GE DS3800HIMA

Parameters

• Input Type: 4–20mA (default), 0–10V DC, ±10V DC (configurable)

• Channels: 8 differential (standard) or 16 single-ended

• Resolution: 12-bit ADC (standard)

• Accuracy: ±0.1% of full scale

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

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

• Power: +5V DC @ 0.8A, +15V DC @ 0.2A (requires both rails)

• Scan Rate: 100ms per channel (standard)

• Coating: Basic conformal coating (suffix A – single-layer acrylic)

• Temp Range: 0°C to +60°C

• Mounting: 6U VME Eurocard, single-slot

• Diagnostics: LED status per channel (over-range, under-range, open circuit)

Advantages & Features

• Versatile input support – accepts 4–20mA, 0–10V, or ±10V signals, compatible with most industrial transmitters

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

• Simple configuration – input type selected via jumpers (no complex software setup)

• Reliable 12-bit resolution sufficient for most turbine monitoring applications (pressure, flow, position)

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

• Front-panel LEDs for per-channel status (over-range, under-range, open-circuit)

• Lower channel count (8–16) ensures stable performance without overloading the backplane

Application Cases

• Turbine inlet guide vane (IGV) position feedback – 4–20mA from linear variable differential transformers (LVDTs)

• Fuel gas pressure monitoring – 4–20mA transmitters in gas turbine fuel skids

• Steam pressure and flow monitoring – for steam turbine throttle and extraction lines

• Lube oil pressure and temperature – from standard 4–20mA transmitters on bearing and sump systems

• Retrofit projects replacing obsolete GE DS3800H series analog boards

Competitor Comparison

• vs. DS3800HIMB (B variant): Similar specifications; B variant may have slightly different channel configuration or firmware

• vs. DS3800HFPB (thermocouple board): Handles different signal types – HIMA is for 4–20mA/voltage, while HFP is for thermocouples

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

• vs. ABB TB711 (ABB analog input): Similar channel count, but ABB offers higher resolution (14-bit) and PROFIBUS/Modbus communication

• vs. Siemens 7MH410 (Siemens analog input): Similar functionality, but Siemens offers HART protocol support on some variants

• vs. Woodward 8440-2015 (Woodward analog module): Similar channel count, but Woodward offers more flexible configuration software

• vs. Honeywell 51304638 (Honeywell analog board): Similar channel count, but Honeywell offers better long-term stability (±0.05%)

Selection Suggestions

• Critical: Confirm input signal type (4–20mA, 0–10V, or ±10V) before installation – jumper settings vary

• Verify your backplane provides both +5V and +15V – this board requires both rails

• Assess channel count – 8 differential channels cover most pressure, flow, and position feedback needs

• Determine accuracy requirement – 0.1% is sufficient for most turbine process variables

• Evaluate environmental conditions – basic coating (A) is for clean, dry indoor installations

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

• Ensure field power supply (+24V DC) for 2-wire transmitters is stable (if loop-powered)

• Basic coating (A) does not protect against humidity or corrosive gases – upgrade to C/D/G/H if needed

• Allow 30-minute warm-up before calibration

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

• Periodically verify channel calibration every 2 years against a certified reference

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

• If replacing a similar board, confirm pinout compatibility – HIMA series may differ from HFP or HHR series in wiring assignments