Analog Devices 3B Signal Conditioning Backplanes

To address diverse applications, the 3B Subsystem Series includes a family of backplanes which provide a complete signal conditioning solution. The three backplane models, 3B01, 3B02 and 3B03 are designed for 16, 8 and 4 channels respectively, to offer users the flexibility to match the size of a system to specific applications. All backplanes are provided with #6-32 x 1-inch screws and standoffs for mounting. Several mounting options are available, including rack, surface and NEMA enclosure.

Order Now Model 3B01 Backplane

All 3B Series modules feature a universal pin out and can be easily tailored to fit the user's application. Each backplane can accommodate any 3B Series module in a "Mix and Match" arrangement. Modules are "Hot Swappable"; power does not have to be removed when inserting or removing any module on the backplane. All backplanes provide a four screw terminal for each individual channel's input field connections. These connections satisfy all transducer inputs and provide transducer excitation when necessary. A cold junction temperature sensor is also supplied on each channel to accommodate thermocouple input modules. Each channel has two screw terminals for the output connections for the 4-20 mA output signal. Two 26-pin system connectors provide high level voltage I/O for all channels.

Figure 1 illustrates the 3B Series backplane functional block diagram. In addition, complete specifications are shown in the table.

Figure 1. Functional Block Diagram of Models 3B01, 3B02, and 3B03 Backplanes

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Features

Mix and Match 3B Series I/O Module Capability

Factory Mutual (FM) Approved

CE Certified

±1500 V peak Channel/Channel and Input/Output Isolation

Three Backplane Options: 4 -, 8 -, 16 - Channel

-25°C to +85°C Temperature Range

LEDs Indicate When Power is Applied

Replaceable AC Line Fuse in Protective Housing

Versatile Mounting Options

Surface Mount - stand alone or using Surface Mount Kits; Models AC1331, AC1332, AC1333

19-inch Rack Mount Kit - Model AC1330

Order Now Model 3B02 Backplane

Order Now Model 3B03 Backplane

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3B Series Backplane Specifications

Description	3B01	3B02	3B03
Channels	16	8	4
Isolation
Input-to-Output, Continuous	1500 V rms, maximum	*	*
Channel-to-Channel, Continuous	1500 V rms, maximum	*	*
Mechanical Dimensions-with modules	17.4" x 5.2" x 4.373" (441.96 mm x 132.08 mm x 111.07 mm)	11.0" x 5.2" x 4.373" (279.4 mm x 132.08 mm x 111.07 mm)	7.8" x 5.2" x 4.373" (198.12 mm x 132.08 mm x 111.07 mm)
Mounting Standoffs	7	5	4
Cold Junction Temperature Sensors
Number provided on backplane	16	8	4
Initial Accuracy @ +25°C	±0.5°C	*	*
Accuracy, +5°C to +45°C	±0.5°C (±0.0125°C/°C)	*	*
System I/O Connector
Number	2, 26-pin	*	*
Type	Amp 746290-6	*	*
Power Supply Options
Voltage: AC Power Supply¹	115 V AC	*	*
Voltage: DC Power Supply²	+24 V DC	*	*
Voltage: External Supplies³	±15 V DC and +24 V DC	*	*
Fuse: AC Power Supply	220 V AC @ 500 mA	*	*
Power Indicator	LEDs indicate ±15 V DC and +24 V DC Power Applied	*	*
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 model 3B01.
¹ Optional AC/DC Power Supplies, Models AC1300, AC1301 and AC1307, are described in power supply section.
² Optional DC/DC Converter, Model AC1302, is described in the power supply section.
³ External power may be connected to the P3 DC Power Connector. +24 V DC is only needed when current output is used.
Specifications subject to change without notice.

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