I have measured the encoder's output with a multi-meter, and the voltage on the A/B pins measured the same as at the power to the encoder (11 volts) or zero. I haven't tried to feed the encoder 5v, yet to see how it responds, that is on my to do list for next week (I'm on vacation this week).
----- Original Message ----- From: "Ralph Stirling" <[email protected]> To: "Enhanced Machine Controller (EMC)" <[email protected]> Sent: Thursday, July 23, 2015 10:26:48 PM Subject: Re: [Emc-users] Encoder Voltage? The datasheet linked indicated that model has push-pull outputs, rather than open collector, so it actually is driving the output high rather than a simple pull-up. It doesn't specify what level it drives it to though. -- Ralph ________________________________________ From: Jon Elson [[email protected]] Sent: Thursday, July 23, 2015 7:16 PM To: Enhanced Machine Controller (EMC) Subject: Re: [Emc-users] Encoder Voltage? On 07/23/2015 04:27 PM, Ralph Stirling wrote: > Have you actually measured the A and B outputs of the encoder > at 10v? I see that it takes an 8-24vdc input voltage, but I would > expect it to still generate 0 and 5v output levels. Nothing in the > datasheet seems to specify the output levels for the push-pull > output option (which your p/n has). > > Pity there isn't an actual manual for the drive available, as it also > might be capable of tolerating a voltage higher than 5v on the A+ > and B+ inputs. The datasheet doesn't specify voltage levels. > > Quite likely is is an open-collector output, meaning it will ground the output when it means for it to be low, but leave it floating when it means for it to be high. If so, then you only need a resistor to pull it up to the desired voltage (like +5V) for it to meet TTL specs. Jon ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users ------------------------------------------------------------------------------ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
