EP100 Master Instruction
21
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D00002-C-04
11.1.1 2-wire limit switches
The limit switch module
type “
T/U
”
contains two 2-wire
sensors (Type SJ2-N or SJ2-SN) according to the
DIN 19234 or NAMUR (power supply 8 Volt DC).
Connection to a switching amplifier with integrated
control circuit.
41
(+) Sensor 1
42
(-) Sensor 1
51
(+) Sensor 2
52
(-) Sensor 2
11.1.2 3-wire limit switch
The limit switch module
type “
R
”
contains two 3-wire
sensors (Type Si2-K08-AP7), 10..30 Volt DC,
normally closed, PNP-Output.
41
(-) Sensor 1 and Sensor 2
43
(+) Sensor 1 and Sensor 2
42
Switchable output Sensor 1
52
Switchable output Sensor 2
11.2 Position-feedback transmitter 4 - 20mA
The electrical position-feedback transmitter is an
accessory either installed in the factory (no retrofit
possible). It converts the rotary movement of an
actuator into an electrical standard signal 4...20mA.
The start-up procedure is described in step 7.1
–
7.7.
The electronic connection of the position transmitter
must be assured. Both LED’s are then light up.
Adjusting the start of the measuring range (4mA)
a) Move the actuator to the starting position.
b)
Press push button S1 „Config Output 4mA“ longer
than 2s. During this time LED 1 lights up. After 2s both
LED’s are light up again, the value for 4mA is stored.
Adjusting the end of the measuring range (20mA)
a) Move the actuator to the end position.
b)
Press push button S2 „Config Output 20mA“ longer
than 2s. During this time LED 2 lights up. After 2s both
LED’s are light up again, the value for 20mA is stored.
Random adjustment of the current values
at the end points
a) Move the actuator to the end position, where you
want to adjust the current.
b) Press both buttons simultaneously for about 2s.
Then both LED’s are alternating flashing in a slow
frequency.
c)
With push button S1 „Config Output 4mA“ the
output current value can be decreased and with
push button S2 „Config Output 20mA“ the output
current value can be increased. Pressing the
buttons for a short moment results in a small
change and pressing the button for a longer time
results in a fast mode for a bigger change. The
value of the current can be freely decreased
between about 3,3 and increased up to 22,5 mA.
d) Without any additional manipulations of the push
buttons the new value is automatically saved. After
a few seconds, the device returns into the normal
operating mode, indicated by both LED’s that are
then light up again.
Trouble shooting of the position transmitter
The components of the position transmitter are under
constant surveillance by the installed micro controller.
Errors are detected and indicated when both LED’s
are off or both LED’s are parallel flashing at a fast
frequency.
In the event of a fatal error, e.g. potentiometer not
connected, an output current of more then 24mA will
be shown in addition to the error indication given by
the LED’s (fast flashing).
In this case check the following:
a) if the potentiometer is correctly connected to the
electronic board.
b) if the potentiometer is within its working span.
When both LED’s are off, the supply voltage
should be checked (minimum tension, polarity).
