Black Box products can be conveniently purchased
through a broad range of qualified distributors
and resellers located around the globe.
Black Box delivers solutions from our manufacturing
Click here for our solution partner directory.
Get fast answers from one of our Experts.
Helping you is our priority at Black Box.
You can contact us by phone, fax, email, or chat with one of our Experts for immediate assistance.
Helping you is our priority at Black Box.You can contact us by phone, fax, or email with one of our Experts for immediate assistance.
A technical expert will call you within 30 seconds.
It's live and it's free.
Get fast answers
from one of our
Helping you is our priority at Black
Box. You can contact us by phone,
fax, or email with one of our Experts for immediate assistance.
We're available from 9:00 am - 5:30 pm
We're available from 9:00 am - 6:30 pm
We’ll respond in 60 seconds or less!
We'll answer in 60 minutes!
(8 AM-5 PM Eastern)
(24x7, 365 days a year)
Optical isolation protects your equipment from dangerous ground loops. A ground loop is a current across a conductor, created by a difference in potential between two grounded points, as in... more/see it nowequipment in two buildings connected by a run of RS-232 or other data line. When two devices are connected and their potentials are different, voltage flows from high to low by traveling through the data cable. If the voltage potential is large enough, your equipment wont be able to handle the excess voltage and one of your ports will be damaged. Ground loops can also exist in industrial environments. They can be created when power is supplied to your equipment from different transformers or when someone simply turns equipment on and off. Ground loops can also occur when there is a nearby lightning strike. During an electrical storm, the ground at one location can be charged differently than the other location, causing a heavy current flow through the serial communication lines that damage components.You cant test for ground loops. You dont know you have one until a vital component fails. Only prevention works. For data communication involving copper cable, optical isolation is key.With optical isolation, electrical data is converted to an optical beam, then back to an electrical pulse. Because there is no electrical connection between the DTE and DCE sides, an optical isolator unlike a surge suppressorwill not pass large sustained power surges through to your equipment. Since data only passes through the optical isolator, your equipment is protected against ground loops and other power surges. collapse
It says UL® listed, so it must be okay, right? Don’t be fooled. The $5.99 surge suppressor you picked up for your home PC may be nothing more than a... more/see it nowmultiple outlet extension cord.
UL® listed means that a product has been submitted to Underwriter’s Laboratories® for safety testing in certain categories. The strip protector you just bought is probably listed in the extension cord category. It won’t stop harmful surges from destroying equipment data.
The UL® listing for surge suppressors is UL® 1449. APC® SurgeArrest® products received the best UL® 1449 rating. Some vendors rate surge protection on the basis of joule energy. But let-through should be compared.
Basically, let-through is a measure of how much of a spike or surge each protector will let though to your electronic equipment. The lower the let-through rating, the better the suppression. And the SurgeArrest is guaranteed forever—even if it takes a catastrophic hit. It may be the last surge protector you buy. collapse
Delivering superior technical support is our highest priority. Depending on the products or services we provide for you, please visit your appropriate support area.
You have added this item to your cart.
Important message about your cart:
You requested more of "" than the currently available. The quantity has
been changed to them maximum quantity available. View your cart.