Features:
- Runs the relay-ladder program in GEM80/141 and GEM80/142 systems.
- Uses the -4155 processor hardware implementation.
- Coordinates stored logic with 140-series rack memory and I/O.
This model is kept separate from -4154 because the hardware suffix is a purchasing and compatibility control.
The board supplies the application-processing function for the installed controller sequence.
Revision labels, memory contents and startup state should be documented before the change window begins.
Availability is confirmed against the complete 8261-4155 identity, required condition, quantity and delivery destination at quotation.
Verified resources for GEC Industrial Controls 8261-4155:
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
- Operate an established GEM80/141 process-control sequence.
- Support a legacy GEM80/142 rack that depends on -4155 processor hardware.
- Prepare a tested spare for a controlled processor-recovery plan.
- The ladder archive must correspond to the exact plant and rack definition.
- Retentive values require controlled transfer or reinitialization.
- Program comparison should be completed before the processor is placed in run.
- Change control should preserve the approved application revision and test evidence.
- Panel work must follow the site's isolation and functional-safety procedures.
- Final records should identify the installed processor and memory revisions.
- The processor depends on the companion memory, backplane and I/O arrangement.
- Rack connectors should be inspected before the replacement board is seated.
- External interfaces must return to their documented operating state after startup.