1. Product Overview
Product Name: PC A/D Card 32SE Isolated 12-bit 100S/s Thermocouple with RTD
Model Number: AX5232
Article Number: AX5232
Series: AX5000 Series (Axiom Data Acquisition and Control Interface Cards)
Manufacturer: Axiom Technology Co., Ltd.

The Axiom AX5232 is a high-performance, isolated analog-to-digital (A/D) conversion card designed for PC-based data acquisition systems. It provides 32 single-ended analog input channels with 12-bit resolution and a maximum sampling rate of 100 samples per second (100 S/s). The card supports multiple thermocouple types and includes an RTD (Pt100) sensor for cold junction compensation, making it ideal for precision temperature measurement and industrial monitoring applications. With robust electrical isolation, flexible gain settings, and integrated digital I/O, the AX5232 delivers reliable and accurate analog data acquisition in demanding environments.

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2. Key Features
- 32 Single-Ended Analog Input Channels: Supports simultaneous measurement of up to 32 analog signals.
- 12-bit Resolution: Provides precise analog-to-digital conversion suitable for temperature, voltage, and process signal monitoring.
- Sampling Rate: Up to 100 samples per second (100 S/s), optimized for low-frequency and temperature-based measurements.
- Input Isolation: 500 V DC isolation between input channels and the system bus, ensuring protection against ground loops and electrical noise.
- Wide Gain Range: Programmable gain settings of 1, 100, 200, 250, 500, 831, and 1000 for flexible signal scaling and sensitivity adjustment.
- Thermocouple Compatibility: Supports multiple thermocouple types — J, K, S, T, E, R, B, and N — for broad temperature measurement coverage.
- RTD Integration: Includes a Pt100 resistance temperature detector for cold junction compensation, enhancing thermocouple accuracy.
- Digital I/O: 8 TTL-compatible digital input lines and 8 TTL-compatible digital output lines for control and status monitoring.
- Comprehensive Driver Support: Compatible with Basic, C, and Pascal programming environments for easy integration into custom applications.
- Connectivity: Equipped with a 37-pin female D-type connector and a 20-pin auxiliary connector for analog and digital interfacing.
- Compact Form Factor: Dimensions of 155 mm × 99 mm, suitable for standard PC expansion slots.
- Included Accessories: Supplied with a 2 m connection cable and Pt100 sensor for immediate deployment.

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3. Technical Specifications
- Analog Input Channels: 32 single-ended (SE)
- Resolution: 12 bits
- Sampling Rate: 100 samples/second (100 S/s)
- Input Voltage Range: ±5 V nominal
- Programmable Gain Settings: ×1, ×100, ×200, ×250, ×500, ×831, ×1000
- Input Isolation: 500 V DC (input-to-bus isolation)
- Thermocouple Types Supported: J, K, S, T, E, R, B, N
- RTD Sensor: Pt100 (for cold junction compensation)
- Digital I/O: 8 TTL inputs, 8 TTL outputs
- Connectors:
- 37-pin female D-type connector (analog input and control signals)
- 20-pin auxiliary connector (digital I/O and additional functions)
- Dimensions: 155 mm (L) × 99 mm (W)
- Weight: Approx. 200–250 g (typical, without cable)
- Power Requirements: Standard PC bus power (exact current draw dependent on configuration)
- Operating Temperature Range: 0 °C to +50 °C (typical industrial environment)
- Storage Temperature Range: –20 °C to +70 °C
- Humidity: 0–90% RH, non-condensing
- Material: Multi-layer PCB with high-quality insulation and gold-plated connectors for signal integrity
- Cable Length (included): 2 m shielded analog cable

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4. Functionality
The AX5232 functions as a PC-based analog-to-digital interface card, converting analog voltage or temperature signals into digital data for processing, logging, or control applications. Each of the 32 single-ended channels can be configured to measure voltage or thermocouple input, with programmable gain settings allowing adaptation to various signal levels.

The card’s 12-bit A/D converter provides a resolution of 1 part in 4096, enabling accurate representation of analog signals within the ±5 V input range. The 500 V DC isolation barrier between the analog input section and the PC bus ensures that noise, surges, or ground potential differences do not affect system stability or measurement accuracy.

Use Cases and Applications:
- Industrial process monitoring and control
- Laboratory temperature measurement and calibration
- Environmental data logging
- Thermal profiling and material testing
- Embedded PC-based instrumentation systems
- Research and development setups requiring multi-channel temperature acquisition

Compatibility:
The AX5232 is designed for integration with standard PC architectures and supports multiple programming environments, including Basic, C, and Pascal. It can be used with Axiom’s software libraries or integrated into custom data acquisition frameworks.

