DS3800HLEA1B1B GE

Parameters

• Input Type: 24V DC discrete (sourcing/sinking, configurable)

• Input Channels: 24 channels (high-density configuration)

• Input Voltage: 24V DC (nominal), 10–30V DC range

• Input Current: 5mA per channel (typical)

• Response Time: <0.8ms (B1 optimized, faster than standard <1ms)

• Isolation: 2500V RMS optical isolation (channel-to-backplane)

• Power: +5V DC @ 0.9A, +24V DC @ 0.3A (field power)

• Filtering: Programmable input debounce filter with 50Hz/60Hz noise rejection (B1 feature)

• 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, open-wire detection, short-circuit protection, and signal noise alert (B1 feature)

Advantages & Features

• High-density input monitoring – 24 channels on a single board, providing more sensor inputs than HLCA (8 in) or HLCB (4 in)

• B1 firmware offers faster response (<0.8ms), built-in 50/60Hz noise rejection, and enhanced diagnostics including signal noise alerts – a significant upgrade over standard A revisions

• Flexible input configuration – channels can be set as sourcing or sinking via jumpers

• Isolated channels protect the backplane from field wiring faults and surges

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

• Front-panel LEDs for per-channel status, fault, open-wire detection, and signal noise alerts

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

Application Cases

• Turbine overspeed monitoring – high-speed inputs from multiple magnetic pickup sensors with noise filtering

• Flame detection systems – digital signals from UV/IR flame scanners across multiple burner zones

• Valve position feedback monitoring – limit switches from fuel, steam, and bypass valves

• Proximity switch monitoring – for turbine speed, position, and timing applications

• Retrofit projects replacing multiple lower-density input boards with a single high-density solution

Competitor Comparison

• vs. DS3800HLEA (standard A variant): Faster response (<0.8ms vs. <1ms), B1 noise rejection, enhanced diagnostics, and B coating (vs. A) – significant upgrade

• vs. DS3800HLCA (A variant): More input channels (24 vs. 8) but no outputs – HLEA1B1B is input-only with higher density and B1 features

• vs. DS3800HLCB (B variant): More input channels (24 vs. 4) but no outputs – HLEA1B1B is input-only with significantly higher density and B1 features

• vs. DS3800HL0A1EC (input-only high-speed): Higher channel density (24 vs. 16), B1 firmware, and B coating – HLEA1B1B is a more advanced variant

• vs. DS3800HHRB1D1D (standard discrete I/O): HLEA1B1B offers faster response (<0.8ms vs. 3ms) and higher input density – significant upgrade for high-speed monitoring

• vs. ABB DSDI series: Similar high-speed discrete capability, but GE offers higher channel density, B1 noise rejection, and better Mark IV integration

• vs. Siemens 6ES7 series: Similar functionality, but GE offers specialized high-speed input-only configuration with higher density and B1 features

• vs. Woodward 5437 modules: GE offers higher input density, faster response, and noise rejection

Selection Suggestions

• Critical: Confirm input type (sourcing vs. sinking) – jumper settings must match your field devices

• Verify your backplane provides both +5V and +24V field power – this board requires both rails

• Assess channel count – 24 inputs cover large turbine monitoring applications with multiple sensors

• Evaluate if B1’s noise rejection and signal noise alerts are beneficial – particularly valuable in electrically noisy environments

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

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

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

Precautions

• Critical: Do not exceed 30V DC on input channels – overvoltage may damage the isolation circuits

• Critical: High-speed inputs are sensitive to noise – use shielded twisted-pair cables and proper grounding to avoid false triggers; B1’s noise rejection helps but is not a substitute for good wiring practices

• Ensure field power supply (+24V DC) is stable and within 10–30V DC range

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

• B coating provides basic protection but is not suitable for frequent humidity, salt spray, or chemical exposure – upgrade to C/D/G/H if needed

• Allow 30-minute warm-up before commissioning

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

• Periodically verify input operation every year (high-speed protection circuits require regular testing)

• Do not hot-swap – Mark IV backplanes require power-off for insertion/removal

• If replacing multiple lower-density boards, verify wiring and pinout compatibility – HLEA may differ from other discrete series in pin assignments