Rockwell Automation MBB BUS Extender Module - Manual (Page 6)

6 MBB October 2005 – Issue 4
Triguard SC300E
EXTENSION CHASSIS ADDRESSING
The chassis address is set up on links on the chassis backplane. The physical locations of the
links are indicated by small triangles in columns ‘b’ and ‘c’ of areas ‘d’ in Figure 2-3. On the
chassis backplane the links are identified as UNIT ID0 to UNIT ID3. The presence of a link sets
the corresponding address bit to ‘0’. If a link is absent the corresponding address bit is a ‘1’.
The full range of chassis address link settings is given in Figure 2-5.
POWER SUPPLIES
A pair of auctioneering diodes combines the two 5.4Vdc power supplies from the chassis-
mounted PSUs into a single 5Vdc (nominal) supply for the whole module. The 12V outputs
from the chassis-mounted PSUs are not used by the MBB.
A ‘power on clear’ pulse resets the control logic when the power supply first comes on line.