GE DS38080HRDB

Key Parameters

• Output Channels: 16 or 32 isolated digital outputs (depending on configuration)

• Output Type: High-side or low-side solid-state drivers (jumper-selectable)

• Output Voltage: 24V DC or 48V DC (field-selectable)

• Output Current: 0.5A per channel (continuous), 1.0A peak (short duration)

• Isolation: 2500V RMS channel-to-backplane (enhanced for high-reliability variant)

• Diagnostics: Per-channel LED status, short-circuit protection, over-current protection, thermal shutdown, fault feedback to processor

• Response Time: <1ms (turn-on/turn-off)

• Temp Range: –40°C to +85°C (extended)

• Power Supply: +5V (logic), +24V/48V (field power) from backplane or external supply

• Physical: 6U VME single-slot board

• Key Features: High-reliability design, solid-state outputs, short-circuit protection, per-channel fault feedback, extended temp range, high isolation

Advantages

• High-reliability design – the DS38080HRDB is built with enhanced component selection, derating, and extended temperature range, making it suitable for critical turbine safety circuits.

• Solid-state outputs – no mechanical contacts to wear out, providing faster switching and longer service life than relay-based outputs.

• Comprehensive protection – short-circuit, over-current, and thermal protection on each channel safeguard the General Electric DS38080HRDB and connected field devices.

• Fault feedback – each channel provides status feedback to the processor, enabling diagnostic monitoring of output health.

• Field-configurable – jumper-selectable for high-side or low-side output and 24V or 48V operation, accommodating different field devices and voltage levels.

• High isolation – 2500V RMS isolation protects the backplane and processor from field-side faults.

• Extended temperature range – operates from –40°C to +85°C for harsh environments.

• Fast response – <1ms switching time for time-critical control and protection functions.

• Drop-in compatible – works with all Mark IV backplanes and processor configurations.

Applications

• Turbine trip circuits – the General Electric DS38080HRDB drives critical trip solenoids for fuel, steam, and lube oil emergency shutdown.

• Safety-critical interlock outputs – used in overspeed protection, fire protection, and emergency stop systems requiring high reliability.

• Solenoid valve control – drives on/off solenoid valves for purge, drain, and isolation functions.

• Alarm annunciation – activates panel lamps, horns, and DCS alarm inputs.

• Motor contactor control – drives contactor coils for auxiliary equipment (pumps, fans, cooling systems).

• Offshore and harsh environments – extended temperature range and enhanced reliability make it suitable for demanding applications.

vs Competitors & Previous Variants

Selection Tips

• High-reliability requirements – choose the DS38080HRDB for safety-critical or harsh-environment applications where enhanced reliability and fault diagnostics are required.

• Solid-state preference – if you require maintenance-free, fast-switching outputs without mechanical wear, the DS38080HRDB is preferred over relay-based boards like the DS3800NVRC.

• Fault diagnostics – the per-channel fault feedback of the General Electric DS38080HRDB enables predictive maintenance and rapid troubleshooting.

• Field voltage matching – verify that your field devices operate at 24V or 48V DC, and configure the DS38080HRDB jumpers accordingly.

• Output current verification – ensure the 0.5A continuous current rating of the DS38080HRDB is sufficient for your loads; use external interposing relays for higher current loads.

• Spare strategy – keep one DS38080HRDB per 5–8 installed units, especially in critical applications where it serves safety functions.

• Pre-installation testing – verify output functionality and fault detection using the on-board diagnostic LEDs and processor feedback.

Critical Precautions

• Output current limits – do not exceed 0.5A continuous per channel on the DS38080HRDB. Overloading can trigger thermal shutdown or damage the output stage.

• Inductive loads – for solenoid and relay coil loads, install a flyback diode (for DC loads) across the load to prevent voltage spikes that can damage the General Electric DS38080HRDB output stage.

• Field voltage selection – ensure the DS38080HRDB jumpers are correctly set for 24V or 48V operation before applying field power. Incorrect settings can damage the outputs.

• High-side vs low-side – configure the jumper for high-side or low-side output to match your field device wiring; incorrect configuration can cause malfunction or damage.

• Wiring polarity – observe correct polarity when connecting field devices to the DS38080HRDB outputs; reversed polarity can cause malfunction or damage.

• Cable shielding – use shielded cables for output wiring in electrically noisy environments. Ground the shield only at the DS38080HRDB end to prevent ground loops.

• Heat dissipation – ensure adequate cabinet cooling; the DS38080HRDB can generate significant heat under full load. Derating may apply at high temperatures; consult the technical manual.

• Fault handling – if a channel fault is reported, verify the field wiring and load before resetting or replacing the DS38080HRDB.

• Hot-swap – never insert or remove the DS38080HRDB while the rack is powered; this can cause bus errors or damage.

• ESD handling – always use a grounded wrist strap when handling the DS38080HRDB; CMOS and power components are ESD-sensitive.

• Storage – store spare DS38080HRDB boards in anti-static bags in a dry, temperature-controlled environment.