Siemens SIMATIC Manual page 51

Table 3- 3 Digital input modules (continued)
SM 321;
Properties
DI 16 x DC48-125V
(-1CH20-)
Number of inputs 16 DI; isolated in
groups of 4
Rated input voltage 120/230 VAC
Suitable for... Switches;
2-wire, 3-wire and
4-wire proximity
switches (BEROs)
Supports isochro- No
nous mode
Programmable No
diagnostics
Diagnostic interrupt No
Edge-triggered No
hardware interrupt
Adjustable input No
delays
Special features ---
* This module is described in the ET 200M Signal Modules for Process Automation manual.
You can find the manual on the Internet
(http://support.automation.siemens.com/WW/view/en/7215812).
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
SM 321; SM 321;
DI 16 x AC120/230 DI 16 x NAMUR
V
(-1FH00-) (-7TH00-) *
16 DI; isolated in 16 DI; isolated in
groups of 4 groups of 2
120/230 VAC 24 VDC
Switches; 2-wire / NAMUR encoder
3-wire AC proximi-
ty switches
No No
No No
No Yes
No No
No No
--- Module with single
channel diagnos-
tics and extensive
control functions
Module
SM 321; DI 8 x
AC 120/230V
(-1FF01-)
8 DI; isolated in
groups of 2
120/230 VAC
Switches; 2-wire / 3-wire AC proximity
switches
No
No
No
No
No
---
Digital modules
3.1 Module overview
SM 321; DI 8 x AC
120/230 V ISOL
(-1FF10-)
8 DI; isolated in
groups of 2
120/230 VAC
No
No
No
No
No
---
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