6B Series Backplanes

Introduction

The 6B Series backplanes, combined with modules and the 6B50 digital I/O boards, provide a complete data acquisition system. Each backplane incorporates screw terminals for field wiring inputs and outputs, as well as temperature sensors - Model AC1361 - for cold junction compensation (CJC) with thermocouple modules. The communications interface is RS-232C to host computer and bi-directional RS-485 between backplanes. Functional block diagrams of the 16-channel Model 6BP16 backplanes are shown in Figure 1 and Figure 2.

For flexibility in applications, one, four and sixteen channel backplanes are available. These can be ordered with the standard RS-485 interface (-1 type backplanes) or with the optional RS-232C to RS-485 converter (-2 type backplanes). The RS-232C interface allows easy hookup to most computer serial ports, while the bi-directional RS-485 interface can be used for daisy chaining additional backplanes. The RS-485 interface can drive a twisted pair cable up to a maximum of 4000 feet. Figure 3 illustrates a daisy-chain 6B Series Configuration, while Figure 4 illustrates a multidrop configuration.

All 6B Series backplanes require a +5V ±5% regulated power supply for the backplane circuitry as well as the modules. A backplane and power supply (Model 955, 977 or PWR-01) can be mounted on the Model AC1380 19-inch rack mount kit. Complete 6B Series backplane specifications are shown in the tables.


 6bp16-1_fbd-1
Figure 1. Functional Block Diagram Model 6BP16-1
 6bp16-2_fbd
Figure 2. Functional Block Diagram Model 6BP16-2
6b_daisy_chain

Figure 3. Daisy-Chain 6B Series .Configuration Example
6b_multidrop
 
Figure 4. Multi-Drop 6B Series Configuration Example


Features, Benefits and Models

Features

  • Mix and Match 6B Series I/O Module Capability
  • CE Certified - EMC Directive 89/336/EEC
  • Configuration Jumper (W1) on all Backplanes
  • 1500 V rms and 2500 V rms (HV) Channel/Channel and Input/Output Isolation
  • Three Backplane Options : 1-, 4-, 16-Channels
  • -25°C to +85°C Temperature Range

Benefits

  • Isolation Options - the 6B Series module family offers two isolation levels : 1500 V rms and 2500 V rms (HV). The 6BP01 and 6BP04HV support 2500 V rms input-output/channel-channel isolation. All other backplanes support 1500 V rms.
  • Configuration Jumper - The configuration jumper (W1) enables changes to the address, baud rate, and checksum of the 6B module installed in the leftmost position of the backplane. When the W1 jumper is installed on power-up, the module is forced into a known address (00H), baud rate (9600), and checksum status (disabled). It is then possible to address the module to verify and change its configuration.
  • Screw Termination Block - Each channel on a 6B Series backplane has a screw termination block with four screw terminals for connecting transducers. These screw terminals satisfy all transducer and process current outputs.
  • 50 Ω Current Conversion Resistor Socket - To use a 6B11 or 6B12 analog input module to measure process current inputs, a 50 ½ (0.1%) current conversion resistor - Model AC1381 - is inserted into pin sockets provided on each channel.
  • Shunt Diode - A shunt diode on each 6B Series backplane provides polarity reversal protection to the backplane.
  • Fuse - a fuse on each 6B Series backplane protects the backplane from damage caused by short circuits or by failure of one of the modules on the backplane.
  • Status Indicators - Two LEDs indicate the status of the communication lines.
  • Networking - Multiple backplanes and multiple 6B50 digital I/O boards can be connected in an RS-485 network. A system may be configured with a total of 256 channels - note each 6B module counts as one channel and, each 6B50 digital 24-channel I/O board counts as one channel.

Models

6bp01-1
6bp01-2
Model 6BP01-1
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Model 6BP01-2
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6bp04-1
 
6bp04-2
 
 Model 6BP04-1
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Model 6BP04-2
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6bp04hv-1
6bp04hv-2
Model 6BP04HV-1
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Model 6BP04HV-2
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 6bp16-1
 6bp16-2
 Model 6BP16-1
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 Model 6BP16-2
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Single-Channel Backplane Specifications

 Feature

Model 6BP01-1
 

Model 6BP01-2
 
Analog Input/Output Channels
 1  1
Interface
 Communications Input
 RS-485
 RS-232C
 Connector Type
 Screw Terminals
 Female DB-25
 Communication Output
 N/A
 RS-485
 Connector Type
 N/A
 Screw Terminals
 Cold Junction Temperature Sensor

