Raveon RF Neulink NL900PRO Manuel utilisateur

NL900PRO

User Manual

Ver

ion B0

Radio Data Modem

With Selectable

RS232 RS485 RS422

7610 MIRAMAR ROAD

San Diego

CA 92126

(

800) 233-1728

www.

rfneulink

sales@rfneulink

C U M E N T I N

F O R M A T I O N

Copyr

t ©

2013 Raveon Technologies

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al is preliminary

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to b

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are spe

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Disclaimer

tion of

ility

For

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of one

(1) year fr

om the date o

ase

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M custom

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arrants

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ansceiver

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cts in mater

als and workmanship. Raveon Technologies will not honor this

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oduct is

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N L 9 0 0 P R O R F T R A N S C E I V E R 1

The NL900PRO transceiver is a Frequency-Hopping Spread Spectrum FHSS) radio designed for license-free

operation in the

900 MHz ISM

band. The radio sustains a standard asynchronous serial data stream

between

two or

more radios out

the box.

Housed in a compact

and

rugged die-cast

enclosure, the radio

is equipped to replace

miles of serial cable using a selectable RS232, RS485, or RS422 interface.

N L 9 0 0 P R

F E A

U R E S

N E T W O R K I

N G A N D S E C U R I T Y

•

Retries and Acknowledgements

•

API Commands

to control packet routing and

acknowledgement on a packet-by-packet basis

•

Frequency Hopping Spread Spectrum for security

and interference rejection

•

Customizable RF Channel number and system ID

•

Dynamic link

analysis, remote radio discovery

•

Low latency and

high throughput

E A S

Y T O

•

Continuous

76.8 kbps

RF data stream

•

Software selectable interface baud rates from 1200 bps to 115.2 kbps

•

Advanced configuration available using AT commands

O V E R

V I E W

The NL900PRO uses Frequency Hopping Spread

Spectrum modulation, where the units "hop" from frequency

to frequency many times per

second using

specific hop pattern applied to all the transceivers in the same

network. A distinct hopping pattern is provided for each Channel

Number, thereby allowing multiple

networks to co-exist in

the same area without interference.

NL900PRO transceivers operate in a Point-to-Point or Point-to-Multipoint, Client-Server architecture. One

transceiver is configured as a Server

and there can be one or many

Clients. To establish communication

between transceivers, the Server emits a beacon and upon detecting a beacon, RF link is established with

the Client s).

NL900PRO implement a proprietary

communication protocol to provide secure data transmissions. The use

of FHSS technology ensures data reliability over long

distances. Use of

license free frequency bands ensure

that the units are ready for

use with no further certification requirements.

Each unit

is small

and easily portable for use in

mobile and temporary settings as well as for fixed

installations. The NL900PRO configuration software enables

custom configurations based on

unique

application requirements.

T E R 1

- NL900P R O R F

T R A N S

E I V

This document contains information about

the hardware

and software

interface between an Raveon

Technologies NL900PRO transceiver and an OEM Host. Information includes the theory of operation,

specifications, interface definition, configuration information and

mechanical drawings. The OEM

responsible for ensuring the final product meets all appropriate regulatory agency requirements listed herein

before selling any product.

Note: NL900PRO modules will be

referred

to as the “radio” or “transceiver”. Individual naming is used to

differentiate product specific features. The host (PC Microcontroller or any device to which the NL900PRO is

connected) will be referred to as “OEM Host”.

S P E C I F I C A T I O N S 2

T A B L E 1 : N L 9 0 0 P R O S P E C I F I C A T I O N S

I N T E R

A C E

Serial Interface Connector

DB-9 Female

RF Connector

RPSMA Jack

Impedance

50 ohms unbalanced

Serial Interface Data Rate

Baud rates from 1200 bps to 115,200 bps

Power Consumption typical)

400 mA @ 12VDC

Channels

52 USA); 7 Australia)

Supported Network Topologies

Point-to-Point, Point-to-Multipoint

Security

One byte System ID. 56-bit DES encryption key.

