Accelnet Plus Micro Modules User Guide
16-01687 Rev 03
Copley Controls
Page 51 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.
Note the battery which must be connected. Without it, the encoder will produce a fault condition.
ENDAT SIGNALS
EnDAT
Signal
J2 Pins
Clk
ENCX1
47
/Clk
/ENCX1
48
Data
ENCA1
43
/Data
/ENCA1
44
Sin(+) *
SIN1+
36
Sin(-) *
SIN1-
35
Cos(+) *
COS1+
38
Cos(-) *
COS1-
37
+5V
+5VENC
57,58
*
Sin/Cos optional with EnDat 2.2
or any 1 Mbit or faster Endat
Sin/Cos required if EnDat 2.1 < 1 Mbit
A
A
1 3 0
1k
5V
1k
1 2 1
Sin( )
Sin( )
Cos( )
Cos( )
Sin( )
Sin( )
Cos( )
Cos( )
Dat
Dat
Clk
Clk
2 AEV, APV
C lk
Clk
G
Clk
Data
Data
Data
Data
Clk
5V
0V
5 V O ut 5 0 0 mA
SGN D
121
Sin
C os
121
sin
cos
USE PC OA D
ABS-A SIGNALS
Abs-A Signal
J2 Pins
SD+
ENCA1
43
SD-
/ENCA1
44
+5V
+5VENC
57,58
•
Absolute A
•
Tamagawa Absolute A
•
Panasonic Absolute A Format
•
Sanyo Denki Absolute A
Note: Single (outer) shields should be connected at the drive end. The inner shield is optional for
digital encoders and should only be connected to Signal Ground on the drive.
*Battery optional
J2 Sgnd Pins (APV)
3,4,18,31,32,33,34,42,49,50,59,60 (19~24)
Data
att
Absolute A Encoder
1.2k
1.2k
220
5V
SD
SD
2 AEV, APV
Data
Cm d
D
SD
Cm d
D
SD
M A 3 3 6 2
0V
5V
V
V
G
att
USE PC OA D
1 2 1
5 V
SGN D
