑bit AO |

Recommended Power Supplies:
- JD52000 (24 V DC @ 1.5 A)
- JS52026 (24 V DC @ 0.75 A)

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### Summary

The JS Automation EMA‑8308DA is a precision Ethernet analog I/O module engineered for industrial and laboratory applications requiring high‑accuracy analog signal acquisition and generation over Ethernet. With 8 differential 24‑bit analog inputs, 2 × 16‑bit analog outputs, and dual Ethernet ports, it provides a robust, flexible, and secure platform for distributed measurement and control. Its combination of hardware protection, software configurability, and cross‑platform API support makes it ideal for integration into modern automation systems, remote monitoring networks, and custom control applications.