DS3800DPSS1C1C GE

Technical Specifications

• Input: 120VAC or 125VDC (jumper-selectable)

• Outputs: +5V @ 30A, +15V @ 6A, -15V @ 4A, isolated +24V @ 3A

• Analog Channels: 16 differential, configurable for J/K/T/E/N/R/S thermocouples, Pt100 RTD, 0-10V, or 4-20mA

• Isolation: 2500Vrms reinforced

• Filtering: Hardware-selectable 2Hz to 1kHz, >80dB 50/60Hz rejection

• Temperature Range: -40°C to +85°C (derate +5V to 25A above 70°C)

• Diagnostics: Per-channel LEDs + isolated relay contact for input voltage alarm

Key Features & Advantages

• Higher Output Capacity: 30A on +5V rail (vs. 25A on earlier revisions) supports larger racks.

• Expanded Thermocouple Support: Adds Types R and S for high-temperature gas turbines (7HA/9HA series).

• Improved Efficiency: Switching regulators reduce heat dissipation by ~30% compared to older revisions.

• Enhanced Noise Rejection: >80dB notch filter eliminates 50/60Hz interference from VFDs and large motors.

• Remote Alarm Output: Isolated relay contact provides early warning of input voltage drop.

• Conformal Coating: Standard protection for moisture and corrosive environments.

Typical Application Cases

• Gas Turbine Exhaust Monitoring: Conditions Type R/S thermocouples for high-firing-temperature turbines (7HA/9HA).

• Steam Turbine Bearing Protection: Conditions 4-20mA signals from thrust bearing temperature and position sensors.

• Compressor Surge Detection: Reads dynamic pressure transducers at 1kHz for rapid surge prevention.

• Offshore Platforms: Conformal coating and extended temperature range suit harsh marine environments.

Competitive Comparison

The GE DS3800DPSS1C1C offers superior speed and noise immunity for critical turbine protection, but modern PLCs provide better diagnostics and remote configuration. For Mark IV systems, this board remains the only practical replacement.

Selection Guidelines & Precautions

1. Backplane Compatibility: The GE DS3800DPSS1C1C requires a Mark IV backplane Rev. M or later. For older racks, use adapter board 6DPSS-ADAPTER-M to avoid shorting the +24V rail.

2. Thermocouple Configuration: Verify DIP switch settings match your thermocouple type (especially R/S). Incorrect settings cause non-linear errors exceeding ±50°C at high temperatures.

3. Power Derating: Above 70°C, reduce +5V load to 25A. Calculate total rack current to avoid thermal shutdown.

4. Conformal Coating: Inspect for damage before installation in corrosive environments; repair with HumiSeal 1B31 if needed.

5. Alarm Contact Wiring: Relay rated 24VDC @ 1A or 120VAC @ 0.5A. Do not exceed ratings.

6. ESD Handling: Use grounded wrist straps and anti-static bags; CMOS inputs are sensitive.

7. Sourcing: Only purchase from reputable suppliers with functional test certificates, including thermocouple linearity, ripple measurement (<50mV), and capacitor replacement verification.