XStream™
OEM
RF
Module
–
Product
Manual
v5.x00
[2006.02.24]
Wiring Diagram: RS-422
Figure
B
‐
21.
XStream
Module
Assembly
in
an
RS
‐
485
(4
‐
wire)
environment
RS
onnection Guidelines
-485/422 C
The RS-485/422 protocol provides a solution for wired communications that can tolerate high
oise and push signals over long cable lengths. RS-485/422 signals can communicate as far as
4000 feet (1200 m). RS-232 signals are suitable for cable distances up to 100 feet (30.5 m).
odes can be connected. The RS-422
Suggestions for integrating the XStream Module with the RS-485/422 protocol:
n
RS-485 offers multi-drop capability in which up to 32 n
protocol is used for point-to-point communications.
1. When using Ethern twisted pair cabling: Select wires so that T+ and T- are connected to
et
each wire
lect wires so that R+
ected to a
in a twisted pair. Likewise, se
and R- are conn
twisted pair. (For example, tie the green and white/green wires to T+ and T-.)
2. r
straight-through
Ether
cross-ov
Fo
ne
not
t cable (
er cable) – The following wiring pattern
works well: Pin3 to T+, Pi
to R-, Pin6 to T-
n4 to R+, Pin5
3.
te that th
ecting cabl
equires 4 w
No
e conn
e only r
ires (even though there are 8 wires).
4.
en using phone cabling
n2 in the cable maps to Pin3 on opposite end of cable
Wh
(RJ-11) – Pi
and Pin1 map
Pin4 res
s to
pectively.
Figur
‐
22
Mal
)
DB
‐
9
to
pters
igure
B
‐
23.
Female
(green)
DB
‐
9
to
RJ
‐
45
Adapters
e
B
e
(yellow
RJ
‐
45
Ada
F
©
2006
MaxStream,
Inc.
Confidential
and
Proprietary
61
electronic components distributor