Siemens S7-300 SM321 PLC CPU Module For Connect The PLC To Digital Process Signals

Application

Digital input modules can be used to connect the PLC to digital process signals. They are suitable for connecting standard switches and two-wire proximity switches (BERO).

 

Design

Digital input modules feature the following mechanical characteristics:

• Compact design:
  The rugged plastic housing contains:
  • Green LEDs for indicating the signal status at the inputs.
  • Socket for the front connector, protected, behind the front door.
  • Labeling field on the front door.
  • Connector pin assignment for the wiring on the inside of the front door.
• Easy installation:
  There are no slot rules, the addresses of the inputs are determined by the slot.
  When used in ET 200M in combination with active bus modules, hot swapping is possible without any reaction.
• User-friendly wiring.

The modules are available with 8, 16, 32, or 64 channels.

 

Function

Digital input modules convert the level of the external digital signals from the process to the internal signal level (logical "0" or "1") of the controller.

Various input voltages support the connection of different process signals:

• 24 V DC
• 48 to 125 V DC
• 120/230 V AC

Apart from cost-effective, easy-to-handle modules, modules with special functions are also available:

• For use in isochronous mode
• Process and diagnostic alarms
• Use for current sourcing or current sinking

Special modules are also available for process engineering which, for example, support the NAMUR standard.

 

 

Technical specifications

Article number		6ES7321 -1BH02 -0AA0	6ES7321 -1BH50 -0AA0	6ES7321 -1BL00 -0AA0	6ES7321 -1BP00 -0AA0	6ES7321 -1BH10 -0AA0
		SM321, 16DI, DC24V	SM321, 16DI,DC24V, SOURCE INPUT	SM321, 32DI, DC24V	SM321, 64 DI, DC 24V, 3MS, SINK/SOURE	SM321,16DI,DC24V, 0.05MS INPUT DELAY.
Supply voltage
Load voltage L+
● Rated value (DC)		24 V	24 V	24 V	24 V	24 V
● permissible range, lower limit (DC)		20.4 V	20.4 V	20.4 V		20.4 V
● permissible range, upper limit (DC)		28.8 V	28.8 V	28.8 V		28.8 V
Input current
from backplane bus 5 V DC, max.		10 mA	10 mA	15 mA	100 mA	110 mA
Power loss
Power loss, typ.		3.5 W	3.5 W	6.5 W	7 W	3.8 W
Digital inputs
Number of digital inputs		16	16	32	64	16
Input characteristic curve in accordance with IEC 61131, type 1		Yes	Yes	Yes	Yes	Yes
Number of simultaneously controllable inputs
all mounting positions
— up to 40 °C, max.					64
— up to 60 °C, max.					32
horizontal installation
— up to 40 °C, max.		16	16	32	64	16
— up to 60 °C, max.		16	16	16	32	16
vertical installation
— up to 40 °C, max.		16	16	32	32	16
Input voltage
● Type of input voltage		DC	DC	DC	DC	DC
● Rated value (DC)		24 V	24 V	24 V	24 V	24 V
● for signal "0"		-30 to +5V	-5 to +30V	-30 to +5V	-30 to +5V	-30 to +5V
● for signal "1"		13 to 30V	-13 to -30V	13 to 30V	13 to 30V	13 to 30V
Input current
● for signal "1", typ.		7 mA	7 mA	7 mA	4.2 mA	7 mA

S7-300 SM 321 Series Digital Input Module Main Models:

6ES7 321-1BH02-0AA0    6ES7 321-1BH10-0AA0

6ES7 321-1BH50-0AA0    6ES7 321-1BL00-0AA0

6ES7 321-7BH01-0AB0    6ES7 321-1EL00-0AA0

6ES7 321-1FF01-0AA0    6ES7 321-1FF10-0AA0

6ES7 321-1FH00-0AA0    6ES7 321-1CH00-0AA0

6ES7 321-1CH20-0AA0

Products range(May get discount):
SIEMENS S7-400 PLC,SIEMENS S7-1200 PLC, SIEMENS S7-200 SIEMENS PLC, SIEMENS S7-300, SIEMENS S7-400, SIEMENS ET200, SIEMENS HMI, SIEMENS TOUCH PANEL, SIEMENS TDC, SIEMENS 6ES5, SIEMENS 6ES7, SIEMENS 6DD, SIEMENS controller, SIEMENS CNC , Etc
SIMATIC S7-200,SIMATIC S7-300,SIMATIC S7-400
SIEMENS LOGO ,SIEMENS PG,SIMATIC HMI, SIEMENS Wincc
SIEMENS ET200M,SIEMENS ET200S,SIEMENS Profibus
MicroMaster 420, MicroMaster 430, MicroMaster 440 ,SIEMENS VFD
,SIEMENS SINAMICS,,SIEMENS G110,SIEMENS G120, SIEMENS drive
SINUMERIK 810D,SINUMERIK 840D,SINUMERIK 840Di
SIMOTION D425,SIMOTION D435,SIMOTION D445
SIEMENS SIMOVERT, SIMOVERT MASTERDRIVES CONVERTER

 
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