Siemens SIMATIC ET 200S Manual page 57

Table 3-4 Electronic modules and the applications for which they are suitable, continued
•
Detection and evaluation of
path positions by means of
absolute position encoders absolute position encoders
(SSI)
•
Simple positioning tasks
• Driving power circuits of
stepper motors
•
Positioning stepper motors
•
Output of pulses in 4
different operating modes
• Controlled positioning,
incremental encoder
5V differential signals
•
Controlled positioning, SSI
sensor
•
RS-232C/RS-422/RS-485
serial data transmission i l d t t i i
•
Reservation of a slot for
any electronic module l t i d l
ET 200S Distributed I/O System
EWA-4NEB780602402-09
Applications
Absolute position encoder:
13 bits/21 bits/25 bits
5-V pulses up to 204 kHz
Min. pulse duration of
200 µs
Drive controlled by means
of digital outputs: travel
minus, travel plus, rapid
traverse/creep speed
Drive controlled by means
of analog output ±10 V
Drive controlled by means
of digital outputs: travel
minus, travel plus, rapid
traverse/creep speed
Drive controlled by means
of analog output ±10 V
ASCII and 3964(R) protocol
Protocol mode and USS
Width 15 mm
Width 30 mm
Configuration Options
Electronic module
1SSI
1STEP 5 V/204 kHz
2PULSE
1POS INC/Digital
1POS INC/Analog
1POS SSI/Digital
1POS SSI/Analog
1SI 3964/ASCII
1SI Modbus/USS
RESERVE
3-11