The YASKAWA JRMSI-B1026 is a 6-slot Mounting Base (Backplane) from the legacy Memocon-SC GL series (specifically the GL60 / GL70 / GL120/130 architectures).
It serves as the physical chassis and electrical communication highway for a medium-sized PLC configuration.
Introduction
The JRMSI-B1026 acts as the foundation for the Memocon-SC system. It provides the internal bus connections that allow the CPU to communicate with I/O modules and power supplies.
While the series is largely considered “legacy,” the B1026 remains a critical component in existing industrial plants that rely on Yaskawa’s robust 1990s-era automation hardware.
Technical Parameter Table
| Parameter | Specification |
| Model Number | JRMSI-B1026 (also known as JAMSI-B1026) |
| Series | Memocon-SC GL Series (Legacy) |
| Number of Slots | 6 Slots (For CPU, I/O, and special modules) |
| Backplane Type | Parallel Bus Architecture |
| Mounting Style | Panel / Rack Mount (Interior of Control Cabinet) |
| Material | Industrial Grade Steel / Composite PCB |
| Dimensions | Approx. 280mm x 150mm (Standardized for GL series) |
| Operating Temp | 0°C to +55°C |
| Compatible Modules | JAMSC-B / JAMSC-C Series I/O |
Product Advantages and Features
Modular Flexibility: The 6-slot design is ideal for medium-complexity machines, offering a balance between space-saving and expandability.
High Vibration Resistance: Built to the heavy-duty standards of the automotive and steel industries, ensuring the modules remain securely seated.
Passive Backplane Reliability: Since the base contains no active processing components (it is a bus highway), it has a very high Mean Time Between Failures (MTBF).
Gold-Plated Connectors: Features high-quality contact points to prevent signal degradation or oxidation over decades of service.
JRMSI-B1026
Application Cases
Heavy Machinery Control: Often found in large-scale hydraulic presses or metal stamping lines.
JRMSI-B1026
Automotive Assembly: Used in legacy conveyor systems and robotic cell interfaces where Memocon PLCs were the standard.
Water Treatment Plants: Controlling simple sequence logic for pumps and valves in aging municipal infrastructure.
Retrofit Maintenance: Providing a stable platform for technicians to swap out faulty old-generation I/O cards without replacing the entire control system.
Other Models in the Same Series
The JRMSI mounting bases were manufactured in various sizes to accommodate different system scales:
| Model | Description |
| JRMSI-B1024 | 4-slot Mounting Base (Compact) |
| JRMSI-B1028 | 8-slot Mounting Base (Large) |
| JRMSI-B1031 | 10-slot Mounting Base (Maximum capacity) |
| JAMSC-B1010 | Standard 16-point Digital Input Module (Compatible) |
| JAMSC-B1070 | Register Output Module (Compatible) |
Related Models (Complementary Parts)
JACP-317: The common CPU module used in this rack.
JAMSC-P1010: The Power Supply Unit (PSU) typically mounted to the far left of this base.
JAMSC-IF Series: Interface cards for remote I/O expansion.
Need to verify compatibility?
If you are replacing a damaged base, it is vital to ensure the slot connectors are free of debris and that your existing CPU (e.g., GL series) supports the 6-slot addressing.
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