Copyright 2005 by Siemens AG
A5E00409892-01
Product Information on the Reference Manual
Programmable Logic Controllers S7-300 Module Data Release 3
1 Position Decoder Module SM 338; POS-INPUT;
(6ES7338-4BC01-0AB0)
Order number
6ES7338-4BC01-0AB0
Characteristics
The position decoder module SM 338; POS-INPUT is distinguished by the
following features:
• 3 inputs for the connection of maximum three absolute value encoders (SSI)
and 2 digital inputs to freeze the encoder values
• Direct reaction possible to encoder values in moving systems
• Processing of acquired encoder values of the SM 338 in user program
• Supports clocked operation
• Type of encoder value acquisition (see chapter 1.1.2.1) can be selected:
– Free running
– Clocked
• 24 VDC rated input voltage
• Non-isolated against the CPU
• Fast mode selectable; with faster encoder recording and compressed
checkback interface
Fast mode is available as of SM 338; POS-INPUT firmware version V2.0.0 and
as of STEP 7 V5.3+SP2 selectable.
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