SAMSUNG SSAS-PRO SPAO-8 Analog Output Module



SAMSUNG SSAS-PRO SPAO-8 is an 8-channel precision analog output module designed for marine engine control, power management systems, and heavy industrial process automation.

Operating as a core output interface within the Samsung SSAS-Pro (Ship Automation System Pro) architecture,

the SPAO-8 converts digital control commands from central processor units into precise, continuous analog control signals (4–20mA current loops or 0–10V DC voltage outputs).

It drives field control elements such as proportional control valves, speed governors, variable frequency drives (VFDs), positioners, and panel meters with high speed and high accuracy.

Technical Table

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 Resistance: Certified to major marine classification society requirements (DNV, ABS, LR, KR, NK) for high-vibration shipboard machinery rooms.

Electromagnetic Compatibility (EMC): Heavy industrial noise immunity against electromagnetic spikes, RF interference, and static discharges.

Operating Instructions

Output Mode Configuration: Set DIP switches or software settings for each channel to select between 4–20mA current mode or 0–10V DC voltage mode prior to field wiring.

Mounting & Grounding: Latch the module firmly onto the panel 35mm DIN rail or backplane rack. Ensure the grounding clip makes direct metallic contact with the grounded mounting plate.

Field Cable Wiring: Connect control cables (such as shielded twisted pair) to target actuators. Ground cable shielding at one point only to prevent ground loop noise.

Commissioning & Zero/Span Calibration: Apply 24V DC auxiliary power and run zero-point and full-scale calibration through the controller interface to compensate for line resistance.

Fault Diagnosis

Current Loop Open Circuit Alarm: Triggered when a 4–20mA output channel detects an open loop or disconnected cable wiring. Check field connections and actuator load resistance.

Module Power Supply LED Off: Indicates loss of external 24V DC field supply voltage or blown internal power protection fuse.

System Bus Communication Alarm: Indicates loose ribbon/Ethernet bus connections between the SPAO-8 and the primary CPU frame.

Output Signal Drift / Inaccuracy: Check for ambient temperatures exceeding +55°C, poor shield grounding, or field interference from unshielded high-voltage power lines.

Related Models of the Same Series

SPAI-16 / SPAI-6: 16-Channel / 6-Channel Analog Input Modules (4–20mA / 0–10V)

SPRI-16: 16-Channel RTD Temperature Signal Input Module

SPDI-16 / SPDI-24: 16-Channel / 24-Channel Digital Input Modules

SPDO-16 / SPDO-24: Transistor Digital Output Modules

SPRDO-16: Relay Digital Output Module

RSPC-X32: SSAS-Pro Central Processing Controller Unit

Storage Conditions

Store the module inside its original anti-static bag in a clean, dust-free environment.

Maintain ambient storage temperatures between -25°C and +70°C with non-condensing relative humidity below 95%.

Protect from direct sunlight, corrosive airborne chemicals, salt spray, and extreme mechanical vibration or shock.