6B SERIES CONFIGURATION GUIDE




Introduction

AN0040 The 6B Series Signal Conditioning modules and digital I/O boards implement flexible, distributed monitoring and control. By selecting only the modules and interfaces needed and connecting them via RS-485 communication, the data acquisition and control environment can be designed to both locate the I/O optimally as well as minimize sensor runs.

6B Series modules are available for millivolt and voltage, process current, RTD, and thermocouple input signals with a variety of standard ranges. Digital signals can be monitored and controlled by a 24-channel digital I/O board. A current output module completes the family. Each 6B module and digital I/O board is configurable through software. All modules and boards are powered by a single +5 V DC power supply and provide true channel-to-channel and input-to-output isolation.

Users can design their own backplane or use one of several available from Analog Devices. Each 6B Series backplane has a CJC temperature sensor on every channel to provide cold junction compensation for thermocouple modules. This feature enhances flexibility during system configuration, since any module can be used in any socket location on the backplane.



Configuring the Modules

For users designing their own backplane, the only configuring required is to select the 6B Series modules and/or digital I/O boards appropriate to the application.

For users of Analog Devices' designed backplanes, configuring modules is accomplished by selecting one or more of the following parts:

6B Series Modules and Digital I/O Boards

6B Backplane

Power Supply

Host Interface Cable and Cables to Interconnect Backplanes

Applications Software (Optional)

Accessories are also available to facilitate configuring 6B Series modules.

The following subsections describe how to select the parts of a 6B Series subsystem.

Selecting Modules and Digital I/O Boards

The 6B Series provides both analog input and output modules as well as digital I/O boards. All modules are isolated.

Select the types and number of 6B Series modules according to the sensor types used. Table 1 summarizes the 6B Series modules and digital I/O boards available. For more information on a particular 6B Series Module, select from the list below.

Model Description Isolation Communications
6B11 Thermocouple, mV, Volt, Current Inputs 1500 V rms RS-485
6B11HV Thermocouple, mV, Volt, Current Inputs 2500 V rms RS-485
6B12 mV, Volt, Current Inputs 1500 V rms RS-485
6B12HV mV, Volt, Current Inputs 2500 V rms RS-485
6B13 RTD Inputs: Platinum, Nickel, Copper 1500 V rms RS-485
6B13HV RTD Inputs: Platinum, Nickel, Copper 2500 V rms RS-485
6B21 Isolated Current Output 1500 V rms RS-485
6B50-1 24-Channel Digital I/O N/A RS-485
6B50-2 24-Channel Digital I/O N/A RS-232C/RS-485

Table 1: 6B Series Modules and Digital I/O Boards

Selecting Backplanes

Analog Devices provides eight analog module backplanes: two 1-channel, four 4-channel, and two 16-channel versions. Each backplane type offers a selection of communications interface and isolation level. If the host interface is RS-232C, then one backplane must have the RS-232C option for connecting to the host. All subsequent daisy-chained backplanes must have the RS-485, half-duplex interface. Each channel of the backplane contains a CJC temperature sensor for thermocouple measurements. 6B Series input and output modules can be installed in any socket on the backplane. Screw terminal blocks are provided for easy power connections, field wiring and RS-485 communications interface between backplanes. To interface to computer serial ports, backplanes provide DB-25 connectors. Additionally, 4-channel and 16-channel backplanes can be mounted in a 19-inch rack.

Select the type and number of backplanes according to the total number of input and output modules used in your application. Table 2 summarizes the ordering information for the 6B Series backplanes. For more information on the 6B Series Backplanes, go to the backplanes section.

Model Description Isolation Communications
6BP01-1 1-Channel 2500 V rms RS-485 Port
6BP01-2 1-Channel 1500 V rms RS-232C to Host PC; RS-485 to Next Backplane
6BP04-1 4-Channel 1500 V rms Two RS-485 Ports
6BP04-2 4-Channel 1500 V rms RS-232C to Host PC; RS-485 to Next Backplane
6BP04HV-1 4-Channel 2500 V rms Two RS-485 Ports
6BP04HV-2 4-Channel 2500 V rms RS-232C to Host PC; RS-485 to Next Backplane
6BP16-1 16-Channel 1500 V rms Two RS-485 Ports
6BP16-2 16-Channel 1500 V rms RS-232C to Host PC; RS-485 to Next Backplane

Table 2: 6B Series Backplanes

Selecting a Power Supply

All 6B Series modules and backplanes are powered by a single regulated +5 V DC power supply.

To determine the appropriate power supply for your application, add the current requirements for all the modules and the backplanes. Table 3 lists the power requirements for the 6B Series modules, digital I/O boards and backplanes. Table 4 lists the power supplies available from Analog Devices. For more information on the 3B Series Power Supplies, go to the power supplies section.

Model Power
6B11/6B11HV 100 mA
6B12/6B12HV 100 mA
6B13/6B13HV 100 mA
6B21 250 mA
6B50 70 mA
6BP01-1 Passive
6BP01-2 60 mA
6BP04-1 and 6BP04-2 60 mA
6BP04HV-1 and 6BP04HV-2 60 mA
6BP16-1 and 6BP16-2 60 mA

Table 3: 6B Series Modules, Boards and Backplanes

Model Input Output
955 115 V rms +5 V @ 1 amp
977 115 V rms +5 V @ 5 amp
PWR-01 115/240 V rms +5 V @ 5 amp

Table 4: Modular Chassis-Mount Power Supplies

Selecting an Interface Cable

Analog Devices markets two communications cables to interface 6B Series backplanes to host computers. Select the type of host interface cable according to the host PC serial port connector.

