Black Box MDR29x Bedienungsanleitung

MDR29x Wireless 900 MHz Modem

User’s Manual

Version 1.5

1000 Park Drive - Lawrence, PA 15055-1018

Website: www.blackbox.com Email: [email protected]

Order Toll Free in the US: Call 877-877-BBOX (Outside the US call 724-746-5500)

DOCUMENT INFORMATION

The information contained in this manual and the accompanying software programs are copyrighted and all rights are

reserved by Black Box, Inc. Black Box, Inc. reserves the right to make periodic modifications of this product without

obligation to notify any person or entity of such revision. Copying, duplicating, selling, or otherwise distributing any

part of this product or accompanying documentation/software without the prior consent of an authorized

representative of Black Box, Inc. is strictly prohibited.

All brands and product names in this publication are registered trademarks or trademarks of their respective holders.

This material is preliminary

Information furnished by Black Box in this specification is believed to be accurate. Devices sold by Black Box are

covered by the warranty and patent indemnification provisions appearing in its Terms of Sale only. Black Box makes

no warranty, express, statutory, and implied or by description, regarding the information set forth herein. Black Box

reserves the right to change specifications at any time and without notice.

Black Box’s products are intended for use in normal commercial and industrial applications. Applications requiring

unusual environmental requirements such as military, medical life-support or life-sustaining equipment are specifically

not recommended without additional testing for such application.

Limited Warranty, Disclaimer, Limitation of Liability

For a period of one (1) year from the date of purchase by the OEM customer, Black Box warrants the OEM transceiver

against defects in materials and workmanship. Black Box will not honor this warranty (and this warranty will be

automatically void) if there has been any (1) tampering, signs of tampering; 2) repair or attempt to repair by anyone

other than an Black Box authorized technician.

This warranty does not cover and Black Box will not be liable for, any damage or failure caused by misuse, abuse,

acts of God, accidents, electrical irregularity, or other causes beyond Black Box’s control, or claim by other than the

original purchaser.

In no event shall Black Box be responsible or liable for any damages arising: From the use of product; From the loss

of use, revenue or profit of the product; or As a result of any event, circumstance, action, or abuse beyond the control

of Black Box, whether such damages be direct, indirect, consequential, special or otherwise and whether such

damages are incurred by the person to whom this warranty extends or third party.

If, after inspection, Black Box determines that there is a defect, Black Box will repair or replace the OEM transceiver at

their discretion. If the product is replaced, it may be a new or refurbished product.

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MDR29X RF TRANSCEIVER 1

The MDR29x 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 of the box. Housed in a compact and rugged die-cast enclosure, the radio

is equipped to replace miles of serial cable using an RS232, RS485, or USB interface.

MDR29X FEATURES

NETWORKING AND SECURITY

• 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

EASY TO USE

• 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

OVERVIEW

The MDR29x uses Frequency Hopping Spread Spectrum modulation, where the units "hop" from frequency

to frequency many times per second using a 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.

MDR29x 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).

MDR29x’s 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 Black Box MDR29x configuration software enables custom configurations based on unique

application requirements.

CHAPTER 1 - MDR29X RF TRANSCEIVER 2

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This document contains information about the hardware and software interface between an Black Box

MDR29x transceiver and an OEM Host. Information includes the theory of operation, specifications,

interface definition, configuration information and mechanical drawings. The OEM is responsible for

ensuring the final product meets all appropriate regulatory agency requirements listed herein before selling

any product.

Note: MDR29x 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

MDR29x is connected) will be referred to as “OEM Host”.

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SPECIFICATIONS 2

TABLE 1: MDR29X SPECIFICATIONS

INTERFACE

Serial Interface Connector DB-9 Male (RS-232), Terminal Block (RS-485), Type B USB (USB)

RF Connector RPSMA Jack

Serial Interface Data Rate Baud rates from 1200 bps to 115,200 bps

Power Consumption (typical) 400 mA @ 12VDC

Channels 32 (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: 256 bytes each

OPERATIONAL

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)

MDR292/4A: 743mW typical 1486mW typical

MDR291A: 100mW typical 200mW typical

Supply Voltage MDR292/4A: 7-18VDC

MDR291A: USB Supplied 5V

Sensitivity -100dBm typical @ 76.8kbps RF Data Rate

Range, Line of Site (based on

3dBi gain antenna) MDR291A: Up to 4 miles

MDR292/4A: Up to 20 miles

ENVIRONMENTAL

Temperature (Operating) -40°C to 80°C

Temperature (Storage) -50°C to +85°C

PHYSICAL

Dimensions 4.4 x 2.7 x 1.4 inches

Weight 6 oz (170 g)

CERTIFICATIONS

FCC Part 15.247 MDR291A: KQLAC4490-100

MDR292/4A: KQLAC4490

Industry Canada (IC) MDR291A: 2268C-AC4490

MDR292/4A: 2268C-AC44901000

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SERIAL INTERFACE 3

The MDR29x supports RS232, RS485, and USB protocols (seperate products). Black Box wireless solutions

are not subject to the cabling restrictions for distance, and either interface is available when ordering.

