Tppr Backplane; Ring Network - Honeywell touchpoint pro Operating Manual

3.3.11 TPPR Backplane

The TPPR Backplane is the power and information highway to which all of the TPPR modules are attached. There can be
several backplanes in larger units, and they are installed within the DIN rail to which the modules are clipped.
The Backplane is available in four lengths (270 mm, 350 mm, 430 mm, 480 mm) to suit 5, 7, 9 or 10 I/O modules
respectively, but the choice may be restricted by the size of the selected power supply option and the need to maintain
adequate cooling space between modules.
Note: The DIN rail is 430 mm for a standard enclosure or 487 mm for the wide enclosure (10 x I/O) option.
The Power Supply Unit (PSU) plugs into the green socket on the left hand side of the Backplane PCB, and it supplies power
to the modules via the white connectors. The Ring Coupling Module (RCM) normally sits next to the Power Connector and
handles all of the bi-directional communication between the CCB and the modules, again via the white connectors.

3.3.12 Ring Network

The Ring Coupling Module (RCM) and Input / Output (I/O) modules connect to a dual ring circuit so that they can
communicate with the CCB through each other and through the RCM.
This enables fail-safe redundancy because, if one addressable module fails and interrupts the primary circuit, the
addressable modules on either side of it can still communicate with the CCB via the backup ring circuit (see diagram below),
and the CCB can identify which module has failed by knowing which addressable modules are still active.
Pt. No. 2400M2566_1_EN
INTRODUCTION
RCM
24 V DC
RCM Redundancy
PSU Input
Module (option)
Figure 21.
TPPR Controller
PSU RCM Input Modules
Redundancy
Circuits
Gas Detectors
Figure 22. TPPR Controller Typical Schematic
Sensor
Input Modules Field Device
Output Modules
TPPR Backplane
Output Modules
TPPR- Activated Field Devices
17
Backplane
DIN Rail
Ring 'A'
Ring 'B'
Touchpoint Pro
Operating Manual