Description
| Specification | Details |
|---|---|
| Brand | GE / General Electric |
| Part Number | 531X307LTBAHG1 |
| Series | 531X |
| Board Designation | LTB |
| Product Type | LAN I/O Terminal Board |
| Primary Function | Field I/O termination and LAN/control-board interface |
| Typical Applications | GE DC2000 drives; GE EX2000 excitation systems |
| Configurable Control Inputs | 8 |
| Input Voltage Range | 2–240 VAC or VDC |
| Input Signal Conversion | Converts input signals to 24 VDC logic signals for the associated control electronics |
| Relay Outputs | 7 Form C, non-fused relay outputs |
| Relay Output Rating | 125 VAC, 0.6 A; 30 VDC, 2.0 A; 110 VDC, 0.6 A |
| Connector / I/O Interfaces | 8PL, 10PL, OPTPL and relay-terminal-board interfaces |
| Processor | None; terminal/interface board |
| Standalone Operation | No; operates as part of the host GE control system |
| Firmware | No standalone firmware |
| Mounting | Internal GE drive/excitation-control cabinet |
| Lifecycle | Discontinued / legacy |
| Weight | Not reliably verified |
| Dimensions | Not reliably verified |
| Country of Origin | Verify from the actual unit |
GE 531X307LTBAHG1
Product Overview
The 531X307LTBAHG1 provides the field interface between a compatible GE drive/control system and external devices such as pushbuttons, indicator lamps, and interlocks. The board provides eight configurable control inputs that can accept 2 to 240 VAC or VDC. These input signals are converted to 24 VDC logic signals for use by the associated control electronics.
The board also incorporates seven Form C relay outputs. The documented ratings are 125 VAC at 0.6 A, 30 VDC at 2.0 A, and 110 VDC at 0.6 A.
Communication and Interconnection
The LTB connects the field and control-system wiring through several defined interfaces:
| Interface | Function |
|---|---|
| 8PL | I/O between the LTB, SDCC/LDCC drive-control boards, and NTB/3TB terminal board |
| 10PL | I/O between the LAN control board or SLCC/LDCC drive/LAN control board and the LTB |
| OPTPL | I/O between the LTB and NTB/3TB terminal boards |
| RTB / RTBA / RPL | Relay terminal-board and LTB interconnection |
These connections make the board a system-level interface component rather than an independent controller.
Typical GE Systems
Current references associate 531X307LTBAHG1 with the DC2000 and EX2000 families. Radwell specifically categorizes the part as a discontinued LAN I/O Terminal Board (LTB), DC2000 & EX2000 Drives.
An industrial control equipment inventory also identifies the exact part number as an “I/O TB Card” within a GE legacy control inventory.
Replacement Considerations
The 531X family contains numerous LTB variants, including 531X307LTBAFG1, 531X307LTBAHG1, 531X307LTBAJG1, and 531X307LTBAKG1. The existence of multiple variants means a visually similar 531X LTB should not be assumed to be a direct substitute.
For a replacement, verify:
- Complete part number 531X307LTBAHG1
- Board revision and artwork markings
- Host drive or excitation-system model
- Connector arrangement and terminal wiring
- Eight-input configuration
- Relay output wiring
- Associated SDCC, LDCC, SLCC, NTB, or 3TB hardware
A current GE electrical distributor lists 531X307LTBAKG1 as superseding 531X307LTBAHG1 and 531X307LTBAJG1. This is useful sourcing information, but the substitution should still be checked against the installed system documentation before engineering replacement.
Lifecycle and Obsolescence
The 531X307LTBAHG1 is currently listed as discontinued by the manufacturer, while specialist suppliers continue to list new-surplus or replacement inventory.
For plants operating legacy GE DC2000 or EX2000 equipment, an exact spare can be relevant to lifecycle planning because the LTB is tied to the cabinet’s existing field-wiring and control architecture.
Important Specification Note
The LAN I/O terminal-board function, eight configurable inputs, 2–240 VAC/VDC input range, and seven Form C outputs are supported by the available technical references.
I would not publish exact dimensions, weight, MTBF, insulation rating, or environmental certification for this exact board without the applicable GE drawing or OEM documentation.
FAQ
What is GE 531X307LTBAHG1?
It is a GE 531X Series LAN I/O Terminal Board (LTB) for legacy drive and excitation-control equipment.
What systems use this board?
It is associated with GE DC2000 and EX2000 systems.
How many control inputs does it provide?
The documented configuration provides 8 configurable inputs accepting 2–240 VAC or VDC.
How many relay outputs are included?
The board has 7 Form C relay outputs with the documented AC/DC ratings.
Is it a PLC or CPU board?
No. It is a LAN I/O terminal/interface board, not a standalone processor.
Is 531X307LTBAKG1 a replacement?
Gexpro currently lists 531X307LTBAKG1 as superseding 531X307LTBAHG1, but system-level compatibility should be verified before substitution.
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