POSICHRON®
Output Specification SSI
The data transmission takes place by means of the two signals CLOCK and DATA. The
Description
processing unit (PLC, Microcomputer) sends pulse sequences which clocks the data
transmission at the required transfer rate. With the first falling edge of the pulse sequence
the position of the sensor is recorded and stored. The following rising edges control the
bit-by-bit transmission of the data word. After a delay time the next new position information
will be transmitted.
Data Format
(Train of 26 pulses)
Output
EIA RS-422, RS-485, short-circuit proof
+12 … +27 V DC, residual ripple 10 mVss
150 mA max. without load
100 kHz ... 1 MHz
SSI
Excitation Voltage
Excitation Current
Clock Frequency
Code
(synchronous serial)
Gray 24 bit, continuous progression
2 µm max.
Resolution
Delay between Pulse Trains
Stability (Temperature)
Operation Temperature
Immunity to Interference (EMC)
>25 µs
20 x 10-6 / °C full scale
-40 ... +85 °C
According to EN50082-2, EN50081-1
Sensor circuit
Cable
Subsequent circuit
Signal diagram
DATA
DATA
CLOCK
CLOCK
Cable length
Baud rate
Note:
Extension of the cable length will reduce the
maximum transmission rate.
The signals CLOCK/CLOCK and DATA/DATA
must be connected in a twisted pair cable,
shielded per pair and common.
50 m
100 m
100 … 1000 kHz
100 … 300 kHz
WS-CONN-D8
Cable colour
Signal name
Connector pin no.
Signal Wiring /
Connection
Excitation +
Excitation GND (0V)
CLOCK
1
2
3
4
5
6
white
View to sensor
brown
connector
green
CLOCK
yellow
grey
CONN-M12-8P-X
DATA
DATA
pink
ASM GmbH
CAT-PC-E-04
57
Tel.: +49-8123-986-0 Fax: +49-8123-986-500 www.asm-sensor.com
ASM-SENSOR [ ASM GMBH ]
