DS3800HFPC GE

Parameters

• Input Type: Thermocouple J, K, T (default)

• Channels: 16 differential (fixed, non-expandable)

• Resolution: 14-bit ADC, ±0.1°C accuracy at 25°C ambient

• Cold Junction: Single onboard sensor (non-redundant in this variant)

• Isolation: 1500V RMS channel-to-backplane (lower than HFPB variants)

• Power: +5V DC @ 1.0A only (no +15V required – differs from B variant)

• Scan Rate: 250ms per channel (slower than HFPC’s typical 150ms in newer firmware)

• Mounting: 6U VME Eurocard, single-slot

Advantages & Features

• Lower power consumption (no +15V rail needed) – ideal for legacy cabinets with limited supply

• Simplified cold-junction design reduces component failure points

• Front-panel LEDs for channel status and open-circuit detection

• Compatible with Mark IV backplanes (not VIe without adapter)

• Interchangeable with DS3800HFPB in most applications (check pinout first)

Application Cases

• Exhaust temperature monitoring in Frame 6B gas turbines

• Bearing temperature tracking in Frame 7EA steam turbines

• Retrofit replacements for obsolete DS3800H single-ended boards

• Power plants transitioning from Mark IV to partial Mark VIe upgrades

Competitor Comparison

• vs. DS3800HFPB (B variant): Lower isolation (1500V vs. 2500V) and no redundant CJC, but no +15V requirement

• vs. DS3800HFPB1F1E (coated variant): No conformal coating – less suitable for humid/corrosive sites

• vs. ABB TB711 : More cost-effective, but slower scan rate (250ms vs. 150ms)

• vs. Siemens 7MH410 : Simpler to configure (jumper-based vs. software), but lacks diagnostics

• vs. Woodward 8440-2015 : Better long-term stability, but limited to J/K/T types only

Selection Suggestions

• Verify your backplane does not provide +15V – if it does, consider HFPB variant instead

• Confirm thermocouple type (J/K/T) matches your sensors – no E/S support

• Check if you need redundant cold-junction – if yes, choose HFPB not HFPC

• Ensure scan rate (250ms) meets your turbine’s alarm response requirements

• Purchase with a 12-month warranty for used/refurbished units due to age

Precautions

• Critical: Do not interchange with HFPB without verifying front connector pinout – pin assignments differ

• Use thermocouple-grade extension wire – copper wire will cause inaccurate readings

• Allow 30-minute warm-up before calibration or commissioning

• Do not hot-swap – the backplane requires power-off for insertion/removal

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

• Periodically check cold-junction sensor drift every 2 years (calibrate against ice bath)

• If replacing a failed unit, verify firmware version matches turbine control logic (older revisions may have different linearization tables)