Siemens SIMATIC User Manual

Digital modules
3.1 Module overview
S7-300 Module data
50 Manual, 06/2017, A5E00105505-AJ
Table 3- 2 Digital input modules (continued)
Properties
Module
SM 321;
DI 16 x DC24V
High Speed
SM 321;
DI 16 x DC24V
with process and
diagnostic inter-
rupts
SM 321; DI 16 x
DC 24V/125V
with process and
diagnostic inter-
rupts
SM 321;
DI 16 x DC24V;
source input
SM 321;
DI 16 x UC24/48V
(-1BH10-)
(-7BH01-)
(-7EH00-)
(-1BH50-)
(-1CH00-)
Number of inputs 16 DI; electrical-
ly isolated in
groups of 16
16 DI; electrically
isolated in groups
of 16
16 DI; isolated in
groups of 16
16 DI,
source input, electri-
cally isolated in
groups of 16
16 DI; isolated in
groups of 1
Rated input voltage 24 VDC 24 VDC 24 VDC - 125
VDC
24 VDC 24 VDC to 48 VDC
24 VAC to 48 VAC
Suitable for... Switches;
2-wire, 3-wire and 4-wire proximity switches (BEROs)
Supports isochro-
nous mode
Yes Yes No No No
Programmable
diagnostics
No Yes Yes No No
Diagnostic interrupt
No
Yes
Yes
No
No
Edge-triggered
hardware interrupt
No Yes Yes No No
Adjustable input
delays
No Yes Yes No No
Special features Fast module;
especially for
isochronous
mode
2 short-circuit-
proof sensor sup-
plies for 8 chan-
nels each;
External redun-
dant sensor sup-
ply is supported
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Siemens SIMATIC Specifications

General

Product type designation	SIMATIC
CPU	Varies by model
Memory	Varies by model
Input/Output	Varies by model
Communication	Varies by model
Programming Language	STEP 7
Operating Temperature	0°C to 60°C (varies by model)
Protection Class	IP20
Category	Programmable Logic Controller (PLC)