Interface Buffer Size

Input/Output:

1600 bytes each

O P E R A T

I O N A L

Frequency Band

902 – 928 MHz USA); 915-928 MHz Australia)

RF Data Rate

76.8 kbps fixed

RF Technology

Frequency Hopping Spread Spectrum

Output Power

Conducted no antenna)

EIRP 3dBi gain antenna)

NL900PRO:

743mW typical

1486mW typical

Supply Voltage

NL900PRO:

7-28VDC

Sensitivity

-100dBm typical @ 76.8kbps RF Data Rate

Range, Line of Site based on

3dBi gain antenna)

NL900PRO:

Up to 20 miles

E N V I R O N M E N

T A L

Temperature Operating)

-40

C to 80

Temperature Storage)

-50

C to +85

Y S I C A L

Dimensions

4.4 x 2.7 x 1.4 inches

Weight

6 oz 170 g)

C E R

I F I C A T I O N S

FCC Part 15.247

NL900PRO:

KQLAC4490

Industry Canada IC)

NL900PRO:

2268C-AC44901000

S E R I A L I N T E R F A C E 3

The NL900PRO supports RS232,

RS485,

and

RS422 protocols.

Raveon Technologies

wireless solutions are

not

subject to the cabling restrictions for distance,

and either interface is available when ordering.

F i g u r e

N L 9 0 0 P R O S

u s

L E D s

Status LEDs

DIP Switch

RPSMA Antenna Connector

Pwr

Link

2 3

T A B L E 2 : S T A T U S L E D S

L E D

C O

D E S

C R I P T I O N

Pwr

Green

On indicates that the unit is powered up.

Link

Red

On indicates that the Client unit s) and Server

unit are in range of

each other. Client units activate the Link LED when in Range of the

Server unit. Always lit on a Server unit.

RXD

Green

When flashing, indicates that the NL900PRO is receiving data.

TXD

Red

When flashing, indicates that the NL900PRO is transmitting data.

F i g

r e 2

N L 9 0 0 P R O D I P S w i ch

S e i n g s

2 3 4 5 6

Serial In erface

TX/RX Mode

1 2 5 6

RS232

RS485/422 Termina ion

3 4

Client Addressed

Client Broadcast

Forced 9600

2 wire

RS485

4 wire

RS485/422

None

2 wire RS485

termination

4 wire RS485/

422 termination

Server Addressed

Server Broadcast

C H

A P T E R 3

- S

R I

A L

I N T E R F A C E

R S 2 3 2

RS232 is a single-ended data transmission protocol.

The RS232 signals are represented by voltage levels

with respect to

system common power/logic ground). The “idle” state MARK) has the signal level

negative with

respect to common, and the

“active” state SPACE) has the signal level positive with

respect to

common.

r e 3 :

R S 2

3 2 D I P S w i c h S e

i n g s

2 3

4 5 6

2 3

Normal RS232 Operation

Forced 9600 Mode

T A B L E 3 : N L 9 0 0 P R O R S 2 3 2 P I N O U T

D B

9 P I N

S I G N A

N A

M E

I / O

D E S C R I P T

I O N

D E T A I L

DCD

Data Carrier Detect

Carrier Detect Signal.

Connects to DSR pin 6).

Female DB9

TXD

Transmitted Data

Serial Data from modem

to Host.

RXD

Received Data

Serial Data from Host to

Modem.

DTR

Data Terminal Ready

Used to determine if

modem is ready for

operation.

GND

Ground

DSR

Data Set Ready

Connects to DCD pin 1).

RTS

Request To Send

Provides RTS Flow Control

CTS

Clear To Send

Provides CTS Flow Control

No Connect

C H

A P T E R 3

- S

R I

A L

I N T E R F A C E

R S

4 8

5 ( 2 -

E )

The

RS-485 interface uses a Differential

Data

Transmission

that

can help nullify the effects of ground

shifts

and induced noise signals that

can appear

as common mode voltages on a network.

The NL900PRO implements a RS-485 2-wire Half Duplex) multi-drop interface. Typically, a RS-485 bus will

consist of a master and several slaves. The nodes will have unique addresses and can send addressed

packets to specific nodes. Because the bus is half duplex, no two nodes should try to talk at the same time.

