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R70SR SNAP SIGNAL™ Serial Data Radio

June 23, 2023

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Serial Broadcast Mode

—Broadcast mode allows for more flexible radio layouts and is used in the star and MultiHop tree topologies. These 

topologies are much more flexible but they are slower. When using broadcast mode, a small percentage of data packets will not be reach 
their destination. Broadcast mode requires the application layer to automatically retry packets that time out. In networks with multiple server, 
the client radio must use broadcast mode, but the server radios can be set to use routing mode to route their data packets back to the client 

radio. In broadcast mode, the radios route serial data packets to all devices in the network. In general, this mode will have slower communi­
cation speeds but will allow for much more system flexibility. If the servers and repeaters are in broadcast mode, they route serial data pack­

ets to all other devices and listen to serial data packets coming from all devices. If the client radio is in broadcast mode, it routes serial data 

packets to all servers and repeaters and listens to serial data packets coming from all devices. 

Transmit Power Levels

—The 900 MHz radios transmit at 1 Watt (30 dBm) or 250 mW (24 dBm). The 250 mW mode reduces the radio's 

range, which can help avoid cross talk in areas with multiple systems. For 2.4 GHz models, this DIP switch is disabled. The transmit power 

for 2.4 GHz is fixed at about 65 mW EIRP (18 dBm). 

Network Topologies in Serial Mode

Cable Replacement Configuration for Point-to-Point Networks--In this simple cable replacement application, the radio system knows all data 
originating at one end must be transmitted to the other end. This allows the radio system to automatically correct for transmission problems 
and it also provides the greatest throughput. This is the fastest configuration.

Simple point-to-point network

Client radio

Server radio

Device Settings

DIP Switches

1

2

3

4

Client configuration route to a server

Off

Off 

Off

On

Server configuration route to the client

Off

Off

Off

Off

Cable Replacement with a Repeater

­­In this simple cable replacement application with a repeater, the radio system still knows all data origi­

nating at one end must be transmitted to the other end. In this application, there are no serial devices connected to the repeater(s). The sys­
tem still corrects for transmission problems, but it takes time to repeat the message. The network delay is double that of a system with no re­

peater.

Point-to-point network with repeater

Client radio

Server radio

Repeater radio

Device Settings

DIP Switches

1

2

3

4

Client configuration route to a server

Off

Off 

Off

On

Repeater configuration

Off

On

On

Off

Server configuration route to the client

Off

Off

Off

Off

Serial Broadcast Mode Configuration with a Star Network

--In this more complex star topology, the client radio at the center of the network 

can communicate to many server radios. A common example would be a PLC at the center communicating with many remote I/O systems. 
The star topology is slower than a point-to-point network, but faster than a tree network.

© Banner Engineering Corp.

Summary of Contents for Sure Cross R70SR Series

Page 1: ...multiple hops to extend the network s range R70SR Models Models Frequency Transmit Power R70SR9MQ 900 MHz ISM Band 1 Watt R70SR2MQ 2 4 GHz ISM Band 65 mW 100 mW EIRP Quick Start Guide Setting Up Your...

Page 2: ...orm a site survey analysis with the MultiHop Configuration Software offers improved perfor mance in larger Star and Tree network topologies and adds the ability to communicate with other Sure Cross Mu...

Page 3: ...ies in Serial Mode Cable Replacement Configuration for Point to Point Networks In this simple cable replacement application the radio system knows all data originating at one end must be transmitted t...

Page 4: ...works we recommend avoiding serial broadcast mode and switching the radios to MultiHop Data Radio mode Serial broadcast mode configuration with a tree network Client Server Server Repeater Server Devi...

Page 5: ...le cable replacement configuration for a point to point network Client radio Server radio Device Settings DIP Switches 1 2 3 4 Client configuration On Off Off On Server configuration On Off Off Off Ca...

Page 6: ...r configuration On Off Off Off Packet Routing in MultiHop Data Radio Mode In MultiHop Data Radio mode the client radio first discovers all connected Modbus server in the network then uses the Modbus I...

Page 7: ...tiHop networks may take a few minutes to synchro nize First all radios within range of the client data radio wirelessly synchronize to the client radio These radios may be server or repeater radios Af...

Page 8: ...ng up Process Steps Response LED 1 LED 2 1 Apply power to the client radio Solid amber 2 The client radio enters RUN mode Flashes green Data packets begin transmitting between the client and its child...

Page 9: ...upply Voltage 10 V DC to 30 V DC Outside the USA 12 V DC to 24 V DC 10 For European applications power this device from a Limited Power Source as defined in EN 60950 1 Average Current for 900 MHz Radi...

Page 10: ...x 1 2 3 4 1 5 1 Brown 2 White 3 Blue 4 Black 5 Not used MQDC 406 2 m 6 56 ft MQDC 410 3 m 9 8 ft MQDC 415 5 m 16 4 ft MQDC 430 9 m 29 5 ft MQDC 450 15 m 49 2 ft 4 Pin Threaded M12 Cordsets Single Ende...

Page 11: ...ale Right Angle Female Straight 1 73 14 5 0 57 M12 x 1 1 26 1 18 14 5 0 57 M12 x 1 MQDEC 406RS 1 83 m 6 ft MQDEC 412RS 3 66 m 12 ft MQDEC 420RS 6 10 m 20 ft MQDEC 430RS 9 14 m 30 2 ft MQDEC 450RS 15 2...

Page 12: ...energized off output condition IMPORTANT Please download the complete R70SR Snap Signal Serial Data Radio technical documentation available in multiple languages from www bannerengineering com for de...

Page 13: ...RSE OF DEALING OR TRADE USAGE This Warranty is exclusive and limited to repair or at the discretion of Banner Engineering Corp replacement IN NO EVENT SHALL BAN NER ENGINEERING CORP BE LIABLE TO BUYER...

Page 14: ...l Data Radio Part number 233275 Revision A Original Instructions Banner Engineering Corp All rights reserved 233275 L utilisateur de l appareil doit accepter tout brouillage radio lectrique subi m me...

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