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Bus systems

The MAC Serial Input Manifold (SIM) is a slave device within the Profibus or Device Net Network.
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Description
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Theory of Operation 

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MAC Valve Serial Input Manifold Units have pre-wired solenoid connections. 

It is only necessary to make the communication and power connections to the Serial Interface terminals and to set

DIP switches in the SIM Unit at the time of installation. 

The MAC SIM system comes with a standard five pin Mini type communications cable and with many optional power connectors.  Thus, the amount of wiring by way of the connectors is minimal

 Profibus20

 Bus20

 The MAC Serial Input Manifold (SIM) is a slave device within the Profibus  network. 

Thus, it will respond to all of the commands associated with the network like any other node of its type. 

The PLC programmer will not have to make any special allowances with the Serial Input Manifold.
Since the MAC SIM Unit is nothing more than a node on the Profibus network, it can also be used in conjunction with our Outputs Only Serial Interface (SLIM) product or any other Profibus compatible system.
Each SIM Unit (as shown in Figure 3) occupies a single node in the network. 
The output portion of the consumes 4 bytes (32 bits) so that the system can control up to 24 MAC solenoid valves plus 8 additional user defined outputs.
These user outputs can control remote valve stacks or any other output within the current and voltage specification of the output modules. 
There can be up to two output modules with 4 outputs per module.   The location and addressing of these words will be discuss later in this document.

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