B 5231 / H51q-MS (0605)
98
The max. current must be 18 A (all I/O modules and the modules in the central rack), if 3 x
F 7126 are used to keep the system in operation even one power supply module F 7126 has
failed.
Values of the current requirement (+5 VDC) refer to the data sheets.
2 Modules
2.1 Central module F 8650X
The central module for safety related applications with TÃœV certificate of the PES H51q-MS
contains the essential functions demonstrated in the block diagram of the central module:
Figure 2: Block diagram of the central module F 8650X
– two clock-synchronized microprocessors
– each microprocessor with an own memory, one processor operates with real data and pro-
gram and the other one with inverted data and program
– testable hardware comparer for all the external accesses of both
microprocessors, in case of a fault the watchdog will be set to the safe status and the sta-
tus of the processor is announced
– Flash-EPROMs of the program memory for the operating system and the user program
usable for min. 100,000 writing cycles
– Data memory in sRAM
– Multiplexer to connect I/O bus, DPR and redundant CU (not used in the H51q-MS system)
– Battery backup of the sRAMs via batteries with monitoring
– 2 interfaces RS 485 with galvanic isolation. Transm. rate: max. 57600 bps
– 4digit diagnostic display and 2 LEDs for information out of the system, I/O level and user
program
Note Operating system/resource type in ELOP II
The assembly kit is usable since operating system BS41q/51q V7.0-8.
Resource type in ELOP II: H51qe-MS.
Watchdog
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