Siemens SIMATIC Box PC 820, Manual

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4-2
Box PC 820 / PC FI45 V2, Manual
A5E00051531-03
4.1 General Information
As a plug-in board, the direct key module is designed to be implemented in the
SIMATIC industrial PCs.
The module allows you to assign digital events to individual keys on the membrane
keyboard. Thus the direct control of a PLC’s digital input becomes possible by
pressing a key. As the module is configured as slave on the PROFIBUS, data can
be transferred via a standard field bus.
The direct key module enriches the SIMATIC Industrial PCs with the following
functions:
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The PROFIBUS scans up to 32 keys on the SIMATIC PC’s membrane
keyboard as direct keys.
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An external panel with up to 16 additional keys can be connected, if necessary.
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16 digital outputs to trigger check-back indicators of connected panels (PLC via
PROFIBUS DP) are provided.
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The PLC scans all direct keys via the PROFIBUS DP.
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The PROFIBUS DP port has been developed for transmission rates of 9.6 Kbps
– 12 Mbps.
Direct Key Module (Optional with FI45)
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