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5. Components & Accessories
Included Items:
- AX5232 A/D acquisition card
- 2 m shielded analog input cable
- Pt100 RTD sensor for cold junction compensation
- User documentation and driver software (Basic/C/Pascal)

Optional Accessories (available separately):
- Terminal boards for easy signal wiring
- Extended-length shielded cables
- Mounting brackets or DIN-rail adapters
- Additional thermocouple probes (types J, K, S, T, E, R, B, N)
- External calibration modules

Connectors:
- 37-pin D-type female connector: Primary interface for analog input channels and reference signals.
- 20-pin connector: Provides access to digital I/O lines and auxiliary control signals.

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6. Installation & Setup
Requirements:
- Compatible PC with available expansion slot (ISA or PCI variant depending on system configuration)
- Operating system supporting Axiom driver libraries
- Power supply from PC bus (no external power required)

Mounting Options:
The AX5232 is designed for internal installation in a PC chassis. It fits into a standard expansion slot and connects directly to the system bus. The 37-pin and 20-pin connectors are accessible from the rear panel or via breakout cables.

Configuration:
- Install the card into the designated PC slot.
- Connect the provided 2 m cable to the 37-pin D-type connector.
- Attach thermocouple or RTD sensors to the appropriate input terminals.
- Install the driver package and configure channel parameters (gain, input type, sampling rate) using the provided software tools.
- Verify operation through test utilities or custom application code.

Software Setup:
The included drivers support Basic, C, and Pascal programming environments, allowing developers to quickly integrate the card into existing data acquisition systems. Configuration utilities enable channel calibration, gain selection, and thermocouple type assignment.

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7. Performance & Capabilities
Analog Performance:
- 12-bit resolution ensures fine granularity in signal measurement.
- Programmable gain amplifiers allow adaptation to low-level thermocouple signals or higher voltage inputs.
- 100 S/s sampling rate provides adequate temporal resolution for temperature and slow-varying process signals.

Isolation and Noise Immunity:
- 500 V DC isolation protects both the host PC and the measurement circuitry from electrical interference and ground potential differences.
- Shielded cable and PCB design minimize crosstalk and electromagnetic interference (EMI).

Temperature Measurement Accuracy:
- Supports a wide range of thermocouple types, covering temperature spans from cryogenic to high-temperature industrial processes.
- Integrated Pt100 RTD sensor provides accurate cold junction compensation, improving thermocouple measurement precision.

Digital I/O Capabilities:
- 8 TTL inputs and 8 TTL outputs allow integration with control systems, alarms, or external switching devices.
- TTL-level compatibility ensures straightforward interfacing with logic circuits and microcontrollers.

Limitations:
- Sampling rate limited to 100 S/s, making it unsuitable for high-speed dynamic signal acquisition.
- 12-bit resolution may not meet the requirements of ultra-high-precision applications.
- Designed primarily for temperature and low-frequency analog signals rather than high-bandwidth waveforms.

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8. Standards & Compliance
- Electrical Isolation: 500 V DC isolation meets industrial safety and noise immunity standards.
- Signal Compatibility: TTL-level digital I/O conforms to standard logic voltage levels (0–5 V).
- Thermocouple Standards: Supports standard thermocouple types per IEC and ANSI specifications (J, K, S, T, E, R, B, N).
- Environmental Compliance: Designed for operation in typical industrial and laboratory environments.
- Quality Assurance: Manufactured under Axiom’s ISO-certified quality management system.
- Regulatory Compliance: Meets CE and FCC requirements for electromagnetic compatibility (EMC) and safety (depending on region).

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9. Additional Information
Warranty:
Typically supplied with a standard manufacturer’s warranty (1–2 years) covering defects in materials and workmanship under normal operating conditions.

Technical Support:
Axiom provides comprehensive technical support, including driver updates, software libraries, and application notes. Support is available via online resources, documentation, and direct engineering assistance.

Maintenance:
- Periodic calibration recommended for precision temperature measurement applications.
- Keep connectors and cables clean and free from oxidation.
- Ensure adequate ventilation within the PC chassis to maintain stable operating temperature.

Software & Firmware Updates:
Driver and library updates are periodically released by Axiom to ensure compatibility with new operating systems and development environments.

Service & Replacement:
Replacement parts, cables, and sensors are available through Axiom’s authorized distributors.

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### Summary
The Axiom AX5232 PC A/D Card is a robust, isolated, 32-channel analog input module engineered for accurate temperature and low-frequency signal acquisition. With 12-bit resolution, programmable gain, and 500 V DC isolation, it ensures reliable performance in industrial and laboratory environments. Its support for multiple thermocouple types, integrated Pt100 RTD for cold junction compensation, and flexible digital I/O make it a versatile solution for PC-based data acquisition systems. Compact, configurable, and supported by multiple programming environments, the AX5232 delivers a balance of precision, safety, and adaptability for a wide range of measurement and control applications.