Black Box MDR210A-485 Manual de usuario

MDR210A-485

900 MHz. Frequency Hopping RS-485 Master/Slave auto-sensing

radio interface.

Black Box Corporation –Lawrence, PA -http://www.blackbox.com -Ph 877-877-BBOX -Fax 724-746-0746

Table of Contents

Description………………………………………………………………3

Features………………………………………………………………….4

Serial Port Scanning…………………………………………………5

Application Fields…………………………………………………….5

Networks…………………………………………………………………5

Module Address………………………………………………………..6

Data Validity…………………………………………………………6, 7

Glossary……………………………………………………………….7, 8

Application Notes………………………………………………..9, 10

Appendix A—Specifications..…………………………………….11

FCC Compliance…………….….…………………………………….12

Description

The MDR210A-485 uses an embedded 100-milliwatt, frequency-hopping

wireless modem that provides communication between a local RS485 network

and a remote network of RS485 connected devices. The MDR210A-485 will

automatically sense the direction of data flow and switch the RS485 and Radio

devices accordingly. The MDR210A-485 can be placed in a network of RS485

devices and appear as a slave repeater of remote RS485 devices or it can be

placed in a network of one or many RS485 slaves and act as the RS485 repeater

of a remote master. The radio operates within the 900 MHz ISM Band under

Part 15 of the FCC Rules and Regulations.

The MDR210A-485 operates at 19200 Baud at either odd parity or no parity.

Dipswitches select parity and one of 7 radio networks. Radios operating together

must have the same radio network address (1-7 set by switches labeled A0-A2).

Select a different radio network address to prevent interference from nearby

networks that are not sharing information. The default radio network for Rooftop

applications is 5. The user may choose another network address (1-7) if desired.

While all radios in a network must have the same network address, they do not

have to have the same parity. The parity is local to the RS485 serial port on the

MDR210A-485 only. Parity information is not transmitted or received.

Radio network selection 0 (A0, A1, A2 all set to 0) selects a special network

setup. When network address setting 0 is selected, the pre-programmed radio

network parameters are used. These parameters are user and application

specific and must be set at the factory for specific OEM applications.

The MDR210A-485 can also be used as a general purpose RS485 half duplex

radio interface operating at 19200 Baud at either odd or no parity (dip switch

selectable).

PARAMETER MIN TYP MAX UNITS

Supply Voltage 6.0 12 24 Volts

Supply Current 70 -200 mA

Baud Rate -19200 -Baud

PIN SIGNAL

DESCRIPTION

1TR-RS485 transmit/receive negative I/O

2TR+ RS485 transmit/receive positive I/O

3GND Common

Features

res

General Purpose

900 MHz. Spread Spectrum Frequency Hopping Transceiv

General MDR210A-485

Frequency Range 902 to 928 MHz., unlicensed ISM Band

Type Frequency Hopping Spread Spectrum Transceiver

Frequency Control Direct FM

Transport Protocol Transparent networking

Channel Capacity Hops through 25 channels. Up to 65,000 network identifiers.

Serial Data Interface Asynchronous RS232 levels. CMOS (TTL) Signals, 5V, 3.3V Tolerant

Serial Interface Baud

Rate Configurable from 2400-57600 bps

Data Throughput 9600 bps

Network Topology Point –multipoint, point-to-point multi-drop transparent networking

Performance

Channel Data Rate 10k or 20k bps respectively (vary with data rate)

Transmit Power Output 100mW

Rx Sensitivity -110dBm or –107dBm Respectively

Range* Indoor: 600’ to 1500’ Outdoor: 7 mi. with dipole, over 20 mi. with high gain antenna

Interface Rejection 70 dB at pager and cellular phone frequencies

*Range calculations are for 9600 baud line of sight. Actual range will vary based upon specific antenna selection and

environment

•

RS485 Master/Slave auto-sensing radio interface.

•Built in 900MHz frequency hopping radio for long-

range

wireless interface.

•Provides remote capability to RS485 Modbus networks.

•Automatically senses Master or Slave data flow.

•

Multiple radios allow many remote RS485 networks to coexist

logically.

•Provides means to connect legacy RS485 devices to wireless.

•Range Indoor: 600’ to 1300’

•Range Outdoor: 7mi. with dipole, >20 mi. w/high gain antenna.

•LED power and activity indicator.

•Configuration parameters set by dipswitch.

