The **FP2-S100-R** is a specific component within the Panasonic (formerly Matsushita/NAiS) **FP2/FP2SH Series** Programmable Logic Controller (PLC) lineup. It is a high-performance **Standard Backplane (Base Unit)** designed to house the CPU, power supply, and various I/O modules. --- ### 1. Technical Specifications The FP2-S100-R acts as the physical and electrical foundation for the PLC system. Its primary role is to provide the communication bus and power distribution between modules. | Feature | Specification | | :--- | :--- | | **Product Type** | Standard Backplane (Base Unit) | | **Number of Slots** | 10 Slots (for I/O, CPU, and Special modules) | | **Compatible Series** | Panasonic FP2 / FP2SH | | **Mounting Type** | DIN Rail or Screw Mounting | | **Expansion Capability** | Supports expansion backplanes via cable | | **Internal Bus** | High-speed parallel bus for data exchange | --- ### 2. Key Components & Layout The backplane consists of several critical electronic interfaces: * **Power Supply Slot:** A dedicated position (usually on the far left) for the FP2 Power Supply Module (e.g., FP2-PSA1 or PSA2). * **CPU Slot:** A dedicated slot for the FP2SH CPU module which manages the logic processing. * **I/O Slots:** 10 universal slots that accept digital input/output modules, analog modules, or communication units (RS232, Ethernet, etc.). * **Connector Interface:** Robust multi-pin gold-plated connectors that ensure low-resistance contact for the data bus and power rails. --- ### 3. Functional Electronic Role The FP2-S100-R is more than just a mounting rack; it performs the following electronic functions: 1. **Signal Routing:** It facilitates the high-speed transfer of bits between the CPU and the peripheral modules. 2. **Power Distribution:** It distributes DC voltages (typically 5V and 24V derived from the power module) across the backplane to energize the logic circuits of every connected module. 3. **Address Mapping:** The physical position (slot number) on the backplane determines the hardware address of the module in the PLC software, simplifying the configuration process. 4. **Noise Shielding:** The structural design includes grounding points to minimize Electromagnetic Interference (EMI) between high-speed logic signals and external industrial noise. --- ### 4. Comparison of Variants The "S100" indicates the slot capacity. Panasonic offers different sizes based on system requirements: * **FP2-S09:** 9 Slots * **FP2-S100-R:** 10 Slots (Standard High Capacity) * **FP2-S12:** 12 Slots