The Model AC1382 10-foot cable includes a DB-25 female host computer serial port connector and a male DB-25 male connector. This cable converts the 6B Series RS-232C backplane connector to a 25-pin host serial port connector.

The Model AC1385 10-foot cable comes with a DB-9 female host computer serial port connector and a male DB-25 connector. This cable converts the 6B Series RS-232C backplane connector to a 9-pin host serial port connector.

For RS-485 communications between backplanes, Belden cable (Part Number 9842) is recommended.

The Model CAB-03 3-foot flat ribbon cable connects the 6B50 digital I/O 50-pin connector to DB-16 or DB-24 solid state relay subsystem boards.

Table 5 summarizes the ordering information for the 6B Series interface cables. For more information on Interface Cables, go to the Interface Cables section on the Accessories page.

Model Description
AC1382 10-foot, Female DB-25 (to Host) and Male DB-25
(to 6B Series, -2 type, backplanes)
AC1385 10-foot, Female DB-9 (to Host) and Male DB-25
(to 6B Series, -2 type, backplanes)
CAB-03 3-foot, 50-pin flat ribbon cable

Table 5: 6B Series Backplane Interface Cables

Selecting Accessories

Analog Devices also provides accessories to help you configure your 6B system as well as interface to digital I/O solid state relays.

A rack-mount kit, Model AC1380, is available to fit a 6B Series backplane in a 19-inch rack. A 50 Ω current conversion resistor, Model AC1381, is available for current loop measurements, using either Model 6B11, 6B11HV, 6B12 or 6B12HV.

The Model STB-50A DIN rail mounted panel provides screw terminal connection to all 24 TTL-level descrete I/O channels of Model 6B50. The CAB-03 cable is included with the STB-50A.

The Model DB-16 provides, connects and isolates high level AC or DC voltage inputs or outputs to 16 digital I/O channels of Model 6B50. Model DB-16 accommodates 16 single-channel solid state relays.

The Model DB-24 provides, connects and isolates high-level AC or DC voltage inputs or outputs to 24 digital I/O channels of Model 6B50. Model DB-24 accommodates six 4-channel solid state relays.

Table 6 summarizes the ordering information for the 6B Series accessories. For more information on a particular accessory, go to the Accessories page.

Model Description
AC1380 19-inch Rack-Mount Kit for Backplanes
AC1381 50 Ω Current Conversion Resistor
STB-50A DIN Rail Mount Screw Termination Panel
DB-16 16-Channel Digital I/O Backplane
DB-24 24-Channel Digital I/O Backplane
AC1383 6B Series User's Manual

Table 6: 6B Series Accessories



Software

A DOS-based Sixbccd program and a Windows-based 6B-Win program are provided with the AC1383 User's Manual. Either program configures, calibrates, reads data from, or writes data to 6B Series modules and 6B50 digital I/O boards without writing application programs. Application software programs are also available with 6B Series drivers. Examples of some of the programs available directly from several software vendors are shown in Table 7. Download here.

Vendor Programs With 6B Series Drivers
National Instruments
6504 Bridge Point Parkway
Austin, TX 78730
Phone: 512-794-0100
FAX: 512-794-8411
www.natinst.com
LabVIEW
LabWindows
LabWindows/CVI
BridgeVIEW
TA Engineering Co., Inc.
1150 Moraga Way
Moraga, CA 94556
Phone: 510-376-8500
FAX: 510-376-4977
www.ta-eng.com
AIMAX for Windows
Labtech
400 Research Drive
Wilmington, MA 01887
Phone: 978-657-5400
FAX: 978-658-9972
www.labtech.com
Notebook
Notebook Pro
Control
Control Pro
Iconics, Inc.
100 Foxboro Road
Foxborough MA 02035
Phone: 508-543-8600
FAX: 508-543-1503
www.iconics.com
Genesis 32
KEPware, Inc.
25 Bridge Street
Yarmouth, ME 04096
Phone: 207-846-5581 or
1-888-KEPWARE
FAX: 207-8467-5947
www.kepware.com
DDE-AD6B
(Dynamic Data Exchange)

Table 7: Applications Software Programs Available with 6B Series Drivers



Documentation

The 6B Series User's Manual, Model AC1383, is available to help guide users through setting up a 6B Series system. The 6B Series configuration software is also provided with this manual.



System Configuration Example

A typical 6B Series System application might consist of five J-type thermocouple sensor inputs, four 0-20 mA inputs, three platinum RTD sensor inputs, five digital inputs, 4 digital outputs and a current output. This requirement could be satisfied with the units listed in Table 8. Note that the 6B11 module can be software configured for thermocouple or mV input signals. The 6B50-2 board can be software configured for both digital inputs and digital outputs. Also shown are the solid state relays that are selected to match the AC or DC high level inputs/outputs and mounted on the DB-16 backplane. (Refer to accessory section for listing.)

Quantity Model Description/Comments
9 6B11 Software Configurable; Thermocouple, mV and mA Inputs
3 6B13 Software Configurable; RTD Inputs
1 6B21 Software Configurable; mA output
1 6BP16-2 16-Channel Backplane; RS-232C to host
4 AC1381 Current Conversion Resistor
5 IA140A Single-Channel AC Input Solid State Relay
4 OD060 Single-Channel DC Output Solid State Relay
1 AC1380 19-inch Rack-Mount Kit
1 6B50-1 Software Configurable; Digital I/O Board
1 DB-16 16-Channel Digital Backplane
1 AC1385 Cable; 6BP16-2 to Host PC
1 CAB-03 Cable; 6B50 I/O to DB-16
1 AC1383 User Manual with Configuration Software
2 977 AC/DC Power Supply with +5 V @ 5 amp output
1 AC1340-D AC Power Cord

Table 8: Example of a 6B Series System

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