Digi XStream-PKG-R RS-485 Manual descargar pdf (Pagina 7)

XStream-PKG-R™ RS-232/485 RF Modem – Product Manual v5.x00

2. Interfacing Protocol

The XStream-PKG-R RF Modem supports the following interfacing protocols:

• RS-232

• RS-485 (2-wire) Half-Duplex

• RS-485 (4-wire) and RS-422

2.1. RS-232 Operation

2.1.1. DIP Switch Settings and Pin Signals

Figure 2.1. Figure 2.2.

RS-232 DIP Switch Settings Pins used on the female RS-232 (DB-9)

Serial Connector

DIP Switch settings are read and applied

only while powering-on.

Table 2.1. RS-232 Signals and their implementations on the XStream RF Modem

(Low-asserted signals are distinguished by horizontal line over pin name.)

DB-9 Pin

RS-232

Name

AT Command

Reference*

Description Implementation

DCD

DO3

Data-Carrier-Detect

Connected to DSR (pin6)

RXD

Received Data

Serial data exiting the RF Modem (to host)

TXD

Transmitted Data

Serial data entering into the RF modem (from host)

DTR

DI3

Data-Terminal-Ready

Can enable POWER-DOWN on the RF Modem

GND

Ground Signal

Ground

DSR

DO3

Data-Set-Ready

Connected to DCD (pin1)

CMD

DI2 Request-to-Send

Provides flow control or

enables “Command Mode” on the RF Modem

DO2

Clear-to-Send

Provides flow control

9 RI - Ring Indicator

Optional power input that is connected internally to

the positive lead of the front power connector

* Inside the XStream RF Modem is an XStream OEM RF Module. The names in this column refer to the pin

signals of the embedded RF module. XStream Commands (p24) used to configure pin behaviors are named

according to the pins of the module, not the RS-232 connection pins.

1 2 3 4 5 6 7 8 9 10 11 12 ... 59 60

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