Samsung SSAS21-AI Analog Input Module

Samsung SSAS21-AI Analog Input Module is a high-precision signal acquisition module engineered for the Samsung SSAS21 programmable logic controller (PLC) platform. It accurately samples, filters, and converts continuous industrial analog signals—such as 4–20mA current loops and 0–10V voltage levels—into digital values for real-time CPU processing. Designed for demanding automation environments, the module protects internal control logic with robust channel isolation while delivering stable data for critical process loops.

Application Cases

Chemical & Process Monitoring: Reads continuous signals from pressure transmitters, flow sensors, and level gauges across chemical processing lines.

Thermal & Power Plant Control: Captures voltage and current signals from temperature transmitters and power monitoring units for real-time thermal regulation.

Water & Wastewater Infrastructure: Interfaces with remote tank level transmitters, pH probes, and pump flow meters to enable automated water distribution control.

Motion & Conveyor Systems: Monitors analog sensor feedback (positioning, tension, and velocity) to maintain continuous speed control across manufacturing lines.

Product Advantages and Features

High Resolution & Precision Conversion: High-bit analog-to-digital conversion ensures micro-level signal fidelity across diverse measurement ranges.

Optocoupler & Galvanic Isolation: 1500V AC isolation barrier shields controller backplane electronics from high-voltage spikes, EMI, and ground loops.

Flexible Input Signal Range: Supports multi-channel software/hardware configuration for standard 4–20mA DC, 0–5V DC, and 0–10V DC input ranges.

Fast Sampling Rate: Multi-channel parallel/sequential scanning provides ultra-fast response times for dynamic closed-loop control applications.

On-Board Diagnostics: Features continuous self-diagnostic routines to detect out-of-range inputs, sensor open-circuit conditions, and power faults.

Other Models in the Same Series

Installation and Maintenance

Rack Mounting: Turn off main system power. Slide the SSAS21-AI module into the designated slot on the SSAS21 base chassis until the rear multi-pin connector snaps firmly into the backplane, then tighten retention screws.

Shielded Cable Connection: Connect field sensor wiring using twisted-pair shielded cables. Ground the shield at the terminal board end only to eliminate potential ground loop currents.

Signal Calibration: Use standard loop calibrators during annual scheduled maintenance turnarounds to verify zero and span channel accuracy.

Dust & Moisture Control: Ensure panel ventilation slots are free from dust buildup to maintain passive cooling efficiency inside the IP54 enclosure.