Siemens SIMATIC S7-300 Series Input Relay Module 16 Inputs, 20.4 → 28.8 V dc, 125 x 40 x 120 mm

  • RS Stock No. 453-2517
  • Mfr. Part No. 6ES7321-1BH02-0AA0
  • Manufacturer Siemens
Technical data sheets
Legislation and Compliance
RoHS Status: Not Applicable
COO (Country of Origin): DE
Product Details

Digital Input Expansion Module

Suitable for switches and 2/3/4 wire BERO’s (proximity switches)

Siemens Digital Expansion Module

The Siemens digital expansion module with 16 input channels is a highly efficient device used with S7-300 PLCs. It has many advanced features such as galvanic isolation between channels, backplane bus, and diagnostic indicators. These features make it an ideal expansion module for various industrial applications.

Features and Benefits

• Input supply rating of 24VDC
• Ambient operating temperature ranges between -20°C and 60°C
• 16 integrated digital inputs


• Industrial automation
• Robotics
• Automobiles industry


• ANSI/ESD S20.20:2014
• BSEN 61340-5-1:2007

Siemens S7-300 Digital and Analogue I/O Modules

Expansion modules and accessories to support the Siemens S7-300 PLC range. Each S7-313 PLC CPU Base Unit may be expanded with up to 8 expansion modules. S7-314 CPU Base Units can accept a total of 4 expansion racks consisting of 8 expansion modules each.,All expansion modules share the following features:

Compact design
LED’s input signal status indication
Front panel connector for actuators or sensors. Connectors can be coded according to application, thus preventing the connection of an incorrect unit
No slot rules: the address of the input corresponds to the slot number
Modules may be configured and the parameters set using STEP 7 Lite software
Data is stored centrally. When a module is removed/replaced data is automatically sent to the new module, removing possible set up errors

Attribute Value
Manufacturer Series SIMATIC S7-300 Series
Number of Inputs 16
Input Type Digital
For Use With SIMATIC S7-300 Series
Number of I/O 16
Voltage Category 20.4 → 28.8 V dc
Length 125mm
Width 40mm
Depth 120mm
Dimensions 125 x 40 x 120 mm
Maximum Operating Temperature +60°C
Minimum Operating Temperature -25°C
10 In stock for delivery within 3 working days
Price Each
SGD 338.67
(exc. GST)
SGD 362.38
(inc. GST)
Per unit
1 +
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