SAMSUNG SSAS-PRO SPAI-16 Analog Input Module
SAMSUNG SSAS-PRO SPAI-16 is a 16-channel analog input signal acquisition module engineered for marine engine monitoring, power management, and industrial process control. Operating within the Samsung SSAS-Pro (Ship Automation System Pro) architecture, the SPAI-16 converts continuous analog signals—such as 4–20mA current loops and 0–10V DC voltages from temperature sensors, pressure transmitters, flow meters, and level gauges—into precise digital data for high-speed central CPU processing.
Technical Parameter List
| Specification | Parameter Details |
| Manufacturer / Series | Samsung Heavy Industries / SSAS-Pro Series |
| Model | SPAI-16 (Analog Input Module) |
| Input Channels | 16 Single-Ended / Differential Analog Input Channels |
| Input Signal Types | 4–20mA DC, 0–20mA DC, 0–10V DC, 1–5V DC |
| A/D Conversion Resolution | 16-bit High-Precision Analog-to-Digital Converter |
| Accuracy / Drift | ±0.1% Full Scale (at 25°C) |
| Channel Isolation | Optical isolation (1500V RMS between field logic and bus) |
| Sampling Rate | High-speed multiplexed sampling across all 16 channels |
| Power Supply | 24V DC Field Power Supply |
Product Features & Core Advantages
High Channel Density: Accommodates 16 precision analog inputs in a single compact footprint to conserve panel space.
Superior Noise Immunity: Multi-stage filtering and optical isolation shield analog signals from electromagnetic interference (EMI) and common-mode noise in engine room environments.
Comprehensive Fault Diagnostics: Real-time monitoring detects wire-break events (e.g., current loop dropping below 3.8mA), over-range signals, and sensor short circuits.
High-Precision A/D Conversion: 16-bit processing delivers fine measurement granularity for critical process monitoring like fuel pressure and bearing temperature.
SPAI-16
Model Classification
SSAS-Pro Analog & Control Series:
SPAI-16: 16-Channel Analog Input Module
SPAI-6: 6-Channel High-Speed Analog Input Module
SPAO-8: 8-Channel Analog Output Module (4–20mA / 0–10V)
SPRI-16: 16-Channel RTD Temperature Input Module
SPDI-16 / SPDI-24: Digital Input Signal Modules
SPDO-16 / SPRDO-16: Transistor & Relay Digital Output Modules
Environmental Tolerance Conditions
Operating Temperature: -15°C to +55°C
Storage Temperature: -25°C to +70°C
Relative Humidity: Up to 95% (non-condensing)
Vibration & Shock: Built to comply with major marine classification society standards (DNV, ABS, LR, KR) for high-vibration shipboard machinery spaces.
Installation Method
Backplane / DIN Rail Mounting: Latch the module securely onto the 35mm panel DIN rail or designated SSAS-Pro rack slot. Verify system grounding connections.
Signal Wiring: Connect 4–20mA current loop or 0–10V sensor cables to the channel terminals, ensuring proper shield grounding at a single point.
Bus Interface: Attach the primary and secondary redundant communication bus cables to connect the SPAI-16 to the main controller.
Supply Voltage Check: Confirm 24V DC loop power voltage and correct polarity before powering on the system.
Operating Instructions
Input Type Setup: Configure channel input types (current vs. voltage) via module DIP switches or software settings prior to wiring sensors.
System Calibration: Perform zero and span calibration during initial commissioning to compensate for long cable run resistance.
Status Monitoring: Monitor LED indicators during startup. Steady green status indicates normal bus and channel operation; flashing amber/red alerts signal sensor loop fault or wire break.