K521 Discrete IO Expansion

The PLC-K521 series of Discrete Input Expansion Modules are offered with either 8 or 16 inputs. These modules are attached to the PLC-K5 CPUs to expand beyond the onboard inputs. The PLC-K5 CPU series can handle up to 136 I/O points with a maximum of 6 expansion modules. If a user were to select the PLC-K508-40AT, equipped with 40 I/O points, and an additional 6 PLC-K521-16DX units, the user would achieve the maximum 136 I/O points within the constraint of 6 expansion modules. The PLC-K521-__DX modules come with the option to either sink or source the inputs; each input is rated for 3.5mA. All modules are opto-isolated so units are not damaged.




  • 8 or 16 Sinking or Sourcing Inputs
  • Rated for 3.5mA @ 24VDC
  • Inputs are Opto-Isolated
  • LED Display to Monitor Running Conditions
  • Easy Maintenance and Installation

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K521-08DX Discrete
Inputs
8 N/A Sinking or
Sourcing
N/A Click here for PDF Spec Sheet Click here to request a Quote. $51.00 view here
Quantity Discounts
1pc. $51.00
10pc. $48.80
25pc. $47.38
50pc. $44.29
100pc. $41.20
Contact Us for Quantities over 100
10 in Stock Add to Cart
K521-16DX Discrete
Inputs
16 N/A Sinking or
Sourcing
N/A Click here for PDF Spec Sheet Click here to request a Quote. $64.00 view here
Quantity Discounts
1pc. $64.00
10pc. $61.99
25pc. $60.19
50pc. $54.65
100pc. $50.87
Contact Us for Quantities over 100
14 in Stock Add to Cart

IMPORTANT NOTE: When stock status reads "contact us," the lead time could range from 6 to 16 weeks, model dependent. Please contact the factory for more details.

  • 08DX Dimensions
  • 08DX Wiring Diagram
  • 16DX Dimensions
  • 16DX Wiring Diagram