Siemens SIMATIC User Manual

Digital modules
3.15 Digital input module SM 321; DI 16 x DC 48-125 V; (6ES7321-1CH20-0AA0)
S7-300 Module data
Manual, 06/2017, A5E00105505-AJ
109
SM 321; DI 16 x DC 48-125 V - Technical specifications
Technical specifications
Dimensions and weight
Dimensions W x H x D (mm) 40 x 125 x 120
Weight
ca. 200 g
Module-specific data
Supports isochronous mode
no
Number of inputs
16
Cable length
• unshielded
• shielded
max. 600 m
max. 1000 m
Voltages, currents, electrical potentials
Number of simultaneously controlled inputs per group at U
I
to 60 V
to 146 V
• horizontal mounting position
to 50 °C
to 60 °C
8
8
8
6
• vertical mounting position
to 40 °C
8 8
Electrical isolation
• between channels and the backplane bus
yes
• between channels
in groups of
yes
8
Maximum potential difference
• between different circuits
146 VDC / 132 VAC
Isolation test voltage
1500 VDC
Current consumption
• from the backplane bus
max. 40 mA
Power loss of the module
typ. 4.3 W
Status, interrupts, diagnostics
Status display
green LED per channel
Interrupts
none
Diagnostic functions
none

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)