连接到第二条I/O总线扩展电缆的单阳连接器以继续I/O总线扩展链，或者连接到I/O总线终端插头（如果这是扩展链中的后一条电缆）。关于I/O总线扩展电缆的重要说明1。I/O扩展系统中可包含的大电缆数为7根，CPU基板和后一个扩展基板之间的大电缆总长度为50英尺（15米）。CPU基板和后一个远程基板之间的总大电缆长度为700英尺（213米）。未能遵守这些大电缆长度可能会导致PLC系统不稳定运行。2.CPU 350–364多支持七根I/O扩展电缆。CPU 331–341多支持四根I/O扩展电缆。3.50英尺（15米）的I/O总线扩展电缆（IC693CBL302），每端都有一个公接头，其I/O总线端接电阻器内置在电缆的端部接头中。
to either the single male connector of a second I/O bus expansion cable to continue the I/O bus expansion chain, or to an I/O bus Terminator plug if this is the last cable in the expansion chain. Important Notes About I/O Bus Expansion Cables 1. The maximum number of cables that can be included in an I/O expansion system is seven, and the total maximum cable length between the CPU baseplate and the last expansion baseplate is 50 feet (15 meters). The total maximum cable length between the CPU baseplate and the last remote baseplate is 700 feet (213 meters). Failure to observe these maximum cable lengths could result in erratic operation of the PLC system. 2. CPUs 350 – 364 support a maximum of seven I/O expansion cables. CPUs 331 – 341 support a maximum of four I/O expansion cables. 3. The 50 foot (15 meter) I/O bus expansion cable (IC693CBL302), which has a male connector on each end, has the I/O bus terminating resistors built into the end connector on the cable.
