XPL
Copley Controls, 20 Dan Road, Canton, MA 02021, USA
Tel: 781-828-8090
Fax: 781-828-6547
Tech Support: E-mail: [email protected], Web:
http://www.copleycontrols.co
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Page 14 of 28
RoHS
Xenus
Plus
CANopen
SSI ABSOLUTE ENCODER
The SSI (Synchronous Serial Interface) is an interface used to connect an
absolute position encoder to a motion controller or control system. The XPL
drive provides a train of clock signals in differential format to the encoder which
initiates the transmission of the position data on the subsequent clock pulses.
The polling of the encoder data occurs at the current loop frequency (16 kHz). The
number of encoder data bits and counts per motor revolution are programmable.
The hardware bus consists of two signals: SCLk and SDATA. Data is sent
in 8 bit bytes, LSB first. The SCLk signal is only active during transfers.
Data is clocked out on the falling edge and clock in on the rising edge of
the Master.
-
+
-
+
A
B
A
B
Encoder
Xenus Plus
121
Sin(+)
Sin(-)
Cos(+)
Cos(-)
Dat
/Dat
Clk
/Clk
121
FG
Frame Ground
J10
Clk
Data
MAX3362B
MAX3362B
Data
Clk
9
8
1
15
14
+5V
0V
+5V output @ 400 mA
Signal Ground
6
21
20
10k
10k
121
Sin
Cos
10k
10k
121
sin
cos
19
18
5
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.
Encoder
121
121
Clk
/Clk
Dat
/Dat
FG
Frame Ground
J10
Clk
Data
MAX3362B
MAX3362B
Data
Clk
+5V
0V
+5V output @ 400 mA
A
A
B
B
Signal Ground
9
8
1
15
14
6
5
B
i
SS ABSOLUTE ENCODER
BiSS is an - Open Source - digital interface for sensors and actuators.
BiSS refers to principles of well known industrial standards for Serial
Synchronous Interfaces like SSI, AS-Interface® and Interbus® with
additional options.
Serial Synchronous Data Communication
Cyclic at high speed
2 unidirectional lines Clock and Data
Line delay compensation for high speed data transfer
Request for data generation at slaves
Safety capable: CRC, Errors, Warnings
Bus capability incl. actuators
Bidirectional
BiSS B-protocol: Mode choice at each cycle start
BiSS C-protocol: Continuous mode
NIkON-A ABSOLUTE ENCODER
The Nikon A interface is a serial, half-duplex type that is
electrically the same as RS-485
BiSS
Encoder
Xenus
121
121
MA+
MA-
SL+
SL-
FG
Frame Ground
J3
Clk
Data
MAX3362B
MAX3362B
Master
Slave
V+
V-
+5V output @ 400 mA
Signal Ground
9
8
1
15
14
6
5
Nikon-A
Encoder
Xenus
121
1.2k
1.2k
220
5V
SD+
SD-
0V
+5V
J10
1
15
14
V+
V-
5V output
Signal Ground
6
5
Cmd
D-R
SD
MAX3362B
Cmd
D-R
SD
MAX3362B
MOTOR CONNECTIONS (CONT’D)
