Up to 62 modules with 248 standard PNP inputs and 248 SPST relay
outputs can now be on a single network. Special sealed relays allow
these modules to hold Class I Div 2 Groups A, B, C, D hazardous
location approvals. Input power is switchable from internal mode where
all inputs are powered from AS-Interface, to external mode where all
inputs are powered externally.
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