GE DS3800HIMA1B1B

Parameters

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

• Channels: 8 differential (fixed)

• Resolution: 12-bit ADC

• Accuracy: ±0.08% of full scale (improved over A1’s ±0.1%)

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

• Filtering: 50Hz/60Hz noise rejection (B1 feature)

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

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

• Scan Rate: 80ms per channel (B1 optimized, faster than A1’s 100ms)

• Coating: Conformal coating (suffix B) – single-layer acrylic

• Temp Range: 0°C to +60°C

• Mounting: 6U VME Eurocard, single-slot

• Diagnostics: Enhanced LED status per channel (over-range, under-range, open-circuit, and signal noise alert)

Advantages & Features

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

• B1 firmware offers improved accuracy (±0.08%), faster scan (80ms), and built-in 50/60Hz noise filtering – a significant upgrade over A1

• 8 differential channels provide noise rejection for long cable runs in turbine environments

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

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

• Front-panel LEDs for per-channel status including signal noise detection alerts

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

Application Cases

• Turbine inlet guide vane (IGV) position feedback – 4–20mA from LVDT transmitters requiring stable, noise-free readings

• Fuel gas pressure monitoring – 4–20mA transmitters in gas turbine fuel skids where 50/60Hz noise is present

• Steam pressure and flow monitoring – for steam turbine throttle and extraction lines with improved accuracy needs

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

• Retrofit projects upgrading from A1 firmware to B1 for better noise rejection and faster response

Competitor Comparison

• vs. DS3800HIMA1A1B (A1/B variant): Better accuracy (±0.08% vs. ±0.1%), faster scan (80ms vs. 100ms), built-in noise filtering, and signal noise diagnostics – significant upgrade

• vs. DS3800HIMA (standard A variant): Better specifications across the board; B1 is a meaningful improvement

• vs. DS3800HIMA1C1C (C variant): Similar performance, but B coating is basic vs. C’s improved moisture resistance

• vs. DS3800HFPB (thermocouple board): Handles different signal types – HIMA1B1B is for 4–20mA/voltage, not thermocouples

• vs. DS3800HSCB (high-speed analog input): HIMA is standard speed (80ms), HSCB offers faster scanning for dynamic signals

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

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

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

• vs. Honeywell 51304638 : 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 must match your transmitters

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

• Assess if B1’s noise filtering and faster scan rate are beneficial – particularly valuable near VFDs or in electrically noisy environments

• Evaluate environmental conditions – B coating is suitable for clean, dry indoor installations; upgrade to C/D/G/H for more demanding environments

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

• For critical applications, consider used/refurbished units with 90-day warranty or new-old-stock with calibration certificate

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 – B1’s filtering helps but is not a substitute for good wiring practices

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

• B1 firmware offers improved noise rejection – configure jumpers correctly for 50Hz or 60Hz based on your region

• Basic B coating does not protect against humidity or corrosive gases – upgrade to 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 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