E800DU,1SAX811001R0001 ABB

ABB 3ASC25H208
ABB A9-30-10,AC220V
ABB SDCS-IOB-3-COAT 3ADT220090R0020
ABB SDCS-IOB-22-COAT 3ADT220090R0013
ABB 8018545 PUMP, 4N, 230 V, 50/60 HZ

分类: 标签:

Description

接地系统混乱对PLC系统的干扰主要是各个接地点电位分布不均,不同接地点间存在地电位差,引起地环路电流,影响系统正常工作。例如电缆屏蔽层必须一点接地,如果电缆屏蔽层两端A、B都接地,就存在地电位差,有电流流过屏蔽层,当发生异常状态如雷击时,地线电流将更大。

Nokia NIF4536FRU NIF4536 2 Port 10G IP2450 IP1280
90 Day Hardware Warranty – Free Overnight Shipping!

Juniper NS-ISG-TX4 I/O Mod 4-port mini GBIC-TX ISG1000
90 Day Hardware Warranty – Free Shipping!

Juniper DX-3250SLB-SSL-​S-2C Load Balancer App Accel
90 Day Warranty – Free Shipping If You Buy it Now

Extreme Networks Black Diamond 6808 MSM64i WDMi Switch
90 Day Warranty – We Accept Corporate PO’s