Comprehensive Product Summary – EMA7308D Ethernet Bipolar Analog I/O Module

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### 1. Product Overview

Product Name: Ethernet Bipolar Analog I/O Module
Model: EMA7308D
Series: EMA7308 / EMA7308A / EMA7308D / EMA7308DA Ethernet Analog I/O Module Series
Article Number: EMA7308D
Manufacturer: JS Automation Corp. (健昇科技股份有限公司)
Manufacturer Address: 6F, No.100, Chungshin Rd., Shitsu, Taipei, Taiwan, R.O.C.
Website: [http://www.automation.com.tw](http://www.automation.com.tw)
Contact: control.cards@automation.com.tw | Tel: +886-2-2647-6936 | Fax: +886-2-2647-6940

The EMA7308D is a high-precision, Ethernet-based analog input/output module designed for industrial automation, remote monitoring, and control applications. It provides 8 differential bipolar analog input channels with 24-bit resolution and 2 analog output channels with 12-bit resolution, supporting Ethernet communication for remote configuration and data acquisition. The module is part of JS Automation’s EMA7308 series, which includes both unipolar and bipolar variants with 12-bit or 16-bit output options.

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### 2. Key Features

Analog Input Features:
- 8 differential analog input channels (bipolar configuration)
- 24-bit resolution for high-accuracy signal acquisition
- Input ranges: ±5V, ±10V, 0–20mA, 4–20mA
- Sampling rate: 10 samples per second
- High common-mode voltage tolerance: up to 10V
- Over-voltage protection: up to 20VDC maximum
- Input filter options: 7.03 kHz, 3.52 kHz, 1.76 kHz, 879 Hz
- Excellent noise performance: RMS noise as low as 1.5 µV at lowest filter setting
- Offset error: 2.5 µV typical, 5 µV maximum
- Offset drift: 20 nV/°C
- Common-mode rejection ratio (CMRR): 120 dB

Analog Output Features:
- 2 analog output channels
- 12-bit resolution
- Output range: ±10VDC
- Overload protection: 50 mA (peak)
- Over-voltage protection: up to 20VDC

Ethernet Communication:
- 10/100 Mbps auto-detection
- Direct web-based control interface
- IP address re-assignment capability
- Supports remote configuration and monitoring
- Compatible with Windows and Linux via provided DLL libraries

General Features:
- DIN rail mountable for industrial environments
- Power supply: 12–24VDC input
- Compact design: 89 × 110 × 34 mm
- Operating temperature: 0°C to +70°C
- Storage temperature: -20°C to +80°C
- Humidity tolerance: 5–95% RH (non-condensing)
- High reliability and remote addressability

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### 3. Technical Specifications

Analog Input Section:
- Channels: 8 differential inputs
- Resolution: 24-bit
- Input Ranges:
- ±5V (23-bit effective)
- ±10V (24-bit effective)
- 0–20mA (23-bit effective)
- 4–20mA (22-bit effective)
- Sampling Rate: 10 samples per second
- Input Filter Frequencies: 7.03 kHz, 3.52 kHz, 1.76 kHz, 879 Hz
- Over-voltage Protection: 20VDC (max)
- Common Mode Voltage: up to 10V
- CMRR: 120 dB
- Offset Error: 2.5 µV typical, 5 µV max
- Offset Drift: 20 nV/°C

Analog Output Section:
- Channels: 2
- Resolution: 12-bit
- Output Range: ±10VDC
- Overload Protection: 50 mA (peak)
- Over-voltage Protection: 20VDC (max)

Ethernet Interface:
- Speed: 10/100 Mbps auto-switching
- Protocol: TCP/IP-based communication
- Configuration: Web-based interface and DLL API
- Default IP: 192.168.0.100
- Default Ports: Host 15120 / Remote 6936

Power & Environmental:
- Power Supply: 12–24VDC
- Operating Temperature: 0°C to +70°C
- Storage Temperature: -20°C to +80°C
- Humidity: 5–95% RH, non-condensing
- Dimensions: 89(D) × 110(W) × 34(H) mm (3.5 × 4.33 × 1.39 in)
- Mounting: DIN rail

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### 4. Functionality

The EMA7308D functions as a network-enabled analog I/O interface, converting analog signals from sensors or transducers into digital data accessible over Ethernet. It also provides analog output channels for control signals to actuators or other devices.

Operation Principle:
- Analog inputs are sampled at 10 samples per second with 24-bit resolution.
- The module supports bipolar voltage and current inputs, allowing flexible integration with industrial sensors.
- Data is transmitted via Ethernet to a host PC or controller, where it can be processed, logged, or visualized.
- Analog outputs can be set remotely to generate control voltages (±10V) for actuators or signal simulation.

Use Cases:
- Remote analog voltage and current sensing
- Industrial process monitoring and control
- Data acquisition systems
- Laboratory instrumentation
- Remote voltage control and signal generation
- Integration with SCADA or PLC systems via Ethernet

Compatibility:
- Compatible with Windows 2000/XP/Vista and later
- Supports Linux via provided DLLs
- Programmable using C/C++, Visual Basic, or any environment supporting Windows DLLs

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### 5. Components & Accessories

Included Components:
- EMA7308D main module
- Ethernet RJ45 port (J1)
- 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 (Analog Inputs 0–7): AI00–AI07, GND
- JM2 (Analog Inputs 8–15): AI10–AI17, GND
- JM3 (Analog Outputs): DA0, DA1, GND

Optional Accessories:
- JD52000: 110/220VAC to 24VDC @1.5A power supply
- JD52026: 110/220VAC to 24VDC @0.75A power adapter

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### 6. Installation & Setup

Mounting:
- Designed for DIN rail installation in control cabinets or industrial enclosures.

