Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Outputs | 4 analog, isolated |
| Output Types | 4-20mA, 0-20mA, 0-10V (software-configurable) |
| Resolution | 16-bit (effective: 15 bits) |
| Accuracy | ±0.08% FS (25°C); ±0.22% (-40°C to +85°C) |
| Update Rate | Up to 2000 Hz per channel |
| Isolation | 1500V RMS |
| Load | Current: 0-600Ω; Voltage: ≥2kΩ |
| Power | +5V @ 0.9A; +15V @ 0.4A |
| Diagnostics | Out-of-range, short-circuit detection, watchdog failsafe |
| Firmware | Factory-programmed (not field-upgradeable) |
| Conformal Coating | No |
| MTBF | >190,000 hours |
Advantages
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High-Speed Output – 2000 Hz update rate for dynamic control.
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Configurable Outputs – Software-selectable current or voltage per channel.
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Short-Circuit Protection – Self-resetting protection on each output.
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Watchdog Failsafe – Configurable safe state on communication loss.
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Hot-Swap Capable – IEEE 1101.11 compliant.
Applications
| Industry | Use |
|---|---|
| Gas Turbines | Fuel valve positioning, IGV control |
| Steam Turbines | Governor valve actuation, extraction control |
| Compressors | Anti-surge valve control |
| Pumps | Speed control, guide vane positioning |
Comparison
| Feature | DS3800HOSA1D1D | DS3800HOSA | DS3800HMAC1H1F |
|---|---|---|---|
| Outputs | 4 high-speed | 4 high-speed | 4 general-purpose |
| Update Rate | 2000 Hz | 2000 Hz | 100 Hz |
| Resolution | 16-bit | 16-bit | 18-bit |
| Accuracy | ±0.08% | ±0.10% | ±0.04% |
| Isolation | 1500V | 1500V | 2500V |
| Best For | Fast dynamic control | Fast dynamic control | General-purpose I/O |
Note: The DS3800HOSA1D1D is nearly identical to the base DS3800HOSA, with the suffix indicating a minor calibration or firmware variation.
Selection
| Scenario | Choice |
|---|---|
| Fuel valve/IGV control | DS3800HOSA1D1D – high-speed output. |
| General-purpose outputs | Use DS3800HMAC1H1F (slower but more accurate). |
| Input-only monitoring | Use DS3800HMPK series. |
| TMR | Three identical 1D1D modules. Do not mix revisions. |
| 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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Wiring – Use shielded cable; maintain separation from AC power.
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Load Check – Verify load is within 0-600Ω (current) or ≥2kΩ (voltage).
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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 DS3800HOSA1D1D is a high-speed analog output module designed for dynamic control applications in GE Speedtronic systems. It offers 2000 Hz update rate, 16-bit resolution, and short-circuit protection, making it ideal for fuel valve, IGV, and governor actuation. It is nearly identical to the base DS3800HOSA. For general-purpose outputs, consider DS3800HMAC1H1F. Source from certified repair centers.
A-B 1756-OB32
A-B 1756-OB16D
A-B 1756-IM16I/A
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