Elster EK280 - HF Pulse Inputs (High Frequency); Encoder Input

24 Technical data
Data
Value
Unit
Open-circuit voltage U
0
5.0
V
Internal resistance R
I
1
MΩ
Short circuit current I
K
5
μA
Switch point "ON":
 Resistance R
e
max.
100
kΩ
 Voltage U
e
max.
0.8
V
Switch point "OFF":
 Resistance R
a
min.
2
MΩ
 Voltage U
a
min.
3
V
Pulse duration t
e
min.
62.5
ms
Pause duration t
a
min.
62.5
ms
Counting frequency f
max.
10
Hz
Counting frequency f for input 3
max.
6
Hz
3.6.2 HF pulse inputs (high frequency)
High frequency pulse transducers can only be connected to inputs 1 and 2
(terminals DE1 and DE2) (see chapter 5.2.1.3).
Data
Value
Unit
Open-circuit voltage
7.5 ... 8.5
V
"High" switching level
max. 1.2
mA
"Low" switching level
min. 2.1
mA
Input frequency
max. 2500
Hz
3.6.3 Encoder input
An encoder can only be connected to input 1 (terminal DE1).
Data
Value
Unit
Encoder protocol
Namur, SCR
-