GE DS3800HFPB

Parameters

• Input Type: Thermocouple (J, K, T, E, S) or ±100mV DC

• Channels: 16 differential (expandable to 24 via jumper)

• Resolution: 14-bit ADC with 0.1°C accuracy

• Cold Junction: Onboard reference sensor with ±0.5°C compensation

• Isolation: 2500V RMS channel-to-backplane

• Power: +5V DC @ 1.2A, +15V DC @ 0.3A

• Mounting: VME 6U single-slot Eurocard

Advantages & Features

• Factory-calibrated linearization for 5 thermocouple types

• Built-in open-circuit detection with LED alarm per channel

• Filtered inputs for high-EMI turbine environments

• Hot-swappable with Mark IV and VIe backplanes

• Redundant cold-junction sensors for fail-safe operation

Application Cases

• Gas turbine exhaust temperature monitoring (EGT)

• Steam turbine bearing and winding temperature tracking

• Generator stator thermocouple arrays

• Upgrading older DS3800H single-ended boards to differential inputs

Competitor Comparison

• vs. ABB TB711 thermocouple modules: Higher channel density, but slower scan rate (500ms vs. 200ms)

• vs. Siemens 7MH series: More robust EMI filtering, but lacks HART protocol support

• vs. Woodward 8440-2015 : Lower cost per channel, but requires external CJC reference

• vs. Honeywell 51304638 : Better long-term drift performance (±0.05% vs. ±0.1%)

Selection Suggestions

• Verify thermocouple type matches your sensors (J/K/T default, E/S optional)

• Confirm firmware revision supports 24-channel mode (check jumper JP3)

• Ensure backplane slot provides +15V DC (not all Mark IV slots do)

• Order with mating front connector kit (p/n 531X180SPAANG1)

Precautions

• Do not connect active 4–20mA signals – this is millivolt-only

• Use thermocouple-grade extension wire (no copper splices)

• Allow 30-minute warm-up before calibration

• Store with anti-static foam covering the edge connector

• Replace CJC battery (CR2032) every 5 years to maintain reference accuracY