Without the manual, you would never know these exist.
The FA-2J series is characterized by its modularity and relatively high processing speed for its era. Processing Speed: 6ms per 1K basic instructions. I/O Capacity: Supports up to 128 inputs 128 outputs (256 total points). Memory Options: 1K or 4K CMOS-RAM (requires battery backup). (via plug-in memory packs like the PFA-1M14). Instruction Set:
: Provides hardware specifications and listed part numbers for CPUs (like the PF2J-CPU1) and link adapters. View Technical Datasheet Programming Software & Cables For programming the FA-2J, standard modern tools include: idec plc fa2j manual
Low-profile modules optimized for shallow control panels.
Proper installation and wiring are critical to prevent electrical noise interference and hardware damage. Power Supply Wiring Without the manual, you would never know these exist
608 points (up to 240 can be "maintained" during power failure). Timers/Counters: 80 timers (10ms resolution) and 45 counters. Data Registers: 400 points. Programming and Communication
When using standard switches or relay contacts, use the internal 24V DC service power supply provided on the PLC terminal strip. I/O Capacity: Supports up to 128 inputs 128
The modularity of the FA-2J system is one of its greatest strengths, allowing it to be tailored to a wide array of applications. Here are some of the compatible expansion units that would be detailed in the hardware manual:
Because the IDEC FA2J is discontinued, sourcing replacement parts can be difficult and expensive. It is highly recommended to plan a migration path to modern control architectures. Direct Replacement Options