Hello Dears, 7i77 has tow separate vin one for logic power and the other one for supply field power to outputs.and also it can be supplied with one power source logic power and it will use it to supply field outputs, and you can decide what you prefer to use and set w1 jumber.
Regarding to manual. VIN POWER SOURCE The isolated field I/O on the 7I77 runs from a switching power supply that can be powered by field power or a separate supply (VIN) with ground common with field power. Normally the 7I77's VIN will be powered with field power. An on card jumper, W1 allows VIN to be connected to field power. If you wish to use a single power supply for the 7I77s field outputs and field logic power, W1 should be placed in the left hand position. This connects field power to VIN. If you wish to use a separate supply for VIN, W1 Should be placed in the right hand position.) I used 7i77 6 times before for 6 different machines and running it with single power supply for logic and output fileds by applying power on pin 5 and common on pin8 and set W1 in left hand position. Good luck. Reda Elraey On Fri, Dec 28, 2018, 5:23 AM Greg Bentzinger via Emc-users < [email protected]> wrote: > . > 7i77 – Trying to understand TB2 > > Pin 1 – VFIELD – FIELD Power 8-32V > Pin 2 – VFIELD – FIELD Power 8-32V > Pin 3 – VFIELD – FIELD Power 8-32V > Pin 4 – VFIELD – FIELD Power 8-32V > Pin 5 – VIN – FIELD I/O Logic Power 8-32V > Pin 6, 7 – NC > Pin 8 – Ground – COMMON > > So – are pins 1-4 common to each other, not common and can be supplied > different voltages, common but redundant to allow for greater current > transfer. Everyone I have ask has given completely different and > conflicting answers. > Since I have no idea what the encoder current draw will be I will be > supplying TB1 with its own 5V powersupply and thus W1 will short the 2 pins > on the right (farthest from the DB25) I have a second 24V powersupply which > I have wired to each pin 1-5 with ground on pin 8. > My notes show I did this wiring 12/3/17 and have yet to actually power it > up as have yet to obtain a clear definitive answer as to if this is proper > or a potential smoke machine. > > Greg > > . > > > _______________________________________________ > 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
