What is the maximum number of BMXERT1604T module supported on Local rack of M580 Standalone CPU.

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In a Modicon M580 local drop, the maximum number of BMX ERT 1604T modules depends on the local drop CPU type and the maximum number of Expert channel supported. A BMX ERT 1604T module is counted as 4 expert channels.
Maximum 25 BMXERT1604T module can be configured on M580 Local rack on EIO Network depending on the type of CPU .

For Example:

BMEP581020 = Expert channel supported = 36 /4 = 9 ERT module.
BMEP582020 = Expert channel supported = 72/4 = 18 ERT module.
BMEP582040 = Expert channel supported = 72/4 = 18 ERT module.
BMEP583020 = Expert channel supported = 108/4 = 27 expert modules = Max 25 ERT module + rest other expert modules like counting , Motion module.
BMEP583040 = Expert channel supported = 108/4 = 27 expert modules = Max 25 ERT module + rest other expert modules like counting , Motion module.
BMEP584020 = Expert channel supported = 144/4 = 36 expert modules = Max 25 ERT module + rest other expert modules like counting , Motion module.
BMEP584040 = Expert channel supported = 144/4 = 36 expert modules = Max 25 ERT module + rest other expert modules like counting , Motion module.
BMEP585040= Expert channel supported = 180/4 = 45 expert modules = Max 25 ERT module + rest other expert modules like counting , Motion module.
BMEP586040 = Expert channel supported = 216/4 = 25 expert modules = Max 25 ERT module + rest other expert modules like counting , Motion module.

Refer the attached document for maximum Expert Channel supported with M580 CPU.