GE DS200TCQAG2B

Technical Parameters

Manufacturer: GE
Series: Mark V / Mark VIe
Channels: 16 differential
Input Range: -10 mV to +100 mV (Type J/K/T/E)
Cold Junction: Single onboard sensor with enhanced linearization and thermal isolation
Isolation: 1500V AC
Accuracy: ±0.08% at 25°C, ±0.15% across full temperature range
Sampling: 10 Hz sequential
Operating Temp: -30°C to +70°C
Storage Temp: -40°C to +85°C
Mounting: VME rack
Suffix “G2B”: High accuracy + advanced diagnostics (drift, degradation, sense-lead) + G2 wiring configuration (different channel-to-terminal mapping than G1) + extended upper temperature (70°C) + standard conformal coating

Key Features

High accuracy – ±0.08% for critical temperature monitoring
Advanced diagnostics – drift monitoring, degradation prediction, sense-lead integrity, and open/short detection
Extended upper temperature limit – operates up to 70°C, suitable for hotter cabinets
G2-specific wiring configuration – unique channel-to-terminal mapping matching specific GE cabinet wiring standards; direct drop-in for G2-configured systems
Faster sampling – 10 Hz for responsive monitoring
Improved cold-junction compensation – stable readings across ambient variations
Simple swap – no firmware changes required in most Mark V systems
LED status per channel + board health with diagnostic indicators
Standard conformal coating for moisture/dust resistance
Backward compatible with Mark V and Mark VIe (hot-swap only on VIe Rev D+)

Applications

Legacy gas turbine retrofits with G2 wiring – where existing field wiring uses G2 terminal assignments and high accuracy with diagnostics is required
Steam turbine bearing monitoring in G2 cabinets – critical protection with drift anticipation
Pipeline compressor stations with G2-configured cabinets – precision monitoring with predictive maintenance
Industrial cogeneration plants – where OEM specified G2 wiring for thermocouple terminations
Facilities with G2-standard cabinets requiring diagnostic insights

Comparison with Competitors

Selection Tips

Choose the DS200TCQAG2B only if your cabinet uses G2 wiring configuration and you require high accuracy (±0.08%) with advanced diagnostics – this board combines precision, predictive maintenance, and G2 pinout compatibility
For G2 systems with high accuracy but no diagnostics, consider DS200TCEAG2B
For G2 systems with basic accuracy without diagnostics, the DS200TCDAG2B is more economical
For G1 systems requiring the same features, use the DS200TCQAG1B
If you are rewiring the cabinet, consider converting to G1 and using DS200TCQAG1B or DS200TCDAG1ADA
Verify existing wiring pinout against G2 standard – using the wrong terminal block or miswiring will scramble channel readings
Source refurbished units with G2 pinout verification and diagnostic test validation in the test report

Precautions

ESD sensitive – use wrist strap
Power down for Mark V removal (no hot-swap)
Torque terminals to 0.5 N·m max
Do not exceed -30°C to +70°C operating range – exceeding 70°C reduces component life
Pinout critical – G2 mapping differs from G1; verify cabinet wiring before installation
Calibrate every 24 months – diagnostics and accuracy depend on a valid baseline calibration
Ground shields only at the board end
Verify thermocouple type – optimized for J/K (T/E reduces accuracy to ±0.15%)
Monitor diagnostic logs – drift warnings indicate sensor aging; plan proactive replacement
Label clearly – mark board and slot as “TCQAG2B – DIAG/EXT TEMP/G2” to ensure proper handling and prevent future miswiring with G1 boards
Do not mix G1 and G2 boards without verifying terminal block compatibility in the same rack
Monitor cabinet temperature – if consistently near 70°C, consider cooling improvements or upgrade to wider-range variants if needed