Digital modules
3.1 Module overview
S7-300 Automation System Module data
3-6 Manual, 08/2006, A5E00105505-04
Overview of properties
The table below shows the essential properties of digital IO modules
Table 3-6 Digital IO modules
Module
Properties
SM 323; DI 16/DO 16 x
DC 24 V/ 0.5 A
(-1BL00-)
SM 323; DI 8/DO 8 x
DC 24 V/0.5 A
(-1BH01-)
SM 327; DI 8/DX 8 x
DC 24 V/0.5 A,
programmable
(-1BH00-)
Number of inputs 16 inputs, electrically
isolated in groups of 16
8 inputs, electrically isolated
in groups of 8
8 digital inputs, plus 8
separately programmable
inputs/outputs, electrically
isolated in groups of 16
Number of outputs 16 outputs, electrically
isolated in groups of 8
8 outputs, electrically
isolated in groups of 8
Rated input voltage 24 VDC 24 VDC 24 VDC
Output current 0.5 A 0.5 A 0.5 A
Rated load voltage 24 VDC 24 VDC 24 VDC
Inputs suitable for... Switches and 2-/3-/4-wire proximity switches (BEROs).
Outputs suitable for... solenoid valves, DC contactors and signal lamps
Supports isochronous mode No No No
Programmable diagnostics No No No
Diagnostic interrupt No No No
Edge-triggered hardware
interrupt
No No No
Adjustable input delay times No No No
Substitution value output No No No
Special features -
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