描述
从结构上分，PLC分为固定式和组合式（模块式）两种。固定式PLC包括CPU板、I/O板、显示面板、内存块、电源等，这些元素组合成一个不可拆卸的整体。模块式PLC包括CPU模块、I/O模块、内存、电源模块、底板或机架，这些模块可以按照一定规则组合配置。
Tescom Pressure Valve w/Enerpac&Swagelok Gauge-15K PSI
98′ Swagelok 7R-8 1/2″ Thermoplastic Hose w/SS Fittings
Swagelok Model: SS-8BK-1C Stainless Bellow Valve
New Swagelok SS-HBV51-CM High Pressure Bellows Valve
Lot 5 C. Steel Swagelok S-1610-2-16PR Male Elbow NEW
HUGE ASSORTED LOT SWAGELOK TEE STRAIGHT ELBOW FITTINGS
SWAGELOK SS-4BMG-V16 NSPP SS4BMGV16
Swagelok SS-16HO-1-16-S16 Flex Metal Hose
Swagelok/Nupro Bellows Sealed Valve SS-4BRG-V51 NEW
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Swagelok SS-BNV51-O High-Purity Bellows-Seal Valve 1/4″
SWAGELOK WHITEY # SS-6NKRSW8T NEEDLE VALVE
Swagelok SS-HBV51-C Bellows Sealed Valve Nupro
