What this AS-Interface module does
The Siemens 3RG9004-0SC00 is an AS-Interface user module that provides 4 digital inputs rated at 45 mA and 4 PNP outputs, with telephone jacks and a parameter pin for configuration.

Siemens 3RG9004-0SC00 AS-Interface user module, IP00, 4 inputs (45 mA) and 4 PNP outputs with telephone jacks and parameter pin.
The Siemens 3RG9004-0SC00 is an AS-Interface user module that provides 4 digital inputs rated at 45 mA and 4 PNP outputs, with telephone jacks and a parameter pin for configuration.
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The module uses telephone jacks for the AS-Interface connection and a parameter pin for configuration. Wiring details are in the product manual; the 4 inputs are 45 mA sink-type and the 4 outputs are PNP sourcing.
The evidence does not specify the differences between these two order codes. Compare the I/O configuration and AS-Interface profile in the respective datasheets.
Alternative models and sibling configurations in the same Siemens series. For obsolete or discontinued parts, these models can serve as compatible replacements or functional alternatives for plant maintenance.
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