Description
GE Fanuc IC660BBA025 | Genius 6-Output Analog Block
Dynamic Product Introduction
When a legacy control system loses an analog output channel, the consequences can reach well beyond the I/O cabinet. A valve position command, speed reference, or other 4–20 mA control signal may be lost, forcing a process into manual operation or a protective state. The GE Fanuc IC660BBA025 is a six-channel Genius I/O current-source block designed to deliver those signals directly to field devices.
Unlike a passive analog output interface, the IC660BBA025 provides loop power for its 4–20 mA outputs. Each channel can be software-configured, scaled to engineering units, and monitored for output feedback conditions. The block also supports output hold-last-state or default behavior, making configuration review an important part of any replacement or migration strategy.
For maintenance teams supporting installed Genius networks, this is a legacy replacement component—not a drop-in substitute for a modern rack-based analog output card. Verify the existing bus architecture, block configuration, terminal assembly, and revision before installation. The manufacturer has discontinued the IC660BBA025, so tested surplus and refurbished inventory may be relevant for maintenance or lifecycle-extension projects.
IC660BBA025
Key Technical Specifications
- Catalog Number: IC660BBA025
- Product Family: GE Fanuc Genius I/O
- Output Type: Current-source analog output
- Number of Outputs: 6
- Output Range: 0–24 mA
- Common Industrial Signal: 4–20 mA
- Output Resolution: 6 µA
- Output Accuracy: 0.15% at 25°C
- Output Update Rate: 25 ms
- Nominal Supply: 24/48 VDC
- Supply Operating Range: 18–56 VDC
- Maximum Heat Dissipation: 12 W
- Maximum Supply Current: Approximately 600 mA
- Isolation: 1,500 V block-to-block
- Output Configuration: Software configurable
- Diagnostics: Output overrange, underrange, and feedback fault
- Redundancy Support: Dedicated Bus Switching Module control
- Configuration Tool: Genius Hand-held Monitor
- Approximate Dimensions: 8.83 × 3.34 × 3.91 in.
- Approximate Weight: 4.8 lb.
Specifications are based on available Genius I/O technical documentation and supplier records. Confirm the applicable manual and revision before using these values as acceptance limits in a critical control loop.
Global Sourcing & Live-Test SOP
For a discontinued IC660BBA025, a credible procurement process should establish both physical identity and functional condition. A seller’s generic “tested” claim is not equivalent to a documented six-channel output test.
Inbound Verification
- Confirm the complete catalog number: .
- Photograph the nameplate, serial markings, and revision suffix.
- Verify that the shipment contains the complete I/O block—not only an electronics or terminal assembly.
- Inspect terminal connections, housing, and mounting surfaces for damage or prior overheating.
- Review supplier traceability paperwork and any available OEM documentation.
- Check revision-dependent housing and terminal compatibility before matching the block to an installed assembly.
Functional Test
- Apply a controlled DC supply within the documented 18–56 VDC range.
- Confirm Unit OK and I/O Enabled status.
- Establish Genius bus communication with a compatible controller or test interface.
- Exercise all six output channels using a calibrated current measurement setup.
- Verify representative output points, including 4 mA, 12 mA, and 20 mA.
- Where supported by the test configuration, verify operation across the wider 0–24 mA range.
- Check output scaling and engineering-unit conversion.
- Exercise feedback diagnostics and verify fault reporting.
- Record measured output current, supply voltage, block revision, and test results.
Burn-In & Final Preparation
- Perform an extended powered test under controlled conditions.
- Monitor block status and output stability during the test.
- Record any intermittent communication or output faults.
- Document the tested channels and test equipment used.
- Package the block in ESD-safe material with terminal protection.
- State the actual condition clearly: surplus, used, refurbished, or factory sealed.
A 24-hour heat run can be used as a seller-defined screening procedure, but it should not be represented as an OEM-mandated acceptance test unless the applicable documentation requires it.
Field Engineer’s Pitfall Guide
❗ Verify the Revision and Terminal Assembly
The revision suffix can affect housing and terminal compatibility. In particular, supplier documentation flags a newer electronic housing on Revision K and later. Before ordering, compare the replacement against the installed terminal assembly and plastic door—not just the base catalog number.
❗ Current-Source Outputs Are Not Passive 4–20 mA Inputs
The generates current-loop signals. Do not wire it as though it were a passive analog input card or assume that external loop power is required. Confirm the field device’s input type and wiring arrangement against the block’s terminal documentation before energizing the loop.
❗ Check the Genius Bus and Redundancy Configuration
A replacement block must match the site’s Genius bus addressing and redundancy configuration. The includes dedicated Bus Switching Module control, but that does not eliminate the need to verify the installed BSM, bus wiring, controller interface, and configuration. A block that powers up correctly may still fail to operate as expected if the network configuration is wrong.
Intent-Driven FAQ
What is the GE Fanuc used for?
It is a six-channel Genius I/O current-source analog output block. It provides 4–20 mA signals for compatible field devices such as control valves, actuators, and other analog-command equipment.
Does the require external loop power?
The block provides power to its current-loop output circuits. Separate external loop power is not required for the 4–20 mA outputs under the documented configuration. Verify the field wiring and device requirements before commissioning.
What is the output resolution?
The documented output resolution is 6 µA, with an output accuracy specification of 0.15% at 25°C. Resolution and accuracy are different specifications; neither should be treated as a substitute for a channel-level functional test.
Can the be hot-swapped?
Do not assume hot-swap safety from the block’s standalone design. Follow the site’s approved Genius I/O maintenance procedure and verify the consequences of removing the block for the specific controller, bus, field wiring, and process configuration.
Is the still manufactured by GE Fanuc?
The is listed as discontinued by the manufacturer. Maintenance buyers may need to consider tested surplus or refurbished stock, with exact revision and terminal compatibility verified before purchase.
Can I use the as a replacement for the IC660BBA105?
Not without checking the system requirements. Both are six-output current-source Genius blocks, but the is the 24/48 VDC version, while IC660BBA105 is the 115 VAC/125 VDC version. The supply architecture is a key distinction.
What warranty should I expect when buying a refurbished ?
Warranty coverage depends on the seller and purchase terms. Do not assume an OEM warranty applies to discontinued aftermarket inventory. Before ordering, confirm the warranty duration, return window, exclusions, and whether coverage includes functional failure of all six output channels.
