Integrating advanced optical network connectivity directly into the processor architecture, the Mitsubishi Electric A2ACPUP21 serves as a specialized central processing unit for the legacy MELSEC A Series PLC platform. This module combines the processing performance of an A2ACPU core with an integrated MELSECNET optical data link interface, providing high-speed peer-to-peer and master-sub station communications across fiber-optic loops. By consolidating control execution and optical networking capabilities onto a single slot, this CPU unit optimizes backplane space efficiency and minimizes communication latency within distributed control topologies.
| Manufacturer | Mitsubishi Electric |
| Model Number | A2ACPUP21 |
| Product Line | MELSEC A Series |
| Module Type | Data Link PLC CPU Unit |
| Network Interface | MELSECNET Optical Fiber Loop (P21 Type) |
| Medium Link Connection | Dual-core optical fiber cable (SI/GI spec) |
| Operating Temperature | 0 to 55 degC |
| Country of Origin | Japan |
| Shipping Weight (Calculated) | 2.0 kg (4.41 lbs) |
| Package Dimensions (Calculated) | 250 mm x 110 mm x 130 mm |
| Port / Interface | Function / Cable Assignment |
|---|---|
| TX Port | Optical fiber transmitter (outbound loop segment) |
| RX Port | Optical fiber receiver (inbound loop segment) |
| RS-232C Port | Programming, debugging, and peripheral connectivity interface |
The A2ACPUP21 integrates functions equivalent to an A2ACPU combined with an AJ71LP21 optical data link card. When replacing older non-integrated configurations, ensure your program address allocations accommodate the integrated link parameters. Be aware that the optical transceiver circuits are optimized for SI-type (plastic-clad) or GI-type (glass) fiber optic cables; matching the correct cable attenuation characteristics is critical for link stability.
A common field issue with legacy MELSECNET optical modules is signal degradation caused by micro-bends or dust accumulation inside the fiber ports. Ensure you maintain the manufacturer's specified minimum bend radius for the fiber cables inside the wiring duct. Always use standard protective dust caps on unused RX/TX channels to prevent contamination of the optical transceiver lenses.
During initial commissioning, verify the station number and network settings using the hardware rotary switches located on the front faceplate of the CPU prior to powering up the chassis. If the "L.ERR" (Link Error) LED activates, verify that the TX of the master station is connected directly to the RX of the local station. Interchanging the TX/RX fiber connections is the leading cause of initial handshake failures in redundant optical loop configurations.
CRITICAL WARNING
Isolate and lock out all AC/DC power sources feeding the PLC backplane chassis before installing, removing, or adjusting the CPU unit. Failure to completely de-energize the system can result in electrical shock, hardware destruction, or erratic control system behaviors that could lead to machinery damage.
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Returns & Warranty
Manufacturer: Mitsubishi Electric
Product No.: A2ACPUP21
Country of origin:United States
Product Type: PLC CPU Modules
Payment: T/T, Western Union
Weight: 500g
Dimensions: 250 mm x 110 mm x 130 mm
Shipping port: Xiamen
Warranty: 12 months
Integrating advanced optical network connectivity directly into the processor architecture, the Mitsubishi Electric A2ACPUP21 serves as a specialized central processing unit for the legacy MELSEC A Series PLC platform. This module combines the processing performance of an A2ACPU core with an integrated MELSECNET optical data link interface, providing high-speed peer-to-peer and master-sub station communications across fiber-optic loops. By consolidating control execution and optical networking capabilities onto a single slot, this CPU unit optimizes backplane space efficiency and minimizes communication latency within distributed control topologies.
| Manufacturer | Mitsubishi Electric |
| Model Number | A2ACPUP21 |
| Product Line | MELSEC A Series |
| Module Type | Data Link PLC CPU Unit |
| Network Interface | MELSECNET Optical Fiber Loop (P21 Type) |
| Medium Link Connection | Dual-core optical fiber cable (SI/GI spec) |
| Operating Temperature | 0 to 55 degC |
| Country of Origin | Japan |
| Shipping Weight (Calculated) | 2.0 kg (4.41 lbs) |
| Package Dimensions (Calculated) | 250 mm x 110 mm x 130 mm |
| Port / Interface | Function / Cable Assignment |
|---|---|
| TX Port | Optical fiber transmitter (outbound loop segment) |
| RX Port | Optical fiber receiver (inbound loop segment) |
| RS-232C Port | Programming, debugging, and peripheral connectivity interface |
The A2ACPUP21 integrates functions equivalent to an A2ACPU combined with an AJ71LP21 optical data link card. When replacing older non-integrated configurations, ensure your program address allocations accommodate the integrated link parameters. Be aware that the optical transceiver circuits are optimized for SI-type (plastic-clad) or GI-type (glass) fiber optic cables; matching the correct cable attenuation characteristics is critical for link stability.
A common field issue with legacy MELSECNET optical modules is signal degradation caused by micro-bends or dust accumulation inside the fiber ports. Ensure you maintain the manufacturer's specified minimum bend radius for the fiber cables inside the wiring duct. Always use standard protective dust caps on unused RX/TX channels to prevent contamination of the optical transceiver lenses.
During initial commissioning, verify the station number and network settings using the hardware rotary switches located on the front faceplate of the CPU prior to powering up the chassis. If the "L.ERR" (Link Error) LED activates, verify that the TX of the master station is connected directly to the RX of the local station. Interchanging the TX/RX fiber connections is the leading cause of initial handshake failures in redundant optical loop configurations.
CRITICAL WARNING
Isolate and lock out all AC/DC power sources feeding the PLC backplane chassis before installing, removing, or adjusting the CPU unit. Failure to completely de-energize the system can result in electrical shock, hardware destruction, or erratic control system behaviors that could lead to machinery damage.
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|
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