Output Specification
ADSI16 for WS position sensors
· Resolution 16 bit, data transmission synchronous serial/SSI
· Optional available with 12 bit (ADSI) or 14 bit (ADSI14) resolution
· No loss of data at power-down
· Easy to connect to PLC’s with SSI input circuit
The sensing device of the ADSI is a precision potentiometer. The position information is
given by an analog/digital converter output serialized as a data word. Data transmission
takes place by means of the signals CLOCK and DATA. The processing unit (PLC, Micro-
computer) sends pulse sequences which clock the data transmission with the required
transfer rate. With the first falling edge of a pulse sequence the position of the sensor is
recorded and stored. The following rising edges control the bit-by-bit A/D conversion,
encoding and output of the data word. After a delay time the next new position information
will be transmitted.
Description
Data Format
(Train of 26 Pulses)
Output
EIA RS-422, RS-485, short-circuit proof
11 ... 27 VDC
Signal Conditioner
ADSI
Excitation voltage
Excitation current
Clock frequency
Code
200 mA max.
70 ... 500 kHz
A/D converted
synchronous serial
Gray code, continuous progression
T=30 µs min.
Delay between pulse trains
Resolution
16 bit (65536 counts) full scale; optional 12 bit
or 14 bit
Stability (temperature)
Operation temperature
EMC
50 x 10-6 / °C full scale
-20 ... +85 °C
According to EN 61326:2004
Sensor circuit
Cable
Subsequent circuit
Recommended
Processing
Input Circuit
GND (0V)
Cable length
Baud rate
Note:
Transmission rate
Signal Wiring
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
< 300 kHz
< 100 kHz
< 100 m
Signal names
Connector pin no.
Mating connector: view to solder terminals
Excitation +
Excitation GND (0V)
CLOCK
1
2
3
CLOCK
4
DATA
5
DATA
6
Screen
not connected
CONN-DIN-8F-W
CONN-M12-8F-G
ASM
64
CAT-WS-E-05
www.asm-sensor.com
ASM-SENSOR [ ASM GMBH ]
