Modicon X80 Extended Racks

Overview

You may extend the number of racks in order to:

increase the number of modules,
extend the area covered by the rack so that I/O modules can be installed closer to the different machines they are controlling.

NOTE: Only the X bus is extended across extended racks connected in a daisy chain. Modules that requires connection to the Ethernet bus do not operate when installed in extended racks.

You can use any of the Modicon X80 racks as an extended rack. For X80 racks with Ethernet backplane (BMEXBP••00 and BMEXBP••02) the Ethernet connections of the module slots are disabled.

M580 Local Rack Extension

NOTE: Extension of the M580 local rack in hot-standby configuration is not allowed.

The number of extended racks allowed in the M580 local rack depends on the CPU that you select:

CPU	Maximum number of X80 extended racks
BMEP581020	3
BMEP582020
BMEP582040
BMEP583020	7
BMEP583040
BMEP584020
BMEP584040
BMEP585040
BMEP586040

In a M580 multi-rack configuration, the racks (main local rack and extended racks) are connected each other in a daisy chain using X bus extension cables, connected to the BMXXBE1000 rack expansion modules.

NOTE: In the daisy chain of X80 racks, the maximum cumulative length of X bus cables is 30 m (98,42 ft).

In addition to the Modicon X80 extended racks, M580 local rack supports also Premium extended racks TSXRKY••EC. For more detailed information on M580 architectures with mixed X80 and Premium racks, refer to chapter Using Premium Racks in an M580 System.

X80 Drop Extension

Only one X80 extended rack can be added to an Ethernet RIO drop. The maximum length of the X bus cable in an Ethernet RIO drop is 30 m (98,42 ft).

NOTE: You cannot install Premium I/O modules in an Ethernet RIO drop.

For more information on extended racks in M580 RIO drops, refer to the Modicon M580, RIO Modules, Installation and Configuration Guide.

M340 Local Rack Extension

The number of extended racks allowed in the M340 station (local rack) depends on the CPU that you select:

Station		Maximum number of X80 extended racks
Processor	OS Version	Maximum number of X80 extended racks
BMXP341000	01.00	1
BMXP341000	>= 02.00	2
BMXP342000	>= 02.00	4
BMXP342010	01.00	1
BMXP342010	>= 02.00	4
BMXP3420102	01.00	1
BMXP3420102	>= 02.00	4
BMXP342020	01.00	1
BMXP342020	>= 02.00	4
BMXP342030	01.00	1
BMXP342030	>= 02.00	4
BMXP3420302	01.00	1
BMXP3420302	>= 02.00	4
BMXPRA0100	–	3

In a M340 multi-rack configuration, the racks (main local rack and extended racks) are connected each other in a daisy chain using X bus extension cables, connected to the BMXXBE1000 rack expansion modules.

NOTE: In the daisy chain, the maximum cumulative length of X bus cables is 30 m (98,42 ft).

Example of Topology

This is an example of a main local rack with one extended local rack:

NOTE:

Each rack has a power supply and a BMXXBE1000 extender module.
An extender cable (in this case a BMXXBC•••K cable) connects the two extender modules.
The unused ports on the two extender modules are terminated, with a TSXTLYEX line terminators.