描述
PLC的输入与输出最好采用分开走线，开关量与模拟量也要分开敷设。模拟量信号的传送应采用屏蔽线，屏蔽层应一端或两端接地，接地电阻
电阻，物质对电流的阻碍作用就叫该物质的电阻。电阻小的物质称为电导体，简称导体。电阻大的物质称为电绝缘体，简称绝缘体。应小于屏蔽层电阻的1／10。
ROSEMOUNT 623785 MICROPROCESSOR BOARD
POWER CIRCUITS FSC4C CONTROLLER
FOXBORO 873 PH/ORP ANALYZER
FOXBORO 7925050IC MODULE
FOXBORO I/A P0901VK 80MB HARD DRIVE AP20 S/W
FOXBORO I/A P0400ZG NODE BUS INTERFACE (NBI)
FOXBORO I/A P0901VK 80MB HARD DRIVE W/ AP20
FOXBORO I/A P0400VT AP20 APPLICATIONS PROCESSOR 20
FOXBORO I/A P0400QK PER TAPE W/CONT
FOXBORO F6501A-A RS485-RS232 Converter
FOXBORO CM400YR-0C I/A SERIES
FOXBORO DM400YP-0A I/A SERIES
