Expansion unit configuration rules for RIO/HSL

Learn about the configuration rules for RIO/HSL.

When you set up the expansion unit, observe the configuration rules as shown in the following table.

Table 1. RIO/HSL configuration rules for expansion units
Feature	Maximum number of ports	Maximum number of loops	Maximum number of expansion units per loop	Maximum number of supported expansion units
9111-520 or 9111-285	2	1	4	4
9405-520 or 9406-520	2	1	6	6
9113-550	4	2	4	8
p5 550Q, or 720	4	2	6	12
9406-550	4	2	6	12
9117-570	16	8	4 (7 with a 9411-100 attachment¹)	14 (20 with a 9411-100 attachment)
9406-570	16	8	6	48
9118-575	2 per node	1 per node	1	1
9119-590	24	12	1 (7 with a 9411-100 attachment²)	8 (14 with a 9411-100 attachment)
9119-595	48	24	1 (7 with a 9411-100 attachment²)	12 (18 with a 9411-100 attachment)
9406-595	62	31	6	96
Notes: A model 9117-570 with a 9411-100 attachment cannot be mixed on the same loop as a 7040-61D, 7311-D10, 7311-D11, or 7311-D20 expansion unit. A model 9119-590 or 9119-595 with a 9411-100 attachment cannot be mixed on the same loop as a 5791, 5794, or 7040-61D expansion unit.