Modicon M580 Plc Page 2-7 I/O architectures

2/7 Processors: page 1/20 Ruggedized Modicon M580 modules: page 4/2 Presentation (continued) Modicon M580 automation platform Local I/O architecture Presentation Local I/O architecture is used for control systems that reside in the main control cabinet. The M580 platform provides interrupt services for this type of application. Up to 94 slots are possible for I/O modules in a configuration comprising a main rack and 7 expansion racks, connected by BMXXBE p 00 p rack expansion modules. Description The Modicon M580 automation platform provides local I/O management for control systems that are wired to the main control cabinet. Local I/O architecture can comprise a maximum of 10 I/O modules in the main rack, in addition to the CPU module 2 and the power supply module 1 . These local I/O can be extended on an expansion rack by using a BMXXBE p 00 p rack expansion module 3 . Ethernet slots are available only in the main rack because rack expansion cables only support X-bus. The choice of appropriate rack depends on the required number of modules for the system. Main racks are available in the following formats: 4, 8, and 12 slots. As well as discrete and analog I/O modules, the following modules are available: b Application-specific modules: v SSI encoder v Counter v Pulse train output v Weighing Some application-specific modules (weighing, etc.) require use of an Ethernet backplane. If necessary, communication and network modules can be installed in the local rack. The majority of communication and network modules need to be in the local rack. Local I/O architecture configuration rules When configuring an local I/O architecture system, the following 4 parameters should be considered: b Number of slots available in the 8 local racks (main and expansion racks) b Slots available for optional modules b Power consumed by the installed modules b Addressing words available for configuring the modules Available slots and power consumption The local I/O architecture can have a maximum of 94 available slots (with eight 12-slot racks) for I/O modules, application-specific modules, and communication modules. These modules are powered from the power supply included in the rack. For a valid configuration, simply add together the consumption (in mA) of the modules in the rack and check that the total current is less than that provided by the selected power supply. This power consumption calculation can easily be performed using Unity Pro software. Empty BMXXEM010 modules are also available to occupy unused slots. Module addressing (1) With Unity Pro, the I/O addressing is unlimited (physical limitation: 94 slots). (1) Requires Unity Pro software V8.0. Local I/O architecture: devices on local I/O Expansion rack Main rack X-bus For rack accessory references, see page 1/29 3 Main rack Expansion rack 10 slots max. available 12 slots max. available 2 1 2 1 3 4 5 6 7 8 9 10 2 1 3 4 5 6 7 8 9 10

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