Rs-422 [ F ] 5T836-2; Configuring For Rs-422 Dual-State (Duplex Communications) - Raveon Tech Series Manual

3.5. RS-422
RS-422 communications uses 4-wire differential signals. The Tech Series 422 board
has the following pin configuration.
Pin # Name
MODE
1
2 Y+
3 Z-
4
B+
A-
5
6 GND

Configuring for RS-422 Dual-State (Duplex Communications)

The Tech Series enclosure will detect auto-detect the 422 Tech Series board and set
all necessary parameters to enable RS422 communication. The Tech Series hardware
connector is identical to the RS485 version.
Raveon's RS-422 I/O circuit uses 3.3V logic to drive the lines, and the RS422 pins are
ESD protected to ±15kV and 7kV human body model. Output is tri-state (0, 1, and
Open circuit). Tri-State is used for full duplex communications.
RS-422 installations typically have a termination resistor across the Input and the
Output lines. A value of 150 ohms should work in most applications.
Connect Pin 1 (MODE) to ground to enable the Full Duplex Dual-State operation.
Tech Series RS-485 Interface
[ F ] 5T836-2
Direction
Function
I T Mode
Out Out+
Out Out-
In
In
- Ground
Level / Specification
1(or Float)
to default to tri-state simplex mode.
0(ground
) to enable full duplex, dual mode output.
Non-inverting RS-422 data OUT line
Inverting RS-422 data OUT line
In+ Non-Inverting data INPUT pin
In- Inverting data INPUT pin
Connect to earth ground.
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Raveon Technologies Corp.