Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Inputs | 16 digital, optically isolated |
| Input Voltage | 24V DC / 125V DC (selectable) |
| Input Current | 5mA typical per channel |
| Outputs | 8 digital, solid‑state (MOSFET) |
| Output Voltage | 24V DC / 125V DC (selectable) |
| Output Current | 0.5A per channel (continuous), 1.0A peak |
| Response Time | <2ms (inputs), <5ms (outputs) |
| Isolation | 1500V RMS (field‑to‑backplane) |
| Diagnostics | Open/short detection, overcurrent protection, watchdog |
| Power | +5V @ 0.9A; +15V @ 0.35A (VME backplane) |
| Firmware | Factory‑programmed (not field‑upgradeable) |
| Conformal Coating | No |
| MTBF | >195,000 hours |
Advantages
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Balanced I/O – 16 inputs and 8 outputs in a single slot.
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Dual Voltage Support – 24V or 125V DC field power.
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Optical Isolation – 1500V isolation for noise immunity.
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Fast Response – <2ms input scan time.
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Hot‑Swap Capable – IEEE 1101.11 compliant.
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Diagnostics – Open/short detection and overcurrent protection.
Applications
| Industry | Use |
|---|---|
| Gas Turbines | Start/stop sequencing, valve control, flame detection, status monitoring |
| Steam Turbines | Emergency trip signals, solenoid control, governor actuation |
| Combined Cycle | HRSG damper control, pump run/stop status |
| Oil & Gas | Compressor anti‑surge status, shutdown logic |
Comparison
| Feature | DS3800HPTK | DS3800HPTJ | DS3800HPBC | DS3800HMPK |
|---|---|---|---|---|
| Inputs | 16 digital | 16 digital | 16 digital | 8 analog |
| Outputs | 8 digital | 8 digital | 8 digital | None |
| Voltage | 24/125V selectable | 24/125V selectable | 24/125V selectable | N/A |
| Type | Digital I/O | Digital I/O | Digital I/O | Analog input |
| Best For | Standard control | Standard control | Standard control | Temperature |
Note: The DS3800HPTK is functionally similar to the DS3800HPTJ and DS3800HPBC series. The suffix difference may indicate minor variations in firmware, calibration, or I/O configuration. Verify compatibility with your Mark V system before use.
Selection
| Scenario | Choice |
|---|---|
| Standard I/O (16 in / 8 out) | DS3800HPTK – balanced control. |
| More outputs (16 in / 16 out) | Use DS3800HPLA or DS3800HPMA. |
| More inputs (32 in) | Use DS3800HPCA (32 inputs) + separate output module. |
| Temperature monitoring | Use DS3800HMPK series. |
| TMR | Three identical HPTK modules. |
| Non‑GE | Do not use – VME only. |
Critical Precautions
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Authenticate – Check GE hologram, serial number.
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ESD – Wear grounded wrist strap.
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Backplane – Verify +5V, +15V, -15V before insertion.
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Voltage Selection – Verify field voltage (24V or 125V) matches module configuration.
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Wiring – Use shielded cable; maintain separation from AC power.
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Load Check – Outputs rated 0.5A continuous; 1.0A peak. Verify connected load.
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External Fusing – GE recommends external fuses on each output for protection.
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Torque – 0.5‑0.6 Nm.
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Temp – Keep rack <70°C.
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Firmware – Factory‑programmed; cannot be field‑updated.
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Sourcing – Obsolete; source refurbished from certified GE repair centers.
Final Summary
The General Electric DS3800HPTK is a standard digital I/O module for GE Speedtronic systems, offering 16 optically isolated inputs and 8 isolated outputs with selectable 24V or 125V DC field power. It is ideal for applications requiring standard monitoring and actuation capacity. It is similar to the DS3800HPTJ and DS3800HPBC series. For balanced I/O with more outputs, use DS3800HPLA or DS3800HPMA. For temperature monitoring, choose DS3800HMPK. Source from certified repair centers.
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