Description
这就是SDSL(Symmetric Digital Subscriber Line)技术。其显著优点在于:电话通畅,网络也就通畅。因而维护简单。另外,这种技术在已经有电话总机的情况下即可使用,而省去重复布线费用。SDSL(Symmetric Digital Subscriber Line)技术现在国外已广泛用于工厂网。如果企业比较小,可以不用光纤,全部用电话线,通讯速率为2.3M。无论从信息端读取数据还是传到信息端的指令速率是一样的。
G E CONTACTOR, 30A, EXPANDABLE TO 12 POLE MECH. HELD
ALLEN BRADLEY 1336-B003-ECD-F?C3-L1-S1 ADJ FREQ DRIVE
SQUARE D COMBINATION STARTER 15 AMP SIZE 1 3 POLE 600V
Gould Shawmut Amptrap CL Form 480 A4BY 1000
SQUARE D POWER FACTOR CAPACITOR 7.5 KVAR 480 VOLTS 3 PH
ITE CIRCUIT BREAKER 400 AMP FRAME ONLY NO TRIP 600 VOLT
G E HEAVY DUTY SAFETY SWITCH 100A 600V 3P 3W NO-F
UTICOR BROADCAST DISPLAY PMD300
SQUARE D I LINE BREAKER 30 AMP 3 POLE 600 VAC FA36030
HAMMOND POWER SOLUTIONS TRANSFORMER 1 KVA Q1COYEKB
GENERAL ELECTRIC MOLDED CASE CIRCUIT BREAKER 125A 600V
GENUINE MOYNO DRIVE SHAFT STAINLESS STEEL