Description
Technical Parameters
| Parameter | Specification |
|---|---|
| Outputs | 16 digital, solid‑state (MOSFET) |
| Output Voltage | 24V DC / 125V DC (selectable) |
| Output Current | 0.5A per channel (continuous), 1.0A peak |
| Inputs | None (output‑only) |
| Response Time | <5ms |
| Isolation | 1500V RMS (field‑to‑backplane) |
| Diagnostics | Short‑circuit detection, overcurrent protection, watchdog |
| Power | +5V @ 0.8A; +15V @ 0.3A (VME backplane) |
| Firmware | Factory‑programmed (not field‑upgradeable) |
| Conformal Coating | No |
| MTBF | >200,000 hours |
Advantages
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Output-Only Design – Dedicated output channels, no wasted I/O.
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Dual Voltage Support – 24V or 125V DC field power.
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Short‑Circuit Protection – Self‑resetting per‑channel protection.
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Watchdog Failsafe – Configurable safe state on communication loss.
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Hot‑Swap Capable – IEEE 1101.11 compliant.
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Diagnostics – Overcurrent detection and status monitoring.
Applications
| Industry | Use |
|---|---|
| Gas Turbines | Fuel valve control, starter motor control, IGV actuation |
| Steam Turbines | Governor valve control, extraction control, solenoid actuation |
| Combined Cycle | HRSG damper control, pump start/stop |
| Oil & Gas | Compressor anti‑surge valve control, shutdown actuators |
Comparison
| Feature | DS3800HRMB | DS3800HRMA | DS3800HPIB | DS3800HMPK |
|---|---|---|---|---|
| Inputs | None | None | None | 8 analog |
| Outputs | 16 digital | 16 digital | 16 digital | None |
| Voltage | 24/125V selectable | 24/125V selectable | 24/125V selectable | N/A |
| Type | Digital output | Digital output | Digital output | Analog input |
| Best For | Standard actuation | Standard actuation | Standard actuation | Temperature |
Note: The DS3800HRMB is functionally similar to the DS3800HRMA and DS3800HPIB series. The suffix difference may indicate minor variations in firmware, calibration, or output configuration. Verify compatibility with your Mark V system before use.
Selection
| Scenario | Choice |
|---|---|
| Standard output actuation | DS3800HRMB – 16 outputs, no inputs. |
| Large‑scale output actuation | Use DS3800HPID (32 outputs). |
| Inputs + outputs required | Use DS3800HPBC (16 in / 8 out) or DS3800HPBD (32 in / 16 out). |
| Digital control (24V only) | Use DS3800HP1B (combined I/O). |
| Temperature monitoring | Use DS3800HMPK series. |
| TMR | Three identical HRMB 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 DS3800HRMB is a digital output module for GE Speedtronic systems, offering 16 isolated outputs with selectable 24V or 125V DC field power. It is ideal for driving solenoids, valves, contactors, and alarm devices where inputs are handled by separate modules. It is similar to the DS3800HRMA and DS3800HPIB series. For large‑scale output applications, use DS3800HPID. For temperature monitoring, choose DS3800HMPK. Source from certified repair centers.
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