SAMSUNG SMDO-8 Digital Output Module (8CH)
SAMSUNG SMDO-8 is an 8-channel digital output expansion module engineered for SAMSUNG industrial PLC systems. It receives internal control signals from the central processing unit and drives field actuators such as relays, solenoid valves, contactors, and visual indicator lamps, ensuring reliable and precise real-time automation control.
Technical Table
| Parameter | Technical Standard / Specification |
| Model | SAMSUNG SMDO-8 |
| Output Channels | 8 isolated digital channels |
| Output Type | Transistor / Relay output (model variant dependent) |
| Rated Load Voltage | 24V DC / 120V–240V AC (Relay variant) |
| Maximum Load Current | 0.5A per channel (Transistor) / 2.0A per channel (Relay) |
| Isolation Protection | Optocoupler galvanic isolation between system bus and load |
| Response Time | OFF → ON: < 1 ms / ON → OFF: < 1 ms (Transistor) |
| Status Indicators | 8 LED channel indicators for real-time output monitoring |
Environmental Tolerance Conditions
Operating Temperature: 0°C to 55°C (32°F to 131°F)
Relative Humidity: 5% to 95% RH (non-condensing)
Vibration Resistance: Compliant with IEC 60068-2-6 standard (10–55 Hz)
Electromagnetic Compatibility: Meets IEC 61000-4 series for industrial noise immunity
Operating Instructions
Always disconnect main power supply prior to installing, wiring, or removing the module from the backplane.
Ensure load voltages and currents remain strictly within specified electrical parameters to prevent thermal damage.
Use surge suppressors or flyback diodes across inductive loads (e.g., solenoid coils) to absorb voltage spikes during switching.
Keep field output wiring separated from high-voltage power lines and sensitive input signal lines.
Fault Diagnosis
Channel LED Off (Signal Active): Check for broken field wiring, improper power supply connection, or a blown internal protective fuse.
Overcurrent / Short Circuit Flag: Verify that the connected actuator load does not exceed the maximum current rating per channel.
Intermittent Switching: Inspect terminal block tightness and check for electrical interference along the field wiring route.
Related Models of the Same Series
SAMSUNG SMDO-16: High-density 16-channel digital output module.
SAMSUNG SMDI-8: Matching 8-channel digital input module (24V DC).
SAMSUNG SMDI-16: High-density 16-channel digital input module.
SAMSUNG SMCPU-08: Central processing unit module for system execution.
Storage Conditions
Storage Temperature: -25°C to 70°C (-13°F to 158°F)
Storage Humidity: 5% to 95% RH (non-condensing)
Environment: Store in an anti-static, clean, dry environment free from corrosive gases, moisture, and direct sunlight.