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Cooper Bussmann BU-905U-L Wireless I/O Installation Manual

About This Document

This document is the BU-905U-L Wireless I/O Installation Manual that describes how to install your BU-905U-L units and contains important
information for installing your units with other equipment.

NOTE: If your network only contains one transmitter and receiver pair, you should also read the BU-905U-L QuickStart Guides.

This document contains the following sections:

Section

Read this section if you want to

Basic steps for using your unit

Learn the basic steps for installing and using your unit.

Factory default configuration

Understand how the transmitter sends information to the receiver.

Unit components

Understand the different parts of your unit.

Antenna installation

Learn how to install an antenna with your unit.

Resetting factory defaults

Reset your unit to the original factory default settings.

Linking transmitter and receiver units

Link your units to work as a dedicated pair.

Safety information

Understand important safety information related to your unit.
NOTE: You must read this information before installing your unit.

Specifications

Know technical information about your unit.

For more information, see the next sections.

NSTALLING

OUR

NIT

This section describes how to install your unit and contains the following sections:

Step

Description

For more information, see …

1, Read the safety information

Lets you understand important safety information related to your

Safety information on page 3.

unit. NOTE: You must read this information before installing your unit.

2. Get to know the unit features

Understand the basic features of your unit.

Unit components and
connections on page 5.

3. Install the antenna

Learn how to install an antenna with your unit.

Installing the antenna on page 9.

4. Install the power supply

Learn how to install a power supply for your unit.

Installing the power supply
on page 14.

5. Install the units

Learn how to install your unit.

Installing the unit on page 23.

6. Linking and configuring

Learn how to link and configure your units to transmit and

Configuring your units

the unit

receive information.

on page 24.

7. Test the unit

Understand the principles for testing your units.

Testing your units on page 25.

Note: To ensure internal surge protection works correctly, you must earth each unit using the Earth terminal.

For more information, see the next sections.

3A1580Rev1.7

Summary of Contents for BU-905U-L

Page 1: ...Cooper Bussmann BU 905U L Wireless I O Installation Manual Version 1 7 3A1580Rev1 7 Read and Retain for Future Reference ...

Page 2: ...ns 5 Transmitter unit 5 Receiver unit 7 Installing the antenna 9 Supported antennas 9 Radio transmission distances 10 Installing and earthing antennas 11 Omni directional antennas dipole and collinear 11 Dipole antennas 11 Collinear antennas 11 Yagi directional antennas 13 Installing the power supply 14 Inputs and outputs 15 Digital inputs 15 Relay outputs 17 Status outputs 18 Analog input 18 Ther...

Page 3: ...umber and any other certification designations NOTE Any changes or modifications not expressly approved by Cooper Bussmann P L could void the user s authority to operate this equipment To operate this equipment legally the user must obtain a radio operating license from the government agency This is done so the government can coordinate radio users in order to minimize interference Safety Informat...

Page 4: ...ead this information before installing your unit Specifications Know technical information about your unit For more information see the next sections INSTALLING YOUR UNIT This section describes how to install your unit and contains the following sections Step Description For more information see 1 Read the safety information Lets you understand important safety information related to your Safety i...

Page 5: ...reless I O Installation Manual Unit Components and Connections This section shows the components and terminal connections for the transmitter and receiver units Transmitter Unit The BU 905U L T transmitter unit has the following components and terminal connections 5 3A1580Rev1 7 ...

Page 6: ...ition detected in unit TX Led Flashes Transmitting Message PG LED on Configuration Cable Connected Input LED ON Input LEDS i e D1 D2 SP AZ light when the corresponding input is active D1 Digital Input 1 is active Low D2 Digital Input 2 is active SP Analog Setpoint is active AZ Analog Input is zero mA All LEDs medium flash Medium speed flash 1 6Hz indicates the module is halfway through the configu...

Page 7: ...ooperbussmann com BussmannWirelessResources Cooper Bussmann BU 905U L Wireless I O Installation Manual Receiver Unit Your BU 905U L R unit has the following components and terminal connections 7 3A1580Rev1 7 ...

