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NOTE: The KNC-PLC-K521 Series PLC Expansion Modules have been discontinued and are now LTSOH (Limited to Stock on Hand). The KNC-PLC-K621 series offers replacements for KNC-PLC-K521 units.
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.
Item | Input Points | Input Type | Rated Input Voltage | Rated Input Current | Price (USD) Set Ascending Direction | Add to Cart |
---|---|---|---|---|---|---|
KNC-PLC-K521-16DX | 16 | Sinking or Sourcing | Max 24VDC | 3.5 mA | $74.00 | |
KNC-PLC-K521-08DX | 8 | Sinking or Sourcing | Max 24VDC | 3.5 mA | $57.00 |