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ForumWelcome: CNC support Forumconvert Step/dir signal's to 24VD …

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convert Step/dir signal's to 24VDC

#1 · 16 February 2026, 16:13

hello,

can i use those optocouplers:

https://www.phoenixcontact.com/de-de/produkte/solid-state-relaismodul-dek-oe-5dc-24dc100khz-2964270

to convert step/dir signal to 24 VDC

#2 · 19 February 2026, 12:34

Please describe your input signal and the output signal you want to achieve. What do you want to connect to what?

#3 · 20 February 2026, 20:04

i want to connect STEP[0]+ and STEP[0]- from CSMIO to A1/A2 of the optocoupler

and the use the output from the optocoupler for the Stepsignal (witch is 24VDC) of my drive controller.

#4 · 23 February 2026, 14:18

Here is a converter doing exactly that - it takes a differential signal and has OC outputs that can be pulled to 24V. https://en.cs-lab.eu/product/line-receiver-universal-converter-of-differential-signals-ttl-into-digital-signals-ttl-or-oc/

Notice that 24V signalling usually has a much lower frequency limit, so it is worth checking if this wouldn't be a problem in your application.

#5 · 3 March 2026, 19:22

I'm thinking about doing the same thing - my reasoning being that I want to upgrade my CNC plasma table to Teknic servos, and 5V output on Step/ Dir means this **might** not work super reliable with the servos on a longer runs of cable, considering voltage drops etc?

Does CSLab have a guide highlighting best practices for integrating the IP-M/ IP-S with teknic servos, since Teknic also recommends usage of resistors on cable runs >10f - easy to exceed on a 4'x8' table.

#6 · 4 March 2026, 17:11

#7 · 11 March 2026, 11:11

As far as I can see, Teknic servos support differential inputs, so converting the CSMIO/IP signal to 24V is pointless and strongly not recommended in such a case. Voltage drop is not so important because differential receivers in the drive are usually operating in quite wide range of input signal level. What is important - use good shielded cable with twisted pairs for step/dir direction to the drive, and connect cable shield to GND (not PE!) on CSMIO/IP side only (leave shield not connected on drive side). Also try to separate these control cables from high current/noise sources as good as possible.