5 - 10 Users Manual
5.5.2 Local and remote sensin
All models have the ability to sense the output volta
e locally or remotely. The
wires between an output channel and the connected load have a resistance,
which causes a volta
e drop. If the volta
e drop is not acceptable, remote sensin
must be applied.
The formula to calculate the volta
e drop is V
drop
= I
load
x R
lead
:
• V
drop
= the total volta
e drop of both wires
• I
load
= the current throu
h the load
• R
lead
= the total resistance of both wires between the power supply and the
load
Fi
ures 5.5.5 and 5.5.6 show the difference between a local and remote
connection has been indicated.
CAUTION: To prevent shock or short-circuit you must set the power supply to
the standby mode before makin
any chan
es in the output
channel connections or you must disable the output channel (only
possible for multiple output models).
All the models and their output channels have the same terminal block (see the
followin
dia
ram). This means that all output channels have the local or remote
sensin
feature. The load is supplied with power (volta
e and/or current) throu
h
the output terminals -V and + V. The readback of the output volta
e is done
throu
h the input terminals -S and + S.
+S
+V
V
S
R
1
2
lead
R
2
1
lead
R
load
ST5836
Fi
ure 5.5.4 Volta
e drop due to Wire Resistance R
lead
.
