Siemens Add 7 AddFEM Manual page 56

AddFEM
Number of inputs
Type of input to IEC 61131–2
Voltage range
0-signal level
1-signal level
Coincidence factor at operation with voltage
> 26 V
Load impedance
Current/voltage characteristic across the en-
tire operating range
Delay time (TID)
Cyclic signal evaluation every
Input frequency (f
Counter resolution
Measuring precision
Updating interval
Integration period at frequencies < 800 Hz
Filter
Sense of rotation recognition
Display
Configuration of the terminals
1)
Counting pulse inputs can also be used as digital inputs!
AddFEM
C79000–G8076–C900–03
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Counting Pulse Inputs
)
in
1)
3
Type 1/2
–28...+28 V DC
–28...+3 V
+8...+28 V
The counting pulse inputs are also specially
designed for low input voltage (high recogni-
tion from 8 V). In order to limit the power dissi-
pation the input voltage has to remain limited
to 26 V or a pulse duty factor of 60% with a
maximum pulse length of 1 minute or only 2 of
3 inputs may be switched to 1 at the same
time.
1 kΩ to 3 kΩ
Refer to Fig. 4-1!
50 µs for signal transitions from 0 to 1
50 µs for signal transitions from 1 to 0
2 ms
Disturbing pulses smaller than 10.667 µs are
filtered out.
Additional hardware evaluation by counter.
0...20 kHz
32 bits
–4
Better than 10
2 ms
20 ms
During every updating instant the frequency is
recalculated as the mean of the counting pul-
ses detected during the last 20 ms.
Sense of rotation recognition possible by inter-
connecting channel 1 and channel 2.
Refer to Chapter 3.1.3
(Possible from
Version 8 of 6DL3100–8AA, Version 7 of
6DL3100–8AB, all Versions of 6DL3100–8AC)
The converted values read by the internal mi-
cro controller unit are displayed at the LED on
the front.
Refer to Appendix A, connector X6, Page A–2
Technical Data
4-5