K623 Discrete IO Expansion

The KNC-PLC-K623 Discrete Input and Output Expansion Modules are offered in Transistor or Relay outputs and sinking or sourcing inputs. These units come with 4 inputs and 4 outputs or 8 inputs and 8 outputs. These units are ideal to expand beyond the onboard inputs and outputs of the KNC-PLC-K6 CPUs, which can handle up to 264 I/O points with a maximum of 14 expansion modules. The inputs are rated for 3.5 mA and can be configured for either sourcing or sinking. The transistor outputs are rated for 500 mA @ 24 VDC and come only in a sourcing configuration. The relay outputs are rated for 2 A @ 30 VDC or 250 VAC, and are great for switching on and off high load devices AC or DC devices, particularly AC or DC motors. The transistor output modules are opto-isolated for unit protection.




  • 4 Inputs and 4 Outputs or 8 Inputs and 8 Outputs
  • Inputs Can be Configured to Sink or Source
  • Transistor or Relay Outputs
  • Inputs are Opto-Isolated
  • Transistor Outputs are Opto-Isolated
  • LED Display to Monitor Running Conditions
  • Easy Maintenance and Installation

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K623-08DR Expansion Module,
Discrete I/O
4 4 Sinking or Sourcing Relay Click here for PDF Spec Sheet Click here to request a Quote. $59.00 view here
Quantity Discounts
1pc. $59.00
10pc. $56.29
25pc. $53.73
50pc. $52.15
100pc. $50.34
Contact Us for Quantities over 100
Add to Cart
K623-08DT Expansion Module,
Discrete I/O
4 4 Sinking or Sourcing Transistor Click here for PDF Spec Sheet Click here to request a Quote. $59.00 view here
Quantity Discounts
1pc. $59.00
10pc. $55.68
25pc. $53.15
50pc. $51.59
100pc. $49.98
Contact Us for Quantities over 100
Add to Cart
K623-16DR Expansion Module,
Discrete I/O
8 8 Sinking or Sourcing Relay Click here for PDF Spec Sheet Click here to request a Quote. $77.00 view here
Quantity Discounts
1pc. $77.00
10pc. $72.92
25pc. $69.60
50pc. $67.55
100pc. $65.32
Contact Us for Quantities over 100
Add to Cart
K623-16DT Expansion Module,
Discrete I/O
8 8 Sinking or Sourcing Transistor Click here for PDF Spec Sheet Click here to request a Quote. $81.00 view here
Quantity Discounts
1pc. $81.00
10pc. $76.88
25pc. $73.39
50pc. $71.23
100pc. $68.98
Contact Us for Quantities over 100
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.

  • K623-08DR Wiring
  • K623-16DR Wiring
  • K623-08DT Wiring
  • K623-16DT Wiring
  • K623-08DR & K623-08DT Dimensions
  • K623-16DR & K623-16DT Dimensions