Samson TROVIS 6495-2, Монтаж и эксплуатация

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5-4 EB 6495-2 EN
Installation
1 2 3
4
5
Fig. 5-4: Terminal blocks 1 to 5 · Back of the
controller
Transmitter supply
The controller has a supply output to power
a maximum of four two-wire transmitters
(21 V DC, 90 mA).
Resistance thermometer
The analog inputs AI1 to AI4 are designed
for the connection of resistance thermometers
Pt 100 and Pt 1000 in a three-wire circuit.
The resistance of each connection lead must
be the same and not exceed 15 Ω. It is not
necessary to calibrate the line.
Resistance thermometers can also be con-
nected in two-wire circuits. In this case, con -
nect a jumper between the controller termi-
nals. Take into account that the lead resis -
tance may reach several ohms over long dis-
tances, causing the measured value to be
considerably distorted. This measured value
can be balanced out using a correction val-
ue (
I.1.4/I.2.4/I.3.4/I.4.4 Input sig-
nal increase/decrease configuration
item, see Annex A).
Potentiometers
The analog input AI2 is designed for the
connection of a potentiometer with two-wire
or three-wire connection. Potentiometers be -
tween 50 and 1200 Ω can be connected.
A potentiometer is used, for example for po
-
sition feedback of an electrical actuator or
for input of an external set point.
Generally, we recommend performing a us -
er calibration. To perform a calibration, use
A.20.2.13 (zero) and A.20.2.14 (end)
configuration items (see the 'Start-up and
configuration' section).
Note