Quote Originally Posted by EddyCurrent View Post
Silyavski, I know this is not what you are after but may be of use.

Got one of these the other day, great little unit and great price.

5V 1/2/4/8 12V 16 Channel Relay Module W/ LED Indicator Light For Arduino | eBay

also these spindle boards work good and not too high a price
System4
Thanks Eddie,

I will grab one of these, just have to figure how many relays i need.

Now that i have bought the Galil 1880 and have only 1 x 100 pin cable going out of it, i have to fashion something like a terminal breakout board where to connect all the I/O signals.
Any idea what cheapo components will fit best together? I am a bit lost here and dont have the money to buy the galil I/0 board. The connecting cable it seems is SCSI 100-Pin High-Density connector, though not completely sure.



Here below are some specs from the manual of the motion control/ Chapter 3 Connecting Hardware/ :

The DMC-1700/1800 provides optoisolated digital inputs for forward limit, reverse limit, home, and abort signals. The controller also has 8 optoisolated, uncommitted inputs (for general use) as well as 8 TTL outputs and 8 analog inputs configured for voltages between +/- 10 volts. 1X80 Controllers with 5 or more axes have 16 optoisolated uncommitted inputs, 8 TTL inputs, and 16 TTL outputs.

Wiring the Optoisolated Inputs Bi-Directional Capability. All inputs can be used as active high or low - If you are using an isolated power supply you can connect +5V to INCOM or supply the isolated ground to INCOM. Connecting +5V to INCOM configures the inputs for active low. Connecting ground to INCOM configures the inputs for active high. INCOM can be located on the DMC-1700/1800 directly or on the ICM-1900 or AMP-19X0. The jumper is labeled INCOM. ....


From what i understand everything important is opto isolated. The servos i bought seem to accept various signals, still have to fight with the manual to translate things like:

Position command can correspond to the following four types of output form.
Line Driver Output
+5V Open Collector Output
+12V Open Collector Output
+24V Open Collector Output
- Line drive output may correspond up to 450 kpps, and open collector output may
correspond up to 200 kpps.

It seems that the drives accept 5v signal, but recommend external resistor and 24v signal, for interference resistance.

Still have to figure what is line drive and what is position command, it seems to me line drive could be step and direction ans position command should be differential signal.