Serial interfaces may be provided both on an AS and on an OS. Simple laboratory apparatus, such as dosing pumps and balances are usually connected directly to an AS so that they may be easily integrated into control loops. Laboratory apparatus with more complex functions, such as analysers or titration devices should be connected directly to an OS.

The slide-in module provides four 9-pin serial interfaces.

The devices connected to a serial interface can communicate in various ways with the automation unit:

Standard drivers for "known" laboratory apparatus
NAMUR drivers for "unknown" laboratory apparatus
The channels are potential separated (insulation voltage 35 V).

• Independent SIO channels with FIFO storage, supports RTS/CTS hardware handshake.
• Parallel processing of all channels, resulting in a reduction in delay
• Max. transfer rate of 38,400 Baud (per channel)

Parameter Name	Parameter Value
Bus	RS-485
Other characteristics	industrial