7I90HD 10
CONNECTORS
RS-422 CONNECTOR
J1 is the 7I90HDs RS-422 serial interface. J1 is a RJ-45 jack. The serial interface
pinout is compatible with standard 8 wire CAT5 Ethernet cables. J1 pinout is as follows:
PIN
SIGNAL
DIR
EIA/TIA 568B COLOR
1
RXA
TO 7I90HD
ORANGE WHITE
2
RXB
TO 7I90HD
ORANGE
3
TXA
FROM 7I90HD
GREEN WHITE
4
GND
EITHER
BLUE
5
GND
EITHER
BLUE WHITE
6
TXB
FROM 7I90HD
GREEN
7
+5V
EITHER
BROWN WHITE
(5V if W5 is up)
8
+5V
EITHER
BROWN
(5V if W5 is up)
J1s pinout is designed to match breakout cards like the 7I44 and 7I74. A standard
CAT5 or CAT5E cable can be used to connect the 7I90HD to a 7I44/7I74. CAT5E cable
is suggested if the serial cable is used for powering the 7I90HD, as the larger wire size
result in lower voltage drop.
