IDEMIA DOCUMENT
– REPRODUCTION AND DISCLOSURE PROHIBITED
RS-422 Communication
IDEMIA - 2017_2000024419
– V4
12
7
RS422/485_GND
Black / Red
12
R
Blue / Black
10
RS422/485_TX-
Green / White
11
RS422_RX-
Blue / White
12
RS422/
Green / Black
St
ep
three
:
c
om
m
unic
at
ions
RS-232
from the
Com Port
RS-232 to
RS-422
converter
RS-422 to
1200m (4000ft)
The maximum total cable length is 4000 ft. (1200m).
The cable must be dedicated to this installation and not used for any other purpose
For RS-422 installations, the cable should be run in a point to
point configuration (i.e. PC > converter > terminal)
Use CAT-5 UTP (or better) cable (shielded recommended)
with a impedance of 120
. AWG 24 should be the minimum
wire gauge used.
Choose one twisted pair of conductors to use for RS422/ (Green / Black wire - 12) and RS422/485_TX- (Green /
White wire - 10).
Choose one twisted pair of conductors to use for R (Blue / Black wire - 12) and RS422_RX- (Blue / White wire -
11).
Another conductor should be used for Signal Ground (Black / Red wire - 7).