•Low power, 6-

24 VDC at 200 milliamp transmitting, 70 milliamp

receiving.

•

Astron AXH900RP SMA R Reverse Polarity SMA 6.5”

Antenna.

9XSTREAM-192/96 Radio

Introduction

The 9XSTREAM-192/96 radio is a 100-milliwatt frequency hopping wireless modem that

communicates with other equipment using a standard 19200 or 9600-baud asynchronous serial

data stream. The radio is half-duplex and can sustain a continuous data stream at the specified

data rate. The 9XSTREAM operates within the 900 MHz ISM Band under Part 15 of the FCC

Rules and Regulations.

IMPORTANT: The 9XSTREAM radio has been certified as a module by the FCC for integration

into OEM products without further certification being necessary (as per FCC section 2.1091.) The

OEM must satisfy the following requirements in order to comply with FCC regulations:

The system integrator must ensure that the external label provided with this device is placed on

the outside of the final product.

In order to comply with the FCC RF exposure requirements, the 9XSTREAM may be used only

with approved antennas that have been tested with this radio and a minimum separation distance

of 20 cm must be maintained from the antenna to any near by persons. The OEM must also

include a statement in the final product manual, informing users of the requirement to maintain 20

cm separation from the antenna to any near by persons. If the OEM integrates the 9XStream into

their final product, where the final product utilizes a non-approved antenna or is classified as a

portable device per FCC Section 2.1093 (less than 20 cm separation distance between the

antenna to any near by persons,) the OEM is responsible for obtaining a separate authorization

on the final product.

The 9XSTREAM radio requires a regulated 5-volt, 200mA supply for operation. Any voltage

higher than 5.5 volts will damage the radio.

Approved Antennas

Mfr Model Freq Gain Type Connector

Dimensions

Astron AXQ900 PTL 902-928 2dBi Omni MMCX 3”

Astron AXH900RP SMA R 902-928 2dBi Omni Reverse Polarity SMA 6.5”

MaxStream 900CDAN 902-928 2dBi Omni Integrated 3”

External Label:

This device contains transmitter module

FCC ID:OUR9XTREAM. The enclosed

device complies with Part 15 of the FCC Rules.

Operation is subject to the following two

conditions: (1) This device may not cause

harmful interference, and (2) this device

must accept any interference received,

including interference that may cause

undesired operation.

9XStream Frequency Hopping Data Radio

FCC Compliance Warning:

Changes or modifications to the 9XStream Data Radio not expressly approved by MaxStream,

Inc. could

void the user’s authority to operate this product.

Note: This equipment has been tested and found to comply with the limits for a Class B digital

device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable

protection against harmful interference in a residential installation. This equipment generates,

uses, and can radiate radio frequency energy and, if not installed and used in accordance with

the instructions, may cause harmful interference to radio communications. However, there is no

guarantee that interference will not occur in a particular installation. If this equipment does cause

harmful interference to radio or television reception, which can be determined by turning the

equipment off and on, the user is encouraged to try to correct the interference by one or more of

the following measures:

??Reorient or relocate the receiving antenna.

??Increase the separation between the equipment and receiver.

??Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

??Consult the dealer or an experienced radio/TV technician for help.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two

conditions:

1. This device may not cause harmful interference, and

2. This device must accept any interference received, including interference that may cause undesired

operation.

Antenna

Antenna Connector MMCX Female

Antenna Impedance 50 Ohms unbalanced

Approved Antennas Integral wire antenna (factory installed)

Astron AXQ9PRLMMCX –1/4 wave flexible whip

Astron AXH900 RP SMAR – 1/2 wave flexible whip, SMA

Serial Port Scanning

The Scan Function is provided to assist the user when they are unsure which

communication port the MDR210A-485 is attached to or what baud rate it has been set

to. The Scan Function will attempt to communicate with the MDR210A-485 over every

port installed on the PC at every allowed baud rate. While this is not a fast process, it

does allow the recovery of a device whose configuration is unknown. If the Scan

Function is unable to determine the port which the MDR210A-485 is attached to, the user

will be notified. The user should then ensure that no other application has the

communication port in use before re-attempting the Scan.

Application Fields

COM Port -Specifies which PC communication port the MDR210A-485 to be

configured is attached.

Scan -The scan function iterates each available PC communication port looking for an

attached MDR210A-485. If an MDR210A-485 is found, its COM Port and current Baud

Rate values are provided.