Figure 1: MDR29x Status LEDs

TABLE 2: STATUS LEDS

LED COLOR DESCRIPTION

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 MDR29x is receiving data.

TXD Red When flashing, indicates that the MDR29x is transmitting data.

Figure 2: MDR292A Figure 3: MDR294A

Figure 4: MDR291A

RPSMA Antenna Connector

Status LEDs

Pwr Link Rx Tx

Power ConnectorDB9 Male Connector

Power Connector

Terminal Block

USB Type B

connector

CHAPTER 3 - SERIAL INTERFACE 5

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RS232 - MDR292A

RS232 is a single-ended data transmission protocol. The RS232 signals are represented by voltage levels

with respect to a 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.

INTERFACING TO OTHER RS232 EQUIPMENT

The MDR292A is a DCE (Data Communications Equipement) device. Typically devices like PC’s are

considered DTE (Data Terminal Equipment) devices while periphial devices are classified as DCE. A DCE

device can be interfaced to a DTE device using a straight through serial cable. When interfacing two DCE or

TABLE 3: MDR29X DB9 MALE CONNECTOR PINOUT

DB9 PIN SIGNAL NAME DESCRIPTION

1DCD Data Carrier Detect

2RXD Received Data

3TXD Transmitted Data

4DSR Data Set Ready

5GND Ground

6DTR Data Terminal Ready

7CTS Clear To Send

8RTS Request To Send

9RI Ring Indicator

CHAPTER 3 - SERIAL INTERFACE 6

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two DTE devices together, a null modem cable is required to swap the pins and convert the signals

accordingly.

Figure 5: DTE to DCE Interface Figure 6: DCE to DCE Interface

J1 J2 SIGNAL

Figure 7: DB9F to DB9F Straight Through Cable

1 1 DCD

2 2 RXD

3 3 TXD

4 4 DTR

5 5 GND

6 6 DSR

7 7 RTS

8 8 CTS

9 9 RI

Shell Shell GND

MDR292A Modem (DCE)RS232 Device (DTE)

CTS

RTS

TXD

RXD

GND

DCD

DTR

DSR

CTS

RTS

TXD

RXD

GND

DCD

DTR

DSR

MDR292A Modem (DCE)RS232 Device (DTE)

CTS

RTS

TXD

RXD

GND

DCD

DTR

DSR

CTS

RTS

TXD

RXD

GND

DCD

DTR

DSR

NC NC

1.70 72.00

1.70

CHAPTER 3 - SERIAL INTERFACE 7

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J1 J2 SIGNAL

Figure 8: DB9M to DB9 Female Null Modem Cable

1N/C DCD

2 3 RXD

3 2 TXD

4 6 DTR

5 5 GND

6 4 DSR

7 8 RTS

8 7 CTS

9N/C RI

Shell Shell GND

1.70 72.00

1.70

If you previously used a straight through cable to connect your PC to your device, you’ll

need to use a null modem cable or adapter to connect the MDR292A to that device.

DESIGN TIP

CHAPTER 3 - SERIAL INTERFACE 8

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RS485 - MDR294A

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 MDR294A 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 MDR294A does not have a RS-485 address, therefore, it will transmit all RS-485 traffic over the RF.

Conversely, as soon as a MDR294A receives a packet over the RF, it will transmit the packet over the RS-

485 bus.

Note: When using RS485 (2-wire Half Duplex), a RS485 to RS232 converter is required to configure the

unit.

Figure 9: RS232-485 Converter

TABLE 4: MDR29X TERMINAL BLOCK PINOUT

TERMINAL

BLOCK PIN SIGNAL NAME DESCRIPTION

1VCC 6-18V (1.3A required)

2485 - 485B

3N/C No Connect

4N/C No Connect

5485 + 485A

6GND Ground

+5V

GND

B-

A+

RS232

RS485

Power Connector

Terminal Block

RS232-485 Converter

MDR294A

485 -

485 +

Many simple 2 or 4-wire converters do not provide hardware flow control capabilities and

therefore require Handshaking to be disabled in the Black Box Configuration Utility to

configure the radio. Check with your converter Manufacturer for any specific requirements.

DESIGN TIP

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