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.
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