DCS系统接地是为了保证当进入DCS系统的信号、供电电源或DCS系统设备本身出现问题时，有效的接地系统能承受过载电流并可以迅速将过载电流导入大地。接地系统能够为DCS提供屏蔽层，消除电子噪声干扰，并为整个控制系统提供公共信号参考点（即参考零电位）。

当接地系统发生问题时(接地电阻过大，多点接地，接地线断线或接地线与高电压、大电流设备相接触等)，会造成人员的触电伤害及设备的损坏，据了解，有些DCS系统经常“死机” (或不明原因的“死机”)，大多是因为接地系统不良或存在问题所引起的。因此，完善、可靠、正确的接地，是DCS系统能够安全、可靠和良好运行的关键。
在一般情况下，DCS控制系统需要两种接地：保护地和工作地（逻辑地、屏蔽地等）。对于装有安全栅防爆措施的系统如化工行业所用的系统，还要求有本安地。
2.1保护地（CG，Cabinet Grounding）
DSDP150是为了防止设备外壳的静电荷积累、避免造成人身伤害而采取的保护措施。DCS系统所有的操作员机柜、现场控制站机柜、打印机、端子柜等均应接保护地。保护地应接至厂区电气专业接地网，接地电阻小于4Ω。


PFEA111-20  PFEA111-20  PFEA111-20
PFEA111-20  PFEA111-20  PFEA111-20

LORAD RT 125 X-RAY SYSTEM

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL L

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL m

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL p

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL n

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL q

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL r

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL o

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL c

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL b

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL m

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL e

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL f

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL g

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL i

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL j

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL k

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM w/DIGITAL

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM w/DIGITAL

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM w/DIGITAL

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM w/DIGITAL

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM w/DIGITAL

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM DIGITAL l

DENTAL PORTABLE MOBILE X - RAY MACHINE SYSTEM w/DIGITAL

DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL b8

DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL b9

DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL c1

DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL c2

DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL a1

DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL a2

DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL a3

DENTAL PORTABLE MOBILE X- RAY MACHINE SYSTEM DIGITAL a4

Image Systems - X Ray Monitor model M21P-H5101 21"