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)
A dry contact, also called a volt-free contact, is a relay contact that does not supply voltage. The relay energizes or de-energizes when a change to its input has occurred.... more/see it nowIn other words, a dry contact simply detects whether or not an input switch is open or closed.
The dry contacts in the ServSensor Contact provide a simple two-wire interface that can be easily adapted to third-party sensors and devices. Because you define what the open or closed condition means, dry contacts are infinitely adaptable.
Use dry contacts to monitor alarms such as fire alarms, burglar alarms, and alarms on power systems such as UPSs. A very common use for dry contacts is to detect whether a cabinet door is open or closed.
There are a lot of misconceptions and myths surrounding Power over Ethernet (PoE). Learn what PoE is—and is not—and clarify how it can be an important part of your network.
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.