描述
PLC按结构分为整体型和模块型两类，按应用环境分为现场安装和控制室安装两类；按CPU字长分为1位、4位、8位、16位、32位、64位等。从应用角度出发，通常可按控制功能或输入输出点数选型。
整体型PLC的I/O点数固定，因此用户选择的余地较小，用于小型控制系统；模块型PLC提供多种I/O卡件或插卡，因此用户可较合理地选择和配置控制系统的I/O点数，功能扩展方便灵活，一般用于大中型控制系统。
IBM 12210151-90 ALR Dual P6 CPU Board SA-10151-90
DEC M7265 11/34 CPU BOARD
MIDWAY WAR GODS PCB CPU BOARD TESTED WORKING 1996
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HP A1703-60043 CPU Board
One-day shipping available
Ecolab CPU Board 9258-1313 PWAP SS111 (P) NEW
ADC stack dryer Phase 5 Coin CPU Board
SUN X6894A 1.05GHZ 2-WAY V440/V880 CPU BOARD 501-6163
pdp8 pdp8a pdp 8 8a Digital DEC M8315 CPU Board
BACCPU QUAD CPU BOARD
Digital M7606-AC M7606 KA630 PN: 5016523-01 CPU Board
One-day shipping available
GE Security Micro/5-PX CPU Board 110124-005
DEC 54-30158-A5 ALPHA SERVER ES40 500 MHZ CPU Board
One-day shipping available
FANUC A16B-2200-0200 /01A MAIN CPU BOARD NEW SURPLUS
