Ssi Absolute Encoder - Copley Controls Xenus Plus XEL Series Manual

MoToR ConnECTionS (ConT'D)

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 XEL
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.
Encoder
1
FG
9
Clk
8
15
Data
14
+5V 17 6
16 5 25 26
0V
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
FG
Clk
Data
sin
cos
+5V
0V
Copley Controls, 20 Dan Road, Canton, MA 02021, USA
Tech Support: E-mail: sales@copleycontrols.com, Web:
Xenus
J10
Frame Ground
Clk
A
Clk
121
B
/Clk
MAX3362B
Dat
A
Data
121
/Dat
B
MAX3362B
+5V Out2 @ 400 mA
Signal Ground
J10
1
Frame Ground
Clk
9
A
Clk
121
B
/Clk
8
MAX3362B
Dat
15
A
Data
121
/Dat
B
14
MAX3362B
10k
Sin(+)
19
-
Sin
121
Sin(-)
18
+
10k
10k
Cos(+)
21
-
Cos
121
Cos(-)
20
+
10k
17 6 +5V Out2 @ 400 mA
16 5 25 26
Signal Ground
Plus
EtherCAT
BiSS 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
Encoder
nikon-A ABSoLUTE EnCoDER
The nikon A interface is a serial, half-duplex type that is
electrically the same as RS-485
SD
D-R
Cmd
MAX3362B
Tel: 781-828-8090
http://www.copleycontrols.com
XEL
BiSS
Xenus
J10
1
FG Frame Ground
Master
MA+
9
121
MA-
8
MAX3362B
Slave
SL+
15
121
SL-
14
MAX3362B
6
V+ +5V output @ 400 mA
5
V- Signal Ground
Nikon-A
J10
Encoder
5V
1
1.2k
SD+
15
220 121
SD-
14
1.2k
+5V
+5V Out2
V+ 17 6
@ 400 mA
0V
16 5 25 26
V-
Signal Ground
Fax: 781-828-6547
Page 14 of 28
RoHS
Clk
Data
Cmd
D-R
SD
MAX3362B