ProVU4 Controller, Profiler & Recorder/Controller - Product Manual
Page 28
Electrical Installation
59407, Issue 3 – May 2011
Universal Input Connections – PT100 / NI120 (RTD) input
For three wire RTDs, connect the resistive leg and the common legs of the RTD as
illustrated. For a two wire RTD a wire link should be used in place of the third wire (shown by
dotted line). Two wire RTDs should only be used when the leads are less than 3 metres long.
Avoid cable joints.
Figure 12.
RTD Input Connections
Four wire RTDs can be used, provided that the fourth wire is left unconnected. This wire
should be cut short or tied back so that it cannot contact any of the terminals on the rear of
the instrument.
Universal Input Connections - Linear Volt, mV or mA input
Linear DC voltage, millivolt or milliamp input connections are made as illustrated. Carefully
observe the polarity of the connections.
Figure 13.
DC Volt, mV & mA Input Connections
RTD
3
2
1
+
_
_
+
m
A
m
V
/V
3
2
1
