57C413B RELIANCE ELECTRIC

Reliance Electric 57C413B 64K Memory Module

Reliance Electric 64K Memory Module

• 64 K Memory

• Required for Multiple Processor Applications

• Arbitrates Processors' Access to Bus

Reliance 57C413A / 57C413B Common Memory Module is required in slot 0 of a DCS 5000/AutoMax rack that contains more than one Processor module. The Common Memory Module stores the configuration data that must be shared among Processors, such as definitions of physical I/O. This frees Processor Module memory for application tasks. The Common Memory Module also arbitrates the Processors' access to the bus.

The Common memory Module may also be placed in slot 0 of a single-Processor rack. As in the case above, the configuration data which normally resides on the Processor module in a single-Processor rack is stored on the Common memory Module. When the Common Memory Module is placed in any even slot other than 0, it is used for user-definable data storage only. This mode is useful if you need to control explicitly the physical allocation of memory, e.g., to define consecutive registers for shaft register instructions. Note, however, that it is not possible to define arrays in this mode.