Network ID -All communicating MDR210A-485s must be programmed to the same

Network ID. The valid values are from hexadecimal 1 to FFF.

Hop Table -All communicating MDR210A-485s must be programmed to the same Hop

Table. The valid values are 0 to 6. Independent networks in the same vicinity should use

different Hop Tables to minimize packet collisions.

Baud Rate -This is the desired communication Baud Rate between the host and the

MDR210A-485.

Setup -Send the currently selected values to the MDR210A-485 attached to the specified

communication port.

Close -Exits the Application.

Networks

There are seven available networks (Hop Tables). Each network utilizes a different

pseudo-random hopping sequence to navigate through the shared hopping channels. In

the event that two modules from different networks collide on a channel (because they

hop in a different sequence) the two modules will jump to separate channels on the next

hop. Using networks, multiple module pairs can operate in the same vicinity with

minimal interference from each other. The network parameter is user-definable using the

MDR210A-485 Set-up Hop Table.

Module Address

Module Addresses provide another level of addressing among the MDR210A-485

modules. Each module in a network can be configured with a 16-bit Module Address to

establish selective communications within a network. This address is set to 65535 values

using the MDR210A-485 Set-up Hop Table command.

All modules with the same Module Address can transmit and receive data among

themselves. Any modules on a network with different Module Addresses will still detect

and listen to the data in order to maintain network synchronization. However, they will

not send the data to their serial ports if their Module Addresses do not match the Module

Addresses of the transmitter.

Data Validity

The first data packet transmitted contains all bytes that accumulated in the data buffer

while the header (see Figure 2a below) was being sent. After the first data packet is sent,

another header will be sent if data is available in the buffer. The header is followed by

another data packet. The second data packet (and all subsequent data packets) will

consist of data that accumulated in the buffer while the previous data packet and header

were being sent (see Figure 2a). The size of each data packet can vary up to 64 bytes.

This progression can be seen in Figure 2b.

Sent Data:

Group Data into Packets:

Header

Data

Packet 1

Header

Data

Packet 2

Header

Collect

Data for

Packet 1

Collect Data for Packet 2

Collect Date for Packet 3

Figure 2a –Generation of Data Packets

Data Validity (Cont.)

To verify data integrity, a 16-bit cyclic redundancy check (CRC) is computed for the

transmitted data and attached to the end of each data packet before transmission. The

receiver will then compute the CRC on all incoming data. Any received data that has an

invalid CRC is discarded.

Glossary

Data Buffer – Collects incoming serial data prior to over-the-air data transmission. The

data buffer can hold up to 132 bytes at a given time.

Header

Data

CRC

No Data To Idle Mode

Data from Buffer

Figure 2b

–

Transmit Mode Description

Data Packets – A grouping of data to be sent over-the-air. Each data packet contains a

header and data that is collected from the data buffer. The size of the packets varies up to

64 bytes depending on how many bytes of data are in the data buffer.

Glossary (cont.)

Frequency Hopping Spread Spectrum (FHSS) – Method employed by the MDR210A-

485 module which involves transmitting data over several different channels in a specific

channel hopping sequence known by the transmitter and the receiver(s).

Half-duplex – A mode for radio operations. Radios that operate in half-duplex are able

to either transmit data or receive data at a given time, but cannot do both simultaneously.

When one module is transmitting, all modules within range listen to the transmission and

will only transmit when the transmission is complete.

Module Addresses – Provides a layer of addressing among modules. Modules with the

same Module Addresses can communicate together.

Networks – Provides a layer above Module Addresses for communicating between

modules. Each network has a unique hopping sequence that allows modules on the same

network to remain synchronized together.

RS-232 logic – Standard logic levels implemented in devices using the RS-232

communication protocol.

Sensitivity –A measurement specification that describes how weak a signal can be

(in dBm) and still be detected by the receiver.

Serial Data – Data that enters the MDR210A-485 module through its serial port.

Start bit – A low UART signal to signify the beginning of an eight-bit data sequence.

Stop bit – The last bit in a UART data sequence. The stop bit is high and indicates the

end of an eight-bit data sequence.

Synchronization – Synchronization is used to ensure that the transmitter and receiver are

communicating properly with each other and following the same channel hopping

sequence.

Transmission Latency – Time required to send a packet of data. This value is

dependent on the number of bytes being sent and the baud rate of the module.

Transmit Mode – Mode of operation in which over-the-air data can be transmitted from

a module to other modules.

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