User`s guide

Signal Connections • 19

3.2 Encoder Feedback Signals EA, EB and EZ

The encoder feedback signals include the EA, EB, and EZ. Every axis has

six pins for three differential pairs of phase-A (EA), phase-B (EB) and index

(EZ) input. The EA and EB are used for position counting; the EZ is used

for zero position index. The relative signal names, pin numbers and the axis

number are shown in the following tables.

CN2 Pin No Signal Name

Axis # CN2 Pin No Signal Name Axis #

13 EA1+ • 63 EA3+ ƒ

14 EA1- • 64 EA3- ƒ

15 EB1+ • 65 EB3+ ƒ

16 EB1- • 66 EB3- ƒ

31 EA2+ ‚ 81 EA4+ „

32 EA2- ‚ 82 EA4- „

33 EB2+ ‚ 83 EB4+ „

34 EB2- ‚ 84 EB4- „

CN2 Pin No Signal Name Axis #

17 EZ1+ • 67 EZ3+ ƒ

18 EZ1- • 68 EZ3- ƒ

35 EZ2+ ‚ 85 EZ4+ „

36 EZ2- ‚ 86 EZ4- „

The input circuits of the EA, EB, EZ signals are shown as follows.

Please note that the voltage across every differential pair of encoder input

signals (EA+, EA-), (EB+, EB-) and (EZ+, EZ-) should be at least 3.5V or

higher. Therefore, you have to take care of the driving capability when

connecting with the encoder feedback or motor driver feedback. The

differential signal pairs will be converted to digital signal EA, EB and EZ to

connect to PCL5023 ASIC.

PCL5023

EA, EB

EA+, EB+,

EZ+

EA-, EB-

EZ-

CN2

Inside PCI-8134