DS3800HIOD GE

Parameters

• Analog Inputs: 4 channels, 4–20mA (default) or 0–10V DC (jumper-configurable)

• Analog Outputs: 8 channels, 4–20mA (default) or 0–10V DC (jumper-configurable)

• Resolution: 12-bit ADC (inputs) / 12-bit DAC (outputs)

• Accuracy: ±0.1% of full scale

• Input Impedance: 250Ω (current) / >1MΩ (voltage)

• Output Drive: 4–20mA into 750Ω max / 0–10V into 5kΩ min

• Isolation: 1500V RMS optical isolation (channel-to-backplane)

• Power: +5V DC @ 1.0A, +15V DC @ 0.35A (higher due to more output channels)

• Scan/Update Rate: 100ms (inputs) / 100ms (outputs)

• Coating: Basic conformal coating (suffix D – single-layer acrylic, though note D typically indicates improved coating in other series; verify actual coating level with supplier)

• Temp Range: 0°C to +60°C (or extended if D indicates enhanced coating)

• Mounting: 6U VME Eurocard, single-slot

• Diagnostics: Enhanced LED status per channel (input over-range/under-range, output fault/open-circuit, load monitoring)

Advantages & Features

• Higher output density – 8 analog outputs + 4 analog inputs on a single board, providing more actuation channels than HIOA (4 in/4 out) and HIOB (8 in/4 out)

• Hybrid I/O capability – combines inputs and outputs on one board, saving cabinet space

• Versatile signal support – inputs and outputs independently configurable for 4–20mA or 0–10V, compatible with most industrial actuators and transmitters

• Enhanced output diagnostics – load monitoring and fault detection on each output channel

• Isolated channels reduce ground loop interference and protect the backplane from field wiring faults

• D-grade coating (if applicable) provides improved moisture resistance over basic coatings

• Compatible with Mark IV backplanes and some VIe systems (with adapter)

• Front-panel LEDs for per-channel status including output load faults

Application Cases

• Multi-actuator control systems – controlling multiple turbine valves (IGV, fuel, steam, bypass) with fewer input channels

• Fuel gas pressure and flow control – multiple control valve positioners with limited feedback sensors

• Steam pressure, flow, and temperature control – multiple valve positioners for throttle, extraction, and reheat lines

• Lube oil temperature and cooling control – multiple cooling water or bypass valve actuators

• Retrofit projects replacing separate input and output boards where more outputs than inputs are needed

Competitor Comparison

• vs. DS3800HIOA (A variant): More outputs (8 vs. 4) with same 4 inputs – HIOD offers greater output density

• vs. DS3800HIOB (B variant): More outputs (8 vs. 4) but fewer inputs (4 vs. 8) – HIOD is output-heavy, HIOB is input-heavy

• vs. DS3800HOMB (output-only): HIOD offers inputs in addition to outputs, but fewer total outputs (8 vs. typically 16 on output-only boards)

• vs. DS3800HIMA (input-only): HIOD offers outputs in addition to inputs, but fewer total inputs (4 vs. 8 differential)

• vs. DS3800HSCB (high-speed analog): HIOD is standard speed (100ms), HSCB offers faster scanning for dynamic signals

• vs. ABB TB711 : ABB offers higher resolution (14-bit) and PROFIBUS/Modbus communication, but lacks hybrid I/O on a single board

• vs. Siemens 7MH410 : Siemens offers HART protocol support on some variants, but GE HIOD offers hybrid I/O in one slot

• vs. Woodward 8440-2015 : Woodward offers more flexible configuration software, but GE HIOD provides a compact hybrid solution

• vs. Honeywell 51304638 : Honeywell offers better long-term stability (±0.05%), but GE HIOD combines inputs and outputs with output load monitoring

Selection Suggestions

• Critical: Confirm input and output signal types (4–20mA or 0–10V) before installation – jumpers must match your transmitters and actuators

• Verify your backplane provides both +5V and +15V with sufficient current capacity (+5V @ 1.0A, +15V @ 0.35A)

• Assess channel mix – this board is ideal for applications requiring more actuator outputs than sensor inputs

• Determine accuracy requirement – 0.1% is sufficient for most turbine control loops

• Evaluate environmental conditions – verify the actual coating level for the “D” suffix (may be basic or enhanced depending on revision)

• Order mating front connector (p/n may vary – confirm with GE)

• For critical applications, consider used/refurbished units with 90-day warranty

Precautions

• Critical: Do not exceed 30mA or ±30V on input channels – overvoltage may damage the ADC and isolation circuits

• Critical: Do not short-circuit output channels – outputs are protected but prolonged shorts may cause damage

• Critical: Monitor output load – outputs are rated for specific loads; exceeding the rating may cause overheating or failure

• Critical: Use shielded twisted-pair cables for all analog inputs and outputs to avoid EMI – especially near VFDs or large transformers

• Ensure field power supply (+24V DC) for loop-powered transmitters is stable (if used)

• Verify the actual coating level for the “D” suffix – in some series D indicates enhanced coating, in others it may be basic; confirm with supplier documentation

• Allow 30-minute warm-up before calibration

• Store in ESD-safe packaging – edge connector is static-sensitive

• Periodically verify input and output calibration every 2 years against a certified reference

• Do not hot-swap – Mark IV backplanes require power-off for insertion/removal

• If replacing separate input and output boards, verify wiring and pinout compatibility – HIOD may differ from HIOA/HIOB series in pin assignments