Table of Contents
Advertisement
2-Wire 4-20 mA Detector
Controller
R L
100 Ohms
Maximum Cable Lengths
To calculate the maximum cable run length from power source to the detector refer to the
following example diagram and formula.
Maximum cable run length = R
where:
R
=
maximum working cable run resistance
loop
V
=
maximum available supply voltage at controller
controller
V
= minimum voltage at which the connected sensor can operate (sensor dependent,
detector min
see individual sensor technical manual/data sheets)
I
=
sensor maximum drawn current (sensor dependent, see individual sensor
detector
technical manual/data sheets)
TP1MAN Issue 3 Apr 06 (MAN0630)
+ve
1
1
Signal
2
2
-ve
3
3
R
= (V
loop
controller
/ cable per metre resistance
loop
— V
) / I
detector min
Detector
+ve
1
Signal
2
3 3
detector
Installation
23
Advertisement
Table of Contents
