Hunan Next Generation Instrumental T&C Tech. Co., Ltd.
NGI
l
NGI
N36100 Series
Wide Range High Voltage Programmable DC Power Supply
18
Figure 14 4-pin Green Connector
6.5.1 Local Sense
In local sense, output voltage is adjusted at the output terminal of N36100. This way
does not compensate for the voltage drop on the load wire. It is recommended to
use local sense when the load current is low or the load regulation is not very critical.
6.5.2 Remote Sense
Due to the parasitic resistance on the wire, a voltage drop will be generated on the
wire after the current flows. Assuming that output of the power supply is set to
55V/10A and the resistance of the load wire is 0.5 ohms, a 5V voltage drop will be
generated on the wire. The actual voltage reaching the load is only 50V, which affects
the output accuracy of the power supply. In this case, it is necessary to compensate
for the voltage drop on the wire.
The remote sense wire is directly connected to the load from four-wire interface on
the rear panel of power supply. Since the remote sense wire is directly connected to
the high impedance measurement circuit inside the supply, and the current on
remote sense wire is very low, the voltage drop generated is negligible. The voltage
across the load is fed back to the power supply control loop via remote sense wire.
The supply will adjust its output to compensate for the voltage drop on the load wire
so that the voltage across the load is equal to the set voltage.
It is recommended to use remote sense when load regulation is very critical. The
procedure is as below.
1. Press the power switch to shut off the power supply.
2. Disconnect the jumpers on the 4-pin green connector.
3. Connect
S+
to positive polarity on load and
S-
to negative polarity on load with
proper wire.
4. Plug the connector into the four-wire interface on rear panel of supply.
5. Connect the output of power supply to the load.
6. Press the power switch to power on the power supply.
Note: On the 4-pin connector, jumpers have been used to connect
S+
to
+
and
S-
to
-
.
When using local sense, please put the 4-pin connector at rear panel. Unplugging the
connector will leave the remote sense terminal disconnected, which will affect the
voltage regulation and may cause the power supply to be unstable and dangerous.
