描述
所有模块都固定在底板上。如德维森公司的PPC11、PPC22和PPC31系列PLC，OMRON公司的C200Ha机，CV2000等中、大型机就是这种结构。它比较牢固，但底板的槽数是固定的，如3、5、8、10槽等等。槽数与实际的模块数不一定相等，配置时难免有空槽。这既浪费，又多占空间，还得占空单元把多余的槽作填补。
CRESTRON CEN-UPS1250 1250W UNINTERRUPTIBLE POWER SUPPLY
CISCO 2851 INTEGRATED SERVICES ROUTER W HWIC 4ESW CARD!
IBM DS5020 STORAGE NETWORK MOD CONTROLLER CARD
WINCOR NIXDORF CMD-V4 BILL STACKER ASSY SAT/ER
2* ITERIS VANTAGE EDGE2 DUAL VEHICLE DETECTION PROC NEW
CISCO 8OC03/ATM/TS-IR-B= 8-PT OC-3/STM-1 ATM IR LC GSR
IBM DS4800 CM-2 44X2419 STORAGE CONTROLLER MODULE NEW!!
IBM DS4000 STORAGE ENCLOSURE 1740-710 W 14 * 73.4GB 15K
IBM DS4000 STORAGE ENCLOSURE 1740-1RU W 14 * 73.4GB 15K
2 * NAISH 12 RAVEN KITES +UNDERGROUND FLX KITEBOARD ++
NETAPP FAS900 SERIES FAS960C FILER DUAL CPU’S 6GB RAM!!
CISCO SYSTEMS TIMING COMM CONTROL 2 PLUS 15454-TCC2P-K9
LUCENT DFP-CN-10A/6N MICROWAVE FILTER 408883718 NEW NIB
HATHAWAY TELEFAULT TWS FAULT LINE TESTER / LOCATOR