The

NL900PRO does

not have a RS-485 address, therefore, it

will transmit all RS-485 traffic over

the

RF.

Conversely, as

soon as

NL900PRO receives a packet

over the RF, it will transmit the

packet

over the RS-

485 bus.

F i g u r e

R S 4 8 5

H a

l f

D u p l e x

w i h

Termina ion

D I P

S w i ch

S e ings

2 3

With Termination

Without Termination

Termina

tion i

s a 1

20 ohm

resi

stor

between TR- a

d TR+.

T A B L E 4 : N L 9 0 0 P R O R S 4 8 5 P I N O U T

D B

9 P I N

I G N A L N A M E

D E S

C R I P T I O N

No Connect

Female DB9

TR-

Serial Data transmitted to &

received from radio

No Connect

GND

Ground

No Connect

TR+

Serial Data transmitted to &

received from radio

Power

Optional Power Input

An i

terna

l jumper must be configured in o

der

to use power

over

n 9.

C H

A P T E R 3

- S

R I

A L

I N T E R F A C E

R S 4 8 5 ( 4 - W I R E ) A N D R S 4 2 2

igure 5

RS4 85

Full D

uplex

wi h

T e r m i n a i o n D I P S w i ch

S e i n g s

2 3

With Termination

Without Termination

Termina

tion i

s a 1

20 ohm

resi

stor

T A B L E 5 : N L 9 0 0 P R O R S 4 2 2 P I N O U T

D B 9

P I N

S I G N A

N A

D E S

C R I P T I O N

No Connect

T-

Serial Data transmitted to radio

Female DB9

R-

Serial Data received by radio

No Connect

GND

Ground

No Connect

R+

Serial Data received by radio

T+

Serial Data transmitted to radio

Power

Optional Power Input

inter

nal jumpe

st be

confi

ured in

order to use power

over

n 9.

HAR

D W A R E F L O W

C O N T R O L

Flow control refers to the control

of data flow between the host and the NL900-PRO. It is the

method used to

handle data

in the transmit/receive buffer of

the NL900-PRO interface, and

determines how data flow

between

the

host and the NL900-PRO is throttled.

Often in

serial communication, one

device

is capable of

sending

data much faster than

the

other can receive. Flow

control

allows the slower

device

tell the

faster

device

to pause and resume

data transmission. Flow control CTS and RTS are used by the NL900-PRO and

its Host, locally -

NOT over t e air

. Therefore, one NL900-PRO cannot tell the

other to

slow

down or speed

up as is mentioned

above in the paragraph).

When the RTS Enable option is

selected on the Configuration Utility, the transceivers use hardware

flow

control to regulate data flow.

While using hardware flow control, the transceiver

that is ready to receive

data

sends a Clear

To Send signal to

its host or the device it is connected

to).

the

other hand,

when a

transceiver has something it wants

to send

to its host, it checks the state of Ready To Send

and if it is logic

low, will send data to its host. If

RTS is

logic high, it will not

send data to its host.

These signals are sent

apart from the data itself on separate wires.

C H

A P T E R 3

- S

R I

A L

I N T E R F A C E

Note: CTS

always enabled

by default. RS-485

Interface does

not

support Hardware

flow control.

DESIGN TIP

Can I implement a design using just Txd, Rxd and Gnd Three-wire Interface)?

Yes. However, it is strongly recommended that

your hardware monitor the CTS pin of the

radio. CTS is

taken High by

the radio when its interface buffer is getting full.

Your

hardware should stop sending at this point

to avoid a buffer overrun and subsequent loss

of data).

You can perform

a successful design

without monitoring CTS.

However, you

need to take

into account the amount of

latency the

radio adds to the

system,

any additional latency

caused by

Transmit

Retries or Broadcast Attempts, how often you send data, non-delivery

network

timeouts and interface data rate.

Polled

type networks, where

the Server host

requests data from

the

Client host and the Client host

responds, are good

candidates

for

avoiding

the use of CTS. This is because no one

transceiver can monopolize the RF

link.

Asynchronous

type

networks, where any

radio can send to another radio at any point

time, are much more difficult to implement without the use of CTS.

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