Number provided on backplane
 
1  *
 Type
 AC1361
 *
 Initial Accuracy @ +25°C
 ±0.25°C (±0.75°C, maximum)
 *
 Accuracy, +5°C to +45°C
 ±0.5°C (±0.0125°C/°C)
 *
Configuration Jumper  Yes
 *
 Provisions For Mounting AC1381 Resistor
 Yes
 *
 Isolation
 Input-to-Output and Power Continuous
 2500 V rms, maximum
 *
 Transient
 ANSI/IEEE C37.90.1-1989
 *
 Power Supply
 Voltage: Operating
 Passive
 +5 V dc ±5%

Voltage: Max Safe Limit-with modules
 
 +6.5 V dc
 *
 Current
 N/A
 60 mA
 Fuse
 0.5 Ampere, slow-blow
Littelfuse 251.500
 
*
*
Mechanical Dimensions
 4.25" x 1.37"
(108 mm x 34.80 mm)

*
*
 Environmental
 Temperature Range
 Rated Performance
 -25°C to +85°C
 *
 Operating
 -25°C to +85°C
 *
 Storage
 -40°C to +85°C
 *
 Relative Humidity
 0 to 95% @ +60°C noncondensing
 *

Specifications same as 6BP01-1.
Specifications subject to change without notice.

Four-Channel Backplane Specifications

Feature  Model 6BP04-1  6BP04-2 
6BP04HV-1  6BP04HV-2 
Analog Input/Output Channels 4  *  *  *
Interface
 Communications Input RS-485  RS-232C  *
RS-232C
 Connector Type  Screw Terminals  DB-25  * DB-25
 Communication Output  RS-485  * * *
 Connector Type  Screw Terminals  * * *
 Cold Junction Temperature Sensor
 Number provided on backplane
 4
 * * *
 Type
 AC1361
 *
 *
 *
 Initial Accuracy @ +25°C
 ±0.25°C (±0.75°C, maximum)
 *
 *
 *
 Accuracy, +5°C to +45°C
 ±0.5°C (±0.0125°C/°C)
 *
 *
 *
 Configuration Jumper
 Yes
 *
 *
 *
 Provision For Mounting AC1381 Resistors
 Yes
 *
 *
 *
 Isolation
 Input-to-Output and Power Continuous
 1500 V rms, maximum
 *
2500 V rms,
maximum
 **
 Transient
 ANSI/IEEE C37.90.1-1989
 *
 *
 *
 Power Supply
 Voltage: Operating
 +5 V dc ±5%
 *
 *
 *
 Voltage: Max Safe Limit-with module
 +6.5 V dc
 *
 +35 V dc
 **
 Overvoltage Protection
 N/A
 N/A
 >6.5 V dc
 **
 Current
 60 mA
 *
 *
 *
 Fuse
5 Ampere, slow-blow
Littelfuse 251.500
*
*
*
*
*
*
 Mechanical Dimensions
 3.47" x 6.65"
(90.68 mm x 165 mm)
*
*
*
*
*
*
 Environmental
 Temperature Range
 Rated Performance
 -25°C to +85°C
 *
 *
 *
 Operating
 -25°C to +85°C
 *
 *
 *
 Storage
 -40°C to +85°C
 *
 *
 *
 Relative Humidity
 0 to 95% @ +60°C
noncondensing
 *
 *
 *

Sixteen-Channel Backplane Specifications

Feature   Model 6BP16-1
Model 6BP16-2
Analog Input/Output Channels  16  16
Interface
 Communications Input  RS-485  RS-232C
 Connector Type  Screw Terminals Female DB-25
 Communication Output  RS-485  RS-485
 Connector Type  Screw Terminals  Screw Terminals
Cold Junction Temperature Sensor
 
 Number provided on backplane
 16  *
 Type
 AC1361
 *
 Initial Accuracy @ +25°C
 ±0.25°C (±0.75°C, maximum)
 *
 Accuracy, +5°C to +45°C
 ±0.5°C (±0.0125°C/°C)
 *
 Configuration Jumper
 Yes
*

Provision For Mounting AC1381 Resistors
 Yes
 *
 Isolation
 Input-to-Output and Power Continuous
 1500 V rms, maximum
 *
 Transient
 ANSI/IEEE C37.90.1-1989
 *
 Power Supply
 Voltage: Operating
 +5 V dc ±5%
 *
 Voltage: Max Safe Limit-with modules
 +6.5 V dc
 *
 Current
 60 mA
 *
 Fuse
5 Ampere, slow-blow
Littelfuse 251.500
 *
Mechanical Dimensions  3.47" x 17.4"
(90.68 mm x 442 mm)
 *
 Environmental
 Temperature Range
 Rated Performance
 -25°C to +85°C
 *
 Operating
 -25°C to +85°C
 *
 Storage
 -40°C to +85°C
 *
 Relative Humidity
 0 to 95% @ +60°C noncondensing
 *

* Specifications same as 6BP16-1.
Specifications subject to change without notice.