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.
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
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(Obsolete), 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.
