Rs422 Connection - Nedap TRANSIT Entry Installation Manual

3.2.2 RS422 CONNECTION

The TRANSIT Entry has an on-board RS422 interface. The communication protocol,
baud rate, data format and flow control depend upon the reader firmware. See
firmware manual for details.
The RS422 interface is similar to the RS232 interface. The RS422 interface is
commonly used where longer cable lengths are required.
Connections:
RX+
Receive line (positive)
RX-
Receive line (negative)
GND
Ground
TX+
Transmission line (positive)
TX-
Transmission line (negative)
RX+ and RX- inputs are terminated with a 120Ω resistor.
TX+ and TX- must be terminated at the host side.
Note 1: Maximum cable length 1200 meters (
Note 2: Enable the on-board RS422 interface by setting DIP-switch SW1-2 to OFF.
See chapter 4.2 for details.
Note 3: The RS422 interface is disabled while the USB interface is in use !!!
Figure 9: RS422 wiring
© Nedap IDEAS, P.O. Box 103, NL-7140 AC GROENLO
).
4000 feet
HOST
K4
TRANSIT Entry
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