Power Requirements:
- Supply voltage: 12–24VDC
- Connect external power via JM4 connector.

Network Configuration:
- Connect via standard Ethernet cable to a network switch or directly to a PC.
- Default IP: 192.168.0.100 (can be reassigned)
- Default communication ports: Host 15120, Remote 6936
- Supports IP reassignment and port configuration via software commands.

Software Installation:
1. Install the EMA driver using `EMA7308_Install.exe`.
2. The installation creates directories for API, driver, and demo programs.
3. DLLs and libraries are provided for integration with C/C++ or Visual Basic.
4. Register as a user on JS Automation’s website to access the “Step-by-step installation” guide.

Configuration:
- Use the provided DLL functions to initialize, configure, and operate the module.
- Functions include initialization (`EMA7308_Initial`), reading inputs (`EMA7308_AD_read`), setting outputs (`EMA7308_DA_set`), and changing IP or port settings.
- Security features include password protection and remote reset to factory defaults.

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### 7. Performance & Capabilities

Analog Input Performance:
- High-resolution 24-bit ADC ensures precise measurement of low-level signals.
- Sampling rate of 10 samples/s suitable for slow to moderate process monitoring.
- Excellent noise suppression and high CMRR for differential measurements.
- Configurable input filters allow trade-off between speed and noise performance.

Analog Output Performance:
- 12-bit DAC provides smooth ±10V output control.
- Peak current protection up to 50 mA ensures safe operation under load.
- Suitable for driving control signals or simulating analog sources.

Ethernet Communication:
- Reliable 10/100 Mbps auto-switching interface.
- Supports direct web-based control and remote configuration.
- DLL-based API enables integration into custom applications and automation systems.

Limitations:
- Sampling rate limited to 10 samples/s per channel.
- Analog output limited to ±10V and 50 mA peak current.
- Designed for non-condensing environments (RH <95%).

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### 8. Standards & Compliance

Electrical & Environmental Compliance:
- Designed for industrial environments with wide operating temperature and humidity ranges.
- Over-voltage and overload protection on all analog channels.
- Complies with general industrial EMC and safety standards (manufacturer internal compliance).

Software & Communication Standards:
- Ethernet IEEE 802.3 compliant
- TCP/IP communication protocol
- Compatible with Windows and Linux operating systems

Quality & Reliability:
- Manufactured by JS Automation Corp., ISO-certified industrial automation supplier.
- Each module undergoes factory calibration and functional testing.

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### 9. Additional Information

Warranty & Support:
- Standard manufacturer warranty (details available from JS Automation).
- Technical support via email and website.
- Firmware and software updates available online.

Maintenance:
- Minimal maintenance required.
- Periodic inspection of connectors and power supply recommended.
- Firmware updates can be applied via Ethernet interface.

Software Updates & API:
- Latest DLLs and drivers downloadable from JS Automation’s website.
- Supported development environments:
- Microsoft Visual C/C++
- Borland C/C++
- Microsoft Visual Basic
- API functions include initialization, configuration, data acquisition, and security management.

Security Features:
- Password-protected configuration and output control.
- Functions for unlocking, reading security status, changing passwords, and resetting to factory defaults.
- Default password: “12345678”.

Error Handling:
- Comprehensive error code system for diagnostics:
- `INITIAL_SOCKET_ERROR` (1): Ethernet initialization failure
- `IP_ADDRESS_ERROR` (2): Invalid IP address
- `DEVICE_RW_ERROR` (100): Communication failure
- `TIME_OUT_ERROR` (310): Response timeout
- `PASSWORD_ERROR` (308): Password mismatch
- Status codes returned by all API functions for robust error handling.

Software Library (EMA7308.dll):
- Provides full control over analog input/output and configuration.
- Functions include:
- `EMA7308_Initial()`, `EMA7308_close()`
- `EMA7308_AD_read()`, `EMA7308_DA_set()`, `EMA7308_DA_read()`
- `EMA7308_parameters_set()`, `EMA7308_parameters_read()`
- `EMA7308_IP_change()`, `EMA7308_socket_port_change()`
- `EMA7308_security_unlock()`, `EMA7308_password_change()`, `EMA7308_password_set_default()`

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### Summary

The JS Automation EMA7308D is a robust, Ethernet-enabled analog I/O module engineered for precision measurement and control in industrial automation systems. With 8 differential 24-bit bipolar analog inputs and 2 12-bit analog outputs, it offers high accuracy, flexible input ranges, and reliable Ethernet communication. Its compact DIN-rail design, wide operating range, and comprehensive software support make it ideal for remote monitoring, process control, and data acquisition applications. The module’s combination of hardware protection, configurable filters, and secure network control ensures dependable performance in demanding industrial environments.