C25 - Smooth Stepper Terminal Board

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C25 - Smooth Stepper Terminal Board


This card provides an easy way of interfacing your inputs and outputs from you parallel port. It provides terminals for the connections and conditions the signals for use in CNC applications

This board serves as a basic breakout board for the Smooth Stepper Board.


  • 34 Inputs and Outputs on 2 ports.

  • Full access to all the pins of the Smooth Stepper Board.

  • Connects directly to the Smooth Stepper (from Warp9). The board is provided with sockets that allow the Smooth Stepper Board to be plugged directly into this board.  No ribbon cables required.  When using the Smooth Stepper board there is no need to use an additional power supply to power the board. It will draw power from the Smooth Stepper board.

  • Built-in Passive Low Pass Filters for the all inputs. This board includes low pass filters to reduce the effect of the noise from the drivers or other devices over the inputs signals.

  • All TTL 5VDC signals.  Interface directly with parallel port interface products and other CNC4PC cards. 5VDC (TTL) cards are very common among automation devices.

  • Input and output pins with close by ground connections. Forget about grounding problems. Easily connect your pin by using your close by ground connection. No need to be an electronics expert to ground all your stuff.

  • Screw-On connections for all terminals. You only have to screw-on the wires to make all your connections.

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   Frequently Asked Questions and Answers

  • Joe Smolenski - 4 years ago
    I have the C25 BOB coupled with the Ethernet Smooth Stepper. Can you use the 0-5v output to control speed of VFD thru Mach4 or do I need a speed control board also?

    You may want to consider adding a C41S to your setup: https://www.cnc4pc.com/c41s-pwm-variable-speed-control-board.html You can use this wiring diagram: http://cnc4pc.com/Tech_Docs/JINAN2ESS.pdf Wiring to the C41S may be a little messy.  It may have b...
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  • PaulRygaard - 3 years ago
    I have an ESS with the C25S BOB and 4 Wantai DQ542 drivers. Can one of the outputs on Port 1 Drive the 4 enable pins on my drivers? * I notice your sample hookups do not hook up the enable pins * I don't see specs on the C25S output pins.

    You can…  You can assign and wire any available output for this.  But here are some thoughts on this: On stepper drivers it is usually not all that beneficial to use the enable, as they usually have auto low power when not moving, so you just can leave...
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  • Michael Brocato - 2 years ago
    I have a huanyang vfd , a c25, and a ess smoothstepper is there a wiring diagram for this

    You can use this wiring diagram: https://www.cnc4pc.com/pub/media/productattachments/files/jinan2ess_1.pdf It would be ideal to consider using a breakout board with the spindle control circuit built-in, like the C25XP, C82, C11G.  As you would bene...
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  • Benoit Myrand - 2 years ago
    can this board support torch height control ? i seen that ESS and MACH4 supports it, i would like to use that function.

    Note this is a basic breakout board and you can assign the pins freely, so you can.  But I would suggest using a breakout board that supports +24vdc logic, Like the C25XP or C79.  +24vdc logic works better in noisy environments. 
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