SAMSUNG SSAS-PRO SPRI-16 RTD Temperature Input Module
SAMSUNG SSAS-PRO SPRI-16 is a high-precision 16-channel Resistance Temperature Detector (RTD) input module engineered for continuous temperature monitoring in marine engine rooms, power distribution systems, and industrial processing plants.
Designed as an integral analog acquisition unit within the Samsung SSAS-Pro (Ship Automation System Pro) architecture, the SPRI-16 measures resistance changes across 2-wire, 3-wire, or 4-wire RTD sensors (such as Pt100) and converts them into digitized temperature readings for central CPU processing and alarm logging.
Technical Parameter List
| Specification | Parameter Details |
| Manufacturer / Series | Samsung Heavy Industries / SSAS-Pro Automation Series |
| Model | SPRI-16 (RTD Temperature Input Module) |
| Input Channels | 16 Dedicated RTD Input Channels |
| Supported Sensor Types | Pt100, Pt1000, Ni120, Cu50 (2-wire, 3-wire, or 4-wire configuration) |
| Temperature Range | -200°C to +850°C (Sensor dependent) |
| A/D Conversion Resolution | 16-bit High-Precision ADC |
| Measurement Accuracy | ±0.1°C / ±0.1% Full Scale (at 25°C ambient) |
| Lead Wire Compensation | Built-in automatic lead wire resistance compensation (3-wire / 4-wire) |
| Isolation Rating | Optical isolation (1500V RMS between field sensor terminals and system bus) |
| Power Supply | 24V DC Field Power Supply |
Product Features & Core Advantages
16-Channel High Density: Collects thermal data from up to 16 separate RTD sensors within a single compact module, maximizing cabinet space efficiency.
Line Resistance Compensation: Advanced 3-wire and 4-wire balance circuitry automatically eliminates temperature measurement errors caused by long sensor cable runs.
Sensor Diagnostics & Wire-Break Detection: Built-in loop diagnostics instantly detect open-circuit (broken sensor cable), short-circuit, or out-of-range temperature faults per channel.
Exceptional EMI / Noise Filtering: Built-in hardware and digital low-pass filters protect temperature signals from high-voltage motor drives and electromagnetic interference common in machinery spaces.
Model Classification
SSAS-Pro Temperature & Analog Acquisition Series:
SPRI-16: 16-Channel RTD Temperature Input Module
SPAI-16 / SPAI-6: 16-Channel / 6-Channel Analog Input Modules (4–20mA / 0–10V)
SPAO-8: 8-Channel Analog Output Module (4–20mA / 0–10V)
SPDI-16 / SPDI-24: 16-Channel / 24-Channel Digital Input Modules
SPDO-16 / SPRDO-16: Transistor & Relay Digital Output Modules
RSPC-X32: Central Processing CPU Controller Unit
Environmental Tolerance Conditions
Operating Temperature: -15°C to +55°C
Storage Temperature: -25°C to +70°C
Relative Humidity: 5% to 95% (non-condensing)
Vibration & Shock: Certified under major marine classification standards (DNV, ABS, LR, KR, NK) for heavy-vibration shipboard engine room installation.
Installation Method
Rack / DIN Rail Mounting: Latch the SPRI-16 securely onto a standard 35mm DIN rail or SSAS-Pro backplane rack slot inside an IP-rated enclosure.
Sensor Wiring: Connect Pt100/Pt1000 field wires to the terminal block. Use shielded, twisted-pair cables and connect 3-wire/4-wire setups according to the channel terminal pinout diagram.
Shield Grounding: Connect sensor cable shields to the dedicated ground bus bar at a single point to prevent ground loops.
Bus Interconnect: Plug in the primary and redundant communication bus cables linking the module to the central processor.
Operating Instructions
Sensor Type Selection: Configure sensor types (e.g., Pt100 vs. Pt1000) and wiring mode (2. 3. or 4-wire) via hardware DIP switches or software parameters prior to energizing.
Lead Line Balancing: Ensure 3-wire conductors have matching resistance and length for precise automatic line compensation.
Status Monitoring: Observe front-panel status LEDs during boot-up. Steady green indicates normal sensor loop and bus communication; blinking red/amber indicates a sensor open-circuit or wire-break fault.