Siemens SIMATIC S7-400 Configuration And Use Manual page 60

Technological Functions of the S7-400
Expansion Module EXM 438-1
The EXM 438-1 I/O expansion module provides the following additional inputs and
outputs as well as interfaces for incremental and absolute value encoders:
• 16 digital inputs, 24 V
• 8 digital outputs, 24 V
• 5 analog inputs
• 4 analog outputs 12 bit
• 4 analog outputs 16 bit
• 8 interfaces for incremental encoders
• 4 interfaces for absolute value encoders, SSI or EnDat
Expansion Module EXM 448
The communication expansion module EXM 448 has the following interfaces:
• Profibus DP, master or slave
• RS 232
You can optionally use MASTERDRIVES plug-in modules, e.g. SLB for SIMOLINK
and SBM2 for higher-resolution multi-turn encoders.
Expansion Module EXM 448-2
The communication expansion module EXM 448-2 has the following interfaces:
• SIMOLINK with master function for controlling up to 200 MASTERDRIVES
• SIMOLINK with slave function for fast coupling to SIMADYN D or multiple FM
458-1 DP
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Automation System S7-400 Configuration and Use
A5E00442711-02