14
EP100 Master Instruction
_____________________________________________________
D00002-C-04
7.3 Setting of Input Signal Range
The following input signal ranges can be set for the
EP100 via switches 4 to 7:
0%
100%
item
S4
S5
S6
S7
4mA
20mA A
I
I
I
I
4mA
12mA
B
I
I
II
I
12mA 20mA
C
I
I
II
II
20mA 4mA
D
II
II
I
I
20mA 12mA
E
II
II
II
I
12mA 4mA
F
II
II
II
II
The switch positions for the setting of various
signal ranges are imprinted on the electronics. See
illustration.
For 4 to 20mA the switches 4 to 7 are set to
position “I” (as
shown).
This concludes the setting of the input signal
range!
Split Range
If several positioners are operated at one current
loop in sequence with the standard signal 4 to 20
mA, individual valve positions may be allocated to
each device, which also may overlap if necessary.
This function is useful if an additional control range
is demanded which cannot be covered by one
valve only. A valve of smaller nominal size can be
applied overtaking the smallest quantities; a
parallel mounted valve of bigger nominal size
takes on the larger quantities.
Example:
Setting the signal range to 12 to 20 mA
It is recommended to shut off current of the
positioner prior to resetting of the input signal
range (turn-off input signal).The switches 4 and 5
are set to position “I” and switches 6 and 7 to
position “II”.
The individual switch positions are shown in the
following illustration.
Split range, subdivision of input signal range Example: At low
current, only the smaller valve positions; from approx. 50 %
the large valve is added
