17
DO
CT
-1946C
2018-
07
322
903
Trip Amplifier 2/209
Hardware description
EN
3.6
Changing current inputs/voltage inputs
These changes should only be carried out in the laboratory.
Remove and replace jumpers as shown in the following table. Desoldering should only
be carried out using a desoldering wick. Do not use a pump as this may damage the
solder pads. The device does not have to be recalibrated once the changes have been
completed because the components are accurate to within 0.1 %.
In class 4 (DIN V 19250) applications inputs A and B may be driven from the same
source. In this case A and B are to be connected in parallel as shown in figure inputs in
parallel in section "Layout". Open all the jumpers on module B and connect the positive
end of the sister channels together.
For jumper locations see device layout in section "Layout".
3.7
Maintenance
The devices do not employ mechanical components which are exposed to wear and tear
other than the front push buttons and relays. The circuits are well selected only
incorporating high quality parts.
Therefore no regular maintenance is required as long as the maximum operating
conditions are observed. Due to the excellent long-term stability calibration of zero and
span need only be checked once a year. The relay life is given in technical data in
section "Technical data".
Input
0/4 mA ... 20 mA
jumper X9
0/1 V ... 5 V
jumper X10
0/2 V ... 10 V
jumper X11
1
A101 A501
A101 A501
A101 A501
2
A201 A601
A201 A601
A201 A601
3
A301 A701
A301 A701
A301 A701
4
A401 A801
A401 A801
A401 A801
channel/module
A B
A B
A B
