SAMSUNG SSAS-PRO SPRDO-16 Relay digital output module
SAMSUNG SSAS-PRO SPRDO-16 is a heavy-duty 16-channel relay digital output module designed for high-reliability marine automation and critical industrial control systems.
Operating within the Samsung SSAS-Pro framework, the SPRDO-16 provides galvanically isolated relay contact outputs (dry contacts) to control high-power field actuators, alarm sirens, motor starters, and solenoid valves.
Unlike transistor modules, its mechanical relay contacts support flexible AC/DC load voltages and high load currents while offering total electrical isolation between control logic and high-voltage field equipment.
Application Cases
Shipboard Machinery & Motor Control: Directly switches contactors, pumps, ventilation fans, and motor starters across marine engine rooms.
Safety & Alarm Actuation: Triggers high-power visual strobes, audible alarm horns, and general emergency alarm systems on commercial vessels.
Power Management Systems (PMS): Controls breaker trip circuits, generator synchronization relays, and load-shedding switchgear.
Auxiliary Valve Actuation: Controls solenoid-driven hydraulic and pneumatic valves for ballasting, cargo handling, and fuel oil transfer.
Product Advantages and Features
SPRDO-16
Galvanic Isolation: Electromechanical relay contacts provide complete electrical isolation between internal system electronics and external field circuits.
Versatile Load Handling: Supports both AC and DC load switching across varying voltage levels without requiring external signal converters.
High Load Capacity: Rated for higher switching currents per channel compared to standard solid-state transistor output modules.
Visual Diagnostics: Features individual front-panel LED indicators for real-time visual monitoring of relay contact activation.
Marine-Grade Durability: Built to withstand constant vibration, wide temperature swings, and harsh atmospheric salt spray in engine room environments.
Other Models in the Same Series
| Model Code | Module Type | Primary Function |
| SPDO-16 / SPDO-24 | Transistor Digital Output | Solid-State Switching for Low-Power DC Loads |
| SPDI-16 / SPDI-24 | Digital Input Module | 16/24-Channel Discrete Sensor Signal Processing |
| SPAI-16 / SPAI-6 | Analog Input Module | Process Signal Acquisition (4–20mA / 0–10V) |
| SPAO-8 | Analog Output Module | Actuator & Valve Positioning Control |
| SPRI-16 | RTD Input Module | PT100 Temperature Sensor Interface |
| RSPC-X32 | System CPU Unit | SSAS-Pro Central Automation Processor |
Installation and Maintenance
DIN Rail Mounting: Latch the module securely onto the standard 35mm panel DIN rail or SSAS-Pro mounting rack.
Terminal Wiring: Wire field loads to the designated relay terminal pins. Ensure operating voltages and load currents remain within the rated relay contact specifications.
Surge Suppression: For inductive loads (e.g., solenoids, contactors), install RC snubbers (for AC loads) or freewheeling diodes (for DC loads) across the load to prevent contact arcing.
Routine Maintenance: Periodically check terminal screws for tightness due to engine vibration. Inspect relay contacts for wear if switching high-frequency or inductive loads.