Description
Product Overview
The GE DS200SIOBH1AAA is an SIOB VME I/O board used in GE Mark V control equipment. Technical references identify it as an SC2000 VME I/O board, with the SIOB functional acronym and conformal-coated PCB construction. Its role is to provide the required I/O interface within the VME-based control architecture rather than act as a standalone CPU or conventional field transmitter interface.
Hardware configuration is a major consideration with GE DS200SIOBH1AAA. The board has 20 jumpers, three switch blocks containing six switches each, one LED, and a 40-pin connector. The jumper and switch positions are not cosmetic settings; they must be matched to the configuration of the board being replaced. Available replacement guidance specifically recommends examining the original board’s 20 jumpers and three switch banks and reproducing their positions on the replacement.
In a legacy Mark V installation, GE DS200SIOBH1AAA is best treated as system-specific hardware. The exact board revision is encoded in the complete part number: the SIOB function, H1 hardware group, and AAA revision sequence all matter when comparing replacement stock. The available technical references also distinguish the board from closely related DS200SIOBH1ABA and DS200SIOBH1ACA variants.
Product Introduction
A VME I/O board failure can interrupt communication between the Mark V control architecture and connected equipment even when the surrounding terminal hardware remains operational. GE DS200SIOBH1AAA provides the SIOB interface required by compatible Mark V installations.
The board carries 20 jumpers and 18 switch positions, giving maintenance personnel a substantial configuration record to preserve during replacement. For a Mark V legacy replacement, photographing and documenting every setting before removal is a practical step—not paperwork for its own sake.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | General Electric (GE) |
| Model | DS200SIOBH1AAA |
| Functional Acronym | SIOB |
| Product Family | Mark V DS200 |
| Board Type | VME I/O Control Board |
| System Association | GE Mark V / SC2000 |
| PCB Coating | Conformal coating |
| Functional Revision 1 | A |
| Functional Revision 2 | A |
| Artwork Revision | A |
| Jumpers | 20 |
| Switch Blocks | 3 |
| Switches per Block | 6 |
| Total Switches | 18 |
| Status Indicator | 1 LED |
| Main Connector | 1 × 40-pin connector |
| Bus Architecture | VME |
| Application | Turbine/control-system I/O interfacing |
| Condition | New Surplus, subject to inspection and testing |
The 20-jumper, 18-switch, LED, 40-pin connector, SIOB, conformal-coating, and Mark V details are supported by available technical references.
Specification caution: Public listings provide inconsistent electrical specifications for this legacy board. I would not assign a generic field-voltage, channel-count, power-consumption, or operating-temperature value to the DS200SIOBH1AAA without the original GE documentation or a confirmed board-level specification. One source, for example, provides a −40 to +85 °C figure without supplying supporting documentation.
DS200SIOBH1AAA
Related Products
- DS200SIOBH1ABA — Closely related SIOB VME board. It belongs to the same Mark V family, but the
ABArevision/configuration differs fromAAA; verify the installed system before substitution. - DS200SIOBH1ACA — Another SIOB variant in the H1 family. Its configuration differs from the AAA version, so the suffix must be matched rather than treating the three boards as identical.
- DS200SIOBH1A — Earlier/base SIOB designation used in GE VME control documentation. Useful for family identification, but insufficient as a replacement number by itself.
- DS200SIOBG1AAA — Related GE Mark V I/O control board with a different functional designation. It belongs to the same broad DS200 architecture but is not a direct substitute for SIOBH1AAA.
- DS200SDCCG1AFD — Mark V drive control board used for higher-level drive/control processing. It complements the SIOB function rather than replacing it.
- DS200DCFBG1BLC — GE Mark V power/interface board. Its function is power and interface support rather than VME I/O control.
- TBA Terminal Board — Field/interface hardware used elsewhere in compatible GE control architectures. The terminal assembly and SIOB board should be matched as a system.
- TBB Terminal Board — Related terminal hardware that may form part of the external I/O path in Mark V installations.
Frequently Asked Questions
What is GE used for?
The is a VME-based SIOB I/O control board associated with GE Mark V/SC2000 control hardware. Its purpose is system-level I/O interfacing within the VME architecture.
It should not be described as a standalone Mark V CPU.
What do the 20 jumpers and 18 switches do?
They provide hardware configuration for the board.
The exact function of each setting depends on the applicable GE system documentation and board configuration. During replacement, the safest field practice is:
- Photograph the original board.
- Record all 20 jumper positions.
- Record all 18 switch positions.
- Record the rack and slot location.
- Transfer the settings to the replacement where applicable.
- Verify system operation after installation.
Replacement guidance specifically calls for matching the original jumper and switch positions.
Can I hot-swap the ?
Do not assume that it is hot-swappable.
The board operates within a VME control architecture. Removing it from an energized rack can interrupt control-system communications or I/O functions.
Unless the specific installed Mark V equipment and approved maintenance procedure explicitly allow live replacement, isolate the equipment before removing the board.
Is interchangeable with DS200SIOBH1ABA?
Not automatically.
Both are SIOB boards within the same general DS200/Mark V family, but the final revision/configuration differs. The available product references list the AAA and ABA boards separately.
For a replacement decision, compare the complete part number, board revision, jumper/switch configuration, terminal-board connections, and system documentation.
Is the same as DS200SIOBH1ACA?
No. They share the SIOBH1 family designation, but AAA and ACA identify different configurations/revisions.
That distinction matters. The ACA variant is separately identified as a GE SIOB board, and secondary technical references associate it with different interface characteristics. Do not substitute it solely because the first seven characters match.
Will replacing erase my Mark V logic?
The SIOB board is an I/O interface board, not the primary controller application-storage device.
Replacing it should not be treated like replacing the main controller. The main risk is incorrect hardware configuration or incompatible board revision. Preserve the original jumper/switch settings and verify the associated terminal and VME connections before returning the system to service.
How should I verify a New Surplus ?
For this legacy GE board, I would require both visual inspection and configuration verification.
Incoming inspection should include:
- Exact nameplate/marking
- PCB revision and artwork identification
- Conformal coating condition
- VME connector condition
- 40-pin connector condition
- All 20 jumper positions
- All 18 switch positions
- LED operation
- Evidence of corrosion or heat damage
- Compatibility with the installed terminal hardware
- Controlled VME communication test
- Representative I/O test
One important procurement point: public listings sometimes call this board a generic “communication module” or publish unsupported voltage/frequency specifications. The more consistent technical identification is GE Mark V SIOB / SC2000 VME I/O board with 20 jumpers, 18 switches, one LED, and a 40-pin connector.
