
Pin
Lead
Function
Value range
Unit
3
blue ***
Frequency signal**
0 … 10000
Hz
4
black ***
GND
0
V
** Open collector. Rectangular pulses.
*** zero volt connection
Collector resistance R
C
, minimum level
CAUTION!
The current I through the signal leads
must be limited by means of a suitably
scaled collector resistor R
C
, as other‐
wise the output transistors may be
damaged.
The lower the value of collector resistor
R
C
, the further the frequency signal can
be transported without distortion - see
quency signal lead’ on page 25.
The lower the value of collector resistor
R
C
, the higher the frequencies which
can be transported without distortion -
see
The following applies to collector resistor R
C
on
an external device:
n
It may already be integrated in the device
n
It may already be integrated in a low-pass
filter in the device
n
It may be possible to connect it on the
device
n
It may be missing entirely and must then
be screwed to the terminals.
Refer to the operating instructions for the
external device.
Search terms:
n
Collector resistor
n
Pull-up resistance
n
Open-collector input or O.C.
Tab. 3: Minimum value for R
C
dependent on
supply voltage U
Supply voltage U
R
C min
5 V
100 Ω
9 V
180 Ω
12 V
240 Ω
24 V
480 Ω
30 V
680 Ω
R
C min
= U / 0.050 A
Assembly and Installation
24