Siemens SIMATIC ET 200S Manual page 358

Digital Electronic Modules
Data for selecting an encoder
Input current for NAMUR
encoder
•
For signal "1"
•
For signal "0"
Input current for a switched
contact
•
For signal "1"
•
for "0" signal
Input current for an
non-switched contact
•
For signal "1"
•
permitted quiescent
current
Input delay
•
"0" to "1" transition
•
"1" to "0" transition
Tolerated settling time for
changeover contacts
Parallel wiring of inputs
Value status
The value status is additional binary information on a digital input signal. The value
status is input to the process image of the inputs at the same time as the signal
and supplied information on the validity of the input signal. The value status is
influenced by:
Wire-break test / short circuit
S
Flutter monitoring
S
Pulse stretching
S
Validity check of encoder type changeover contact
S
Significance of value status:
"1": Input signal is valid
S
"0": Input signal is invalid
S
11-38
to NAMUR or EN
50227
2.1 mA to 7 mA
0.35 mA to 1.2 mA
2.1 mA to 7 mA
0.35 mA to 1.2 mA
Typical 8 mA
0.5 mA
Max. 4.6 ms
Max. 4.6 ms
300 ms
No
Sensor Power Supply Outputs
Number of outputs
Output voltage
•
Loaded
Output current
•
Rated value
Additional (redundant)
supply
Short-circuit protection
ET 200S Distributed I/O System
1
Min. 8.2 V
45 mA
Not permitted
Yes, electronic
EWA-4NEB 780602402-12