Digital modules
3.1 Module overview
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
3-3
Table 3-2 Digital input modules: Overview of properties (continued)
Module
Properties
SM 321;
DI 16 x
24/48VUC
(-1CH00-)
SM 321;
DI 16 x
48-125 VDC
(-1CH20-)
SM 321;
DI 16 x
120/230 VAC
(-1FH00-)
SM 321;
DI 16 x
NAMUR
(-7TH00-) *
SM 321;
DI 8 x
120/230 VAC
(-1FF01-)
SM 321;
DI 8 x
120/230 VAC
ISOL
(-1FF10-)
Number of inputs 16 DI;
electrically
isolated in
groups of 1
16 DI;
electrically
isolated in
groups of 8
16 DI;
electrically
isolated in
groups of 4
16 DI;
electrically
isolated in
groups of 2
8 DI; electrically
isolated in
groups of 2
8 DI;
electrically
isolated in
groups of 1
Rated input voltage 24 VDC to 48
VDC, 24 VAC
to 48 VAC
48 VDC to
125 VDC
120/230 VAC 120/230 VAC 120/230 VAC 120/230 VAC
Suitable for... Switches;
2-wire, 3-wire and 4-wire
proximity switches (BEROs)
Switches;
2-wire / 3-wire
AC proximity
switches
NAMUR
encoder
Switches;
2-wire / 3-wire AC proximity
switches
Supports
isochronous mode
No No No No No No
Programmable
diagnostics
function
No No No Yes No No
Diagnostic interrupt No No No Yes No No
Edge-triggered
hardware interrupt
No No No No No No
Adjustable input
delays
No No No No No No
Special features - - - - -
* A description of this module can be found in Manual ET 200M signal modules for process
automation. You will find this manual online at:
http://support.automation.siemens.com/WW/view/de/7215812.
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