DS3800HITA GE

Parameters

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

• Channels: 4 differential (standard) or 8 single-ended (configurable)

• Resolution: 12-bit ADC

• Accuracy: ±0.1% of full scale

• Sampling Rate: Up to 1kHz per channel (high-speed capability)

• Scan Rate: 1ms per channel (significantly faster than HIMA’s 100ms)

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

• Filtering: Programmable low-pass filter (anti-aliasing)

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

• Power: +5V DC @ 0.9A, +15V DC @ 0.25A (requires both rails)

• 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

• High-speed sampling (1kHz) captures fast-changing signals for real-time turbine protection

• Programmable filtering allows customization for vibration, speed, or pressure signals

• 4–8 channel flexibility – configurable as differential (4) or single-ended (8) via jumpers

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

• Basic A-grade coating provides light moisture and dust protection for indoor installations

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

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

Application Cases

• Turbine shaft vibration monitoring – high-speed 4–20mA signals from proximity probes

• Overspeed detection – dynamic speed signals requiring sub-10ms response times

• Dynamic pressure monitoring – fast-changing combustion pressure signals

• Thrust position monitoring – high-speed LVDT feedback for axial position

• Retrofit projects replacing obsolete high-speed analog boards in Mark IV systems

Competitor Comparison

• vs. DS3800HIMA (standard analog input): Significantly faster sampling (1ms vs. 100ms) – HITA is for dynamic signals, HIMA for steady-state monitoring

• vs. DS3800HIMB (standard analog input): HITA offers high-speed capability but fewer channels (4 differential vs. 8 differential on HIMB)

• vs. DS3800HSCB (high-speed analog): Similar high-speed capability; HITA may have different filtering or channel configuration

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

• vs. ABB TB711 : ABB offers higher resolution (14-bit), but HITA offers higher sampling rate (1kHz vs. typically 100Hz on ABB)

• vs. Siemens 7MH410 : Siemens offers HART protocol support, but GE HITA offers higher-speed sampling

• vs. Woodward 8440-2015 : Woodward offers more flexible configuration, but GE HITA provides higher-speed capability

• vs. Bently Nevada 3500/42 : Bently is vibration-dedicated; HITA is a general-purpose high-speed analog input that can accept vibration signals but lacks specialized vibration processing

Selection Suggestions

• Critical: Confirm required sampling rate – HITA supports up to 1kHz; ensure this meets your dynamic signal requirements

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

• Assess channel count – 4 differential channels may be sufficient for vibration/speed monitoring

• Determine whether differential or single-ended wiring is needed for your sensors

• Evaluate environmental conditions – A coating is suitable for clean, dry indoor installations; upgrade to B/C/D/G/H if needed

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

• For critical protection 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: High-speed sampling generates more data – ensure the backplane and processor can handle the data throughput

• Critical: Use shielded twisted-pair cables for all analog inputs to avoid EMI – high-speed signals are particularly susceptible to noise

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

• Programmable filtering must be set correctly to avoid aliasing – consult the turbine control logic requirements

• Basic A coating does not protect against humidity or corrosive gases – upgrade to B/C/D/G/H if your environment has moisture or chemicals

• Allow 30-minute warm-up before calibration

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

• Periodically verify channel calibration every 1 year (high-speed applications may require more frequent verification)

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

• If replacing a similar high-speed board, verify pinout compatibility – HITA may differ from HSCB or other high-speed series in wiring assignments