Page 8: ...ON D3 Relay Output D3 is ON LEDs with RSSI Push When you press the RSSI push button the unit shows the signal strength by lighting the Button Pressed LEDs from the bottom to the top Signal strength is the strength of the last message received that was addressed to this station LED Signal Strength LED Signal Strength D1 More than 85 dBm RX More than 100 dBm D2 More than 90 dBm CF More than 105 dBm ...

Page 9: ...WH900 SMA Whip antenna for mounting directly onto the module 6 dBi operation up to mile 1 km BU CFD890EL 0 dBi Dipole antenna with 15 of Cellfoil cable and SMA connector 0 dBi SG900EL 5dBi Collinear omni directional antenna with N type connector 5 dBi BU SG900 6 8dBi Collinear omni directional antenna with N type connector 8 dBi BU YU6 900 10dBi Yagi directional antenna with N type connector 10 dB...

Page 10: ...stance you must elevate at least one site on a hill or transmission tower Modules will operate reliably with some radio path obstruction however obstructions also reduce the reliable distance Note You must test all obstructed paths to check the reliability of the path You can achieve maximum transmission distances if the radio path has line of sight For example raising antennas above intermediate ...

Page 11: ...wever as the length of coaxial cable increases so do cable losses For use on unlicensed frequency channels there are several types of antenna suitable for use If you mount antennas on elevated masts you should effectively earth the masts to avoid lightening surges The BU 905U L radios are fitted with surge protection Note For high lightening risk areas Cooper Bussmann recommends additional surge s...

Page 12: ...w cooperbussmann com BussmannWirelessResources Cooper Bussmann BU 905U L Wireless I O Installation Manual The following diagrams shows the recommended installation for omni directional antennas 3A1580Rev1 7 ...

Page 13: ...ave a drain hole on the folded element You should position the drain hole at the bottom when installing the antenna You can install Yagi antennas Vertically polarized with the elements in a vertical plane or Horizontally polarized with the elements in a horizontal plane The following table shows the recommended installation mode for different situations If your installation has Cooper Bussmann rec...

Page 14: ...50mA 24V 300mA 125mA The power supply can be a floating supply or negatively grounded The transmitter provides a 24Vdc regulated supply for analog loop power The supply is rated at 35mA and should ONLY be used for powering analog loops To install the power supply 1 Connect the positive lead to Power Supply Input 2 Connect the negative lead to Ground Note To ensure internal surge protection works c...

Page 15: ...to 35mA on page 14 Analog setpoint 1 Allows discrete setpoint to be controlled from Refer to the User Manual analog input Threshold adjustable via rotary switch Thermocouple 1 Provides measurement of E J K T type Thermocouple input millivolt input Thermocouple millivolt signals and user defined on page 20 thermocouple types Thermocouple 1 Lets you control discrete setpoint from Refer to the User M...

Page 16: ...iving relays Each digital input is connected between the appropriate Digital Input terminal and Ground Each digital input circuit includes a LED indicator that lights when the digital input is active i e when the input circuit is closed To activate the digital input the switching device resistance must be less than 200 ohms Connection Method Example Voltage free contact Active 0 5v signal device 3...

Page 17: ...individually configure digital outputs to turn off if no command message is received by the output for a certain period This feature provides an intelligent watchdog for each output so communications failure at a transmitting site causes the output to revert to a known state The output circuit is connected to the appropriate pair of Digital Output terminals Each digital output circuit includes a L...

Page 18: ... outputs Analog Input The BU 905U L T module provides one 0 20mA DC analog input for connecting to instrument transducers e g level moisture pressure transducers etc Note The BU 905U L T module inputs measure down to 0mA and can also be used for zero based signals e g 0 10mA The analog input has a positive and negative terminal and can be placed at any point in the current loop providing neither i...

Page 19: ... You should only connect one end of the cable shield to Earth To connect an analog signal from a PLC or DCS output to an analog input on the BU 905U L T you must carefully check the internal circuit of the output as different devices use different ways to create an analog signal The following diagrams illustrate different connection methods Analog Signal Source Example 2 Wire Transducer 4 Wire Tra...

