Siemens SIMATIC User Manual

Digital modules
3.11 Digital input module SM 321; DI 16 x 24 VDC; with hardware and diagnostic interrupts (6ES7321-7BH01-
0AB0)
S7-300 Module data
84 Manual, 06/2017, A5E00105505-AJ
Technical specifications
Status, interrupts, diagnostics
Status display
• Inputs
green LED per channel
• Sensor supplies (Vs)
green LED per output
Interrupts
• Hardware interrupt
• Diagnostic interrupt
programmable
programmable
Diagnostic functions
programmable
• Group error display
red LED (SF)
• Reading diagnostic information
supported
Monitoring for
• wirebreak
yes, sensing I < 1 mA
Sensor supply outputs
Number of outputs 2
Output voltage
• on load
min. L+ (- 2.5 V)
Output current
• Rated value
• Permitted range
120 mA
0 mA to 150 mA
Additional (redundant) supply
supported
Short-circuit protection
yes, electronic
Encoder selection data
Input voltage
• Rated value
• "1" signal
• "0" signal
24 V DC
13 V to 30 V
-30 V to + 5 V
Input current
• "1" signal
typ. 7 mA
Input characteristics
to IEC 61131, type 2
Connection of 2-wire BEROs
• Permissible quiescent current
supported
max. 2 mA
Wiring of the signal transmitters
using a 20-pin front connector
Shunt circuit of the sensor for wire-break detection
10 kohms to 18 kohms

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)