SAC IOP313 Analog Input Module

The SAC IOP313 is a high-precision analog input module designed for process control and industrial automation systems. With 8 independently configurable channels, the module accepts standard 4-20 mA current loops or 0-10 V voltage signals, converting them to digital values with 16-bit resolution for accurate monitoring of pressure, temperature, flow, and level transmitters.

High-Precision Measurement

The IOP313 utilizes a 24-bit sigma-delta ADC with programmable gain and filtering to achieve outstanding noise rejection and accuracy. The module's built-in cold junction compensation and linearization for thermocouples (with optional external CJC) allow direct connection of temperature sensors. Each channel can be individually configured for different input types and ranges, making the module highly versatile for mixed-signal applications.

HART Communication Integration

A key feature of the IOP313 is its integrated HART pass-through on all 8 channels. This allows the module to communicate with HART-enabled smart transmitters for device configuration, diagnostic data retrieval, and process variable readback without additional hardware. The HART communication is transparent to the main controller, accessible via Modbus TCP, enabling remote asset management and predictive maintenance.

Diagnostics and Reliability

The module includes comprehensive diagnostic functions: open-circuit detection for 4-20 mA loops, over-range and under-range detection, and power supply monitoring. A built-in watchdog timer ensures the module resets automatically in case of communication loss or internal fault. The industrial-grade design with conformal coating protects against humidity, dust, and corrosion, making the IOP313 suitable for chemical plants, refineries, and outdoor installations.

Application Domains

The IOP313 is ideal for process industries including oil and gas, chemical, pharmaceutical, food and beverage, and water/wastewater treatment. It is also used in test and measurement systems, environmental monitoring, and laboratory automation where high-accuracy analog signal acquisition is required.