Accelnet Plus Micro Modules User Guide
16-01687 Rev 03
Copley Controls
Page 88 of 139
EnDat Absolute Encoder
The EnDat interface is a Heidenhain interface that is similar to SSI in the use of clock and data
signals, but which also supports analog Sin/Cos channels from the same encoder. The number
of position data bits is programmable as is the use of Sin/Cos channels. Use of Sin/Cos
incremental signals is optional in the EnDat specification.
Absolute A Encoder
The Absolute A interface is a serial, half-duplex type that is electrically the same as RS-485
Sin( )
Sin( )
Cos( )
Cos( )
Sin( )
Sin( )
Cos( )
Cos( )
Dat
Dat
Clk
Clk
2 AEV, APV
C lk
Clk
Clk
Data
Data
Data
Data
Clk
5V
0V
5 V E N C
SGN D
5VENC
SGND
121
Sin
C os
121
Sin
Cos
1k
1k
130
121
A
A
P1 AEZ, APZ
5V
Absolute A Encoder
1.2k
1.2k
220
5V
SD
SD
P1 AEZ, APZ
2 AEV, APV
Data
Data
Cm d
D
SD
Cm d
D
SD
M A 3 3 6 2
0V
5V
V
V
SGN D
att
att
121
