PMA KS 98, Manual

Page: 19 / 246

6.5 Analog inputs (
r
connecting diagram)
Thermocouples (a)
No lead resistance adjustment is necessary.
Internal temperature compensation : the compensating lead must be taken up to the instrument terminals.
In AINP1
STK = int.TC
must be configured.
External temperature compensation : use a separate cold-junction reference with fixed reference temperature. The com-
pensating lead is taken up to the cold-junction reference, whilst the lead between cold-junction reference and instru-
ment can be of copper.
In
AINP1
STK = ext.TC
and with
TKref =
the reference temperature must be configured.
Resistance thermometer Pt 100 in 3-wire connection (b)
No lead resistance adjustment is necessary, provided that RL1 = RL2.
Resistance thermometer Pt 100 in 2-wire connection (c)
Lead resistance adjustment is necessary: make Ra equal to RL1 + RL2.
Two resistance thermometers Pt100 in difference connection (d)
Compensating the lead resistances: proceed as described
r
24 .
Resistance transducer (e)
Calibrating the measurement: proceed as described
r
24 .
Standard voltage signals 0/2...10V (g)
Input resistance:
?
100 k
[
, Configure scaling and digits behind the decimal
point. INP5 is a difference input, the reference potential of which is connected
to terminal A9. With voltage input, A6 must always be connected with A9.
Standard current signals 0/4...20 mA (f)
Input resistance: configure 50
[
, scaling and digits behind the decimal point.
Supply voltage -50...1300mV DC
(only INP3 on instruments with order no. 9407-9xx-x2xx1):
With type =0...20mA, the input is designed for -50...1300 mV. For using the INP3 output with this scaling, set x0 to -50
and x100 to 1300.
a
Inputs INP1 / INP6 are interconnected. This must be taken into account, if both inputs must be used for standard
current signals. If necesary, a galvanic isolation must be used.
9499 040 50611
Electrical connections
19 Analog inputs (
r
connecting diagram)