RS-422 Converters, Adapters, Boosters, Repeaters,
Isolators,
Accessories and Tech Data
Do you need to connect two devices with RS-232 ports but
the distance between them is too great? Do you have a point-to-point
serial link that has to operate at data rates higher than
RS-232 can provide? Is your application in an electrically
noisy environment? B&B Electronics has RS-422 cards, converters,
adaptors and optical isolators that will solve your problem
easily and cost-effectively. We also have a technical library
with all the articles, applications notes, FAQs and illustrations
you need to understand and apply RS-422 in your situation.
You also can contact our Technical Support team and they will
be happy to help.
B&B Electronics RS422 Products
RS-422 Quick
Facts
RS-422 is a point-to-point serial communications standard
that defines a differential (or balanced) interface using
two separate wires for each signal. Differential signals on
twisted pair cables allow very high data rates in environments
despite electrical noise and varying ground potentials. Signal
levels are compatible with RS-485 so equipment is often configurable
for either standard. The RS-422 standard does not define mechanical
connections or assign pin numbers, but often DB-9 connectors
are used. Typically, two wire pairs are used to accomplish
two-way communications.
In some cases hardware handshake lines (RTS, CTS) are included
in an RS-422 interface. Each signal requires one twisted pair.
RS-422 Tech Tip: Always run a signal ground
with RS-422
| Typical Data rates: |
115,200 bps (10Mbps over short distances) |
| Max Distance: |
4000 feet |
| Cabling Requirements: |
2 twisted pair (1 TD, 1 RD) plus signal ground |
| Typical Line Designations |
Line A and Line B |
| Fan out |
1 transmitter can drive up to 10 receivers |
| Typical Signal Levels |
Mark: VAB = –5 V, Space: VAB = +5 V (differential) |
| Signal Logic |
Mark – Line A negative with respect to Line B |
|
Ethernet
Accesories