Characteristics of the Counting Inputs
(Original Document)
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Diagram
Example of input A:
Characteristics
This table shows the characteristics of the counting inputs:
Electrical characteristics
Symbol
Value
Units
Nominal voltage
One
+/- 5
V
Voltage limit
U1
+/- 5,5
V
Nominal current
In
+/- 18
mA
Input impedance (under 5 V)
Re
270
Ohms
Voltage for "On" state
Uon
>= +2,4
V
Current at "On" state
Ion
> +3,7
mA
Voltage for "Off" state
Uoff
<1,2
V
Current at "Off" state
Ioff
<1
mA
Encoder/sensor voltage feedback check
Presence check
Compatibility of A, B, Z Inputs
RS 422 / RS 485 line transmitter outputs, 7 mA current loop Differential line monitor on each input:
Outputs complemented by 5 V totem pole supply. Differential line monitor on each input:
Characteristics of the Return +supply Encoder Inputs
Illustration:
Table of characteristics:
Characteristics
Symbol
Value
Units
Voltage for ON state (OK)
Uok
> 2,5
V
Voltage limits
Umax
30
V
Input current (2.5 < Uok < 30)
Imax
3
mA
As long as the input is active, the presence of the encoder is detected.