Rockwell Automation AADvance Controller Solutions Handbook - Manual (Page 67)

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Document: 553631
(ICSTT-RM447J_EN_P) Issue: 09:
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Data Input and Output
A controller can support up to 48 I/O modules in total (on 16 I/O base units); as an
example, here is a controller with four 8 channel T9401 digital input modules and two
8 channel T9451 Digital Output Modules, giving 32 inputs and 16 outputs.