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CHAPTER 2:
2.1
Introduction
This Chapter describes the operating modes that do not require programming and monitoring the
power supply via its communication interfaces: LAN, USB, RS232/RS485, Optional communication
or by remote analog signals. Ensure that the REM indicator on the display is off (indicating Local
mode). If the REM indicator is on, press the Front Panel SYST button, PANEL ULOCK is seen on the
display. Press Current encoder to unlock.
For information regarding remote analog programming, refer to CHAPTER 3:FRONT/REAR
PANEL CONTROL & CONNECTORS.
For information regarding usage of the LAN, USB or serial communication interfaces refer to
section 4.2.2.
The power supply has three operating modes. The two basic operating modes are: Constant
Voltage mode and Constant Current mode. The mode in which the power supply operates at any
given time depends on the output voltage setting, output current limit setting, and the load
resistance. The third operation mode is the Constant Power mode. In this mode a power limit is
created by an internal algorithm. Refer to section 5.5 for further explanation.
2.2
Load Connections Options
2.2.1
Connecting Single Loads, Local Sensing (Default)
Figure 2–1 shows recommended load connections for a single load. This connection is for local
sensing mode. Local sensing is suitable for applications where load regulation is less critical.
POWER
SUPPLY
LOCAL OPERATION
Load lines, twisted pair, shortest length possible.
+V
-V
Figure 2–1: Single Load Connection, Local Sensing
23
+
LOAD
-
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