盛年不重来,一日难再晨,及时当勉励,岁月不待人。——陶渊明
安全地或电源接地:将电源线接地端和柜体连线接地为安全接地。如电源漏电或柜体带电,可从安全接地导入地下,不会对人造成伤害。
系统接地:PLC控制器为了与所控的各个设备同电位而接地,叫系统接地。接地电阻值不得大于4 Ω,一般需将PLC设备系统地和控制柜内开关电源负端接在一起,作为控制系统地。
信号与屏蔽接地:一般要求信号线必须要有惟一的参考地即“单点接地”,屏蔽电缆遇到有可能产生传导干扰的场合,也要在就地或者控制室**接地,防止形成“地环路”。信号源接地时,屏蔽层应在信号侧接地;不接地时,应在PLC侧接地;信号线中间有接头时,屏蔽层应牢固连接并进行绝缘处理,一定要避免多点接地;多个测点信号的屏蔽双绞线与多芯对绞总屏蔽电缆连接时,各屏蔽层应相互连接好,并经绝缘处理,选择适当的接地处单点接点。
FURNAS ELECTRIC CO 3SB03-2MHC1
FURNAS ELECTRIC CO 3SB03-2MKB
FURNAS ELECTRIC CO 3SB03-2MKBX2
FURNAS ELECTRIC CO 3SB03-P
FURNAS ELECTRIC CO 3SB03-P4
FURNAS ELECTRIC CO 3SB03-PEB
FURNAS ELECTRIC CO 3SB03-PEG
FURNAS ELECTRIC CO 3SB03-PFE
FURNAS ELECTRIC CO 3SB03-PFR11
FURNAS ELECTRIC CO 3SB03-PPR
FURNAS ELECTRIC CO 3SB03-UPFC
FURNAS ELECTRIC CO 3SB04-CBH
FURNAS ELECTRIC CO 3SB0A-LCGP
FURNAS ELECTRIC CO 3SB0A-LFG
FURNAS ELECTRIC CO 3SB1-000-0AB20
FURNAS ELECTRIC CO 3SB1-000-0AC01
FURNAS ELECTRIC CO 3SB1-000-0AE01
FURNAS ELECTRIC CO 3SB1-000-0AF01
FURNAS ELECTRIC CO 3SB1-000-0AF20
FURNAS ELECTRIC CO 3SB1-000-0AV40
FURNAS ELECTRIC CO 3SB1-000-0AW01
FURNAS ELECTRIC CO 3SB1-000-0AW41
FURNAS ELECTRIC CO 3SB1-000-0LC01
FURNAS ELECTRIC CO 3SB1-000-1AB01
FURNAS ELECTRIC CO 3SB1000-1BC32
FURNAS ELECTRIC CO 3SB1-000-2AB01
FURNAS ELECTRIC CO 3SB1-000-2DB01
FURNAS ELECTRIC CO 3SB1-000-2DB32
FURNAS ELECTRIC CO 3SB1-000-2DC01
FURNAS ELECTRIC CO 3SB1-000-2EB01
FURNAS ELECTRIC CO 3SB1-000-2EB01
FURNAS ELECTRIC CO 3SB1000-4LB20
FURNAS ELECTRIC CO 3SB1-000-4PB01
FURNAS ELECTRIC CO 3SB1-000-7CH07
FURNAS ELECTRIC CO 3SB1001-0AC01
FURNAS ELECTRIC CO 3SB1-001-0AE01
FURNAS ELECTRIC CO 3SB1-001-0AF20
FURNAS ELECTRIC CO 3SB1-001-6CC06
FURNAS ELECTRIC CO 3SB1-001-6CE06