GE GFK-0787B user manual Single Sensor to Three Blocks Triple Bus

8

Single Sensor to Three Blocks (Triple Bus)

PLC A PLC B PLC C

P C G G G S P B B B U C C C

A B C

P C G G G S P B B B U C C C

A B C

P C G G G S P B B B U C C C

A B C

6.2V Zener Diodes for Line Monitoring (optional)

DC+
I1
	Input 1
I15/32	Input 15 or 32
O16
DC+
I1
I15/32
O16
DC+
I1
I15/32
O16

H 6.2 volt Zener diodes are used for optional line monitoring on circuits configured as tristate inputs. This option is only available with 16-circuit DC blocks.

H All blocks in an input group must have the same number of circuits (either 16 or 32).

H On either 16-circuit or 32-circuit blocks, circuit 16 is used as an output if the block group is configured for input autotesting.

H On any block, circuits that are not configured as part of the GMR input group can be used as non-redundant inputs or outputs.

H If redundant power supplies are used on the blocks, they should be diode ªORedº power supplies providing a common power source for all blocks in the group. Different groups may use different power sources.

H All blocks in the input group must be assigned the same serial bus address.

H If the block group is configured for input autotesting, it must be wired appropriately, Each input that is configured (by the GMR Configuration Software) to be autotested must have its input device wired to receive power from output Q16 of the block group, as shown above. The Q16 outputs from each block are ªdiode±ORedº together to function as the power feed for autotested input devices. Input devices for input circuits that are not configured for autotesting should not be wired to the power feed output.

H Isolation diodes must also be wired as shown above for any input to be autotested.

	The suggested diode is 1N5400 or equivalent.
8-4	GeniustModular Redundancy Flexible Triple Modular Redundant (TMR) System	GFK-0787B
	User's Manual ± March 1995