Backplanes

BB21x: Backplanes for LB2 IO Modules

BB21A: Backplane for starting a new I/O rack

This backplane is used for starting a new set of I/O modules (when an additional power supply is not required). It has a connector for the LB2 cable so you can connect it to the previous set of modules on the DIN rail.

BB21B: Backplane for I/O in the middle positions

This backplane is used in the middle of a set of connected modules. It can also be used at the end of a set (allows future expansion of I/O set).

BB21C: Backplane for I/O at the end position

This backplane is used at the end of a set of connected modules. It has a connector for the LB2 cable so you can connect it to the next set of I/O modules (or power supply – if required).

BB41x: Backplanes for LB2 Power Supply Modules

BB41A: Backplane for starting expansion I/O with a P/S

This backplane is used for starting a new set of modules on a new DIN rail. It has a connector for the LB2 cable so you can connect it to the set of modules on the previous DIN rail. Note: this backplane is not used for the first set of I/O modules and cannot be connected to the CPU module.

BB41B: Backplane for the P/S in the middle position

This backplane is used in the middle of a set of connected modules. It can also be used at the end of a set. This backplane can also used for a redundant power supply module.

BB41E: Backplane for an extra Power Supply Module

This backplane is used when the IO modules need more power than what the previous power supply is supplying (in a large rack of I/O modules). This backplane isolates power from the previous modules ie. a new source of power to modules on its right side.

BB61x: Backplanes for LB2 CPU Modules

BB61A: Backplanes for the CPU start position

This backplane is used when you do not have any communication modules (SP04A, IM51A, …) that need to be connected to the left of the CPU module. If there are communication modules, then use the BB61B instead.

BB61B: Backplane for the CPU middle position

This backplane is used in the middle of a set of connected modules. It can also be used at the start position.

BB61R: Backplane for Redundant CPU Module

This backplane is used to connect a redundant CPU module to the adjacent main CPU module. Note: only used when you have the redundant CPU modules side by side.

BB81x: Backplanes for LB2 Communication Modules

BB81A: Backplane for Comms modules in the start position

This backplane is used at the start position. No modules can be connected to the left side of this module.

BB81B: Backplane for Comms modules in the middle

This backplane is used in the middle postion. It can also be used at the start position.

Introduction to LB2 I/O Series

The Brodersen LB2 I/O modules are designed for the RTU32M & RTU32N series. The I/O modules are in two parts, a bottom part containing the backplane bus, and a top part containing the I/O board and logic. All LB2 modules are hot swappable and equipped with a 200 MHz processor to process I/O, handle filtering, SOE, debounce, module clock and general module logic. Diagnostic variables are available for all LB2 I/O modules. Please see the module datasheets for full info.

Module firmware update is handled at the RTU level from the Brodersen WorkSuite.

Use only genuine Brodersen bus cables for connection to Brodersen RTUs and for extension of I/O module blocks. The connection cables for the LB2 backplane bus are designed to meet the power requirements and shielding to run high speed communications. The maximum overall length of a complete system is 40 meters. Each LB2 I/O module & power supply module is calculated as 2 cm. The cables are as the length indicates, e.g. UCC-610/1 count as 100 cm.

The maximum system configuration is 60 I/O modules on one LB2 Bus. If the configuration exceeds 60 I/O modules, an additional CPU is required.