Page 20: ...suitable for connection to a thermocouple or a millivolt level signal The module provides linearization tables for J K and T type thermocouples and also supports other types via a user linearization table Millivolt signals in the range 10mV to 100mV are supported For more information on configuring the thermocouple input and cold junction compensation to suit your application refer to the User Man...

Page 21: ...igital inputs as pulse inputs with the following characteristics Characteristic Value Maximum rate 10Hz Minimum OFF time 20mSec Minimum ON time 20mSec Note You should connect the pulse input in the same way as a digital input The following diagrams illustrate different connection methods Connection method Example Passive transistor Active pulse device 21 3A1580Rev1 7 ...

Page 22: ... g electronic indicator recorder PLC DCS input etc by connecting the output between the Analog Output terminal and the COM terminal Note Zener protection of analog outputs provides protection against short periods of over voltage however longer periods may result in module damage You can also individually configure analog outputs to turn off i e 0mA if no command message is received to the output ...

Page 23: ...he unit on page 23 Configuring your unit Describes the different ways to configure your unit Configuring your units on page 24 Testing your unit Describes the Bussmann recommendations for testing your unit Testing your units on page 25 For more information see the next sections Installing the Unit To install the unit 1 Connect signals to the supplied terminals 2 Connect the radio antenna 3 Install...

Page 24: ... the User Manual For more information on setting the factory default configuration refer to the Quick Start Guide included with your module The following table details the factory default configuration Signals Sent Over Radio BU 905U L T Transmitter Sends BU 905U L R Receiver Digital Input 1 Digital Output 1 Digital Input 2 Digital Output 2 Analog Setpoint Digital Output 3 Analog input 4 20mA Anal...

Page 25: ... an intermediate unit as a repeater Output LEDs flash quickly Red OK LED Power Supply voltage Supply should be between 9 and 30Vdc Analog loop supply current The analog loop supply is rated for 35mA max Module configuration Your module configuration may be invalid Re load or restore factory default configuration TX LED flashes but no RX LED Ensure the BU 905U L R is set to the same Register the re...

Page 26: ...se in Class I Div 2 hazardous locations the power supply must be approved for Class 1 Div 2 use WARNING Explosion hazard do not disconnect while circuit is live unless area is known to be non hazardous Transmitter 1 1 Watt Frequency Hopping Spread Spectrum FHSS Transmitter Frequency 902 928 MHz Actual frequency range depends on country Receiver Unit Input output Number Additional information Digit...

Page 27: ... port is an 8 pin RJ45 plug that communicates using standard RS232 signals Signal information Value Baud rate 9600 Bits 8 bits with 1 stop bit Parity No parity Cooper Bussmann supplies a green configuration cable wired to the following pin out Note The following pin out information is for reference only RJ45 Required Signal Name Normal Color DB9 1 Ring Indicator Green White 9 2 Data Carrier Detect...

Page 28: ...ion tables 20 loop powered device 22 maximum transmission distance 10 mechanical switches 15 millivolt signal 20 net gain 9 obstructions 10 intermediate 10 overvoltage 18 passive transistor 21 pin out 27 PLC 18 polarization 13 polarized 13 power supply 14 installing 14 problems 25 pulse input 21 PVC tape 11 Radio Frequency Interference 18 receiver components 7 front panel 8 LEDs 8 terminal connect...

Page 29: ...www cooperbussmann com BussmannWirelessResources Cooper Bussmann BU 905U L Wireless I O Installation Manual Notes 29 3A1580Rev1 7 ...

Page 30: ... assistance is available to all customers Staffed by degreed engineers this application support is available Monday Friday 8 00 a m 5 00 p m CT Contact s Phone 636 527 1270 s Fax 636 527 1607 s E mail fusetech cooperindustries com s Live Chat www cooperbussmann com Online Resources Visit www cooperbussmann com for the following resources s Product search cross reference s Product technical materia...

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