Antenna Placement; Serial Interface; Table 2-4 Premierwave 2050 Serial Port Signals - Lantronix PremierWave 2050 Integration Manual

Antenna Placement

When designing the PremierWave 2050 to a mating board, it is important to consider the final
installation of the module and its location with respect to connecting access points. The
antenna should be placed so that it has as clear as possible path to the connecting access
point for maximum range. Avoid placing the antenna such that it is blocked by metal walls or
ground planes of adjacent circuit boards.

Serial Interface

The PremierWave 2050 has two external serial interfaces. The signal levels on the serial
interface are 3.3V tolerant. The serial interfaces require an external transceiver in order to
connect to external RS232, RS485, or RS422 networks. The signals of the Serial Ports may be
connected as shown in the reference schematic below. The transceiver shown in the
reference schematic is an Exar product, part number SP336. This transceiver is a multiprotocol
RS232, RS485, RS422 transceiver. Single protocol transceivers may be used as required.
The PremierWave 2050 interface may also be directly connected to the UART interface of an
external CPU.
Signal
TXD1
RTS1
RXD1
CTS1
TXD2
RTS2
RXD2
CTS2
PremierWave® 2050 Through-Hole Adapter Integration Guide

Table 2-4 PremierWave 2050 Serial Port Signals

Module Pin Description
5 Serial transmit data output
7 Serial ready-to-send / serial transmit enable output
9 Serial receive data input
11 Serial clear-to-send input
21 Serial transmit data output 2
23 Serial ready-to-send / serial transmit enable output
25 Serial receive data input 2
27 Serial clear-to-send input
2: Functional Description
16