User Manual

2.15 Multi-unit Connection Mode (RS485)

The power supply, via the RS485 interface, provides multi-unit control

function for up to 30 units (If connecting more than 10 units, please add a 120Ω

resistor terminator to the last unit as shown in the figure below). Turn on the

system after the connection is made. Press  on the main page

and set CHAIN ON/OFF to ON (Parallel connection will be cancelled). Set each

unit with a different Address (1 - 30). Then by using USB, GPIB, or LAN,

connect the first power supply in the chain to a PC. Now, multiple units daisy-

chained via RS485 can be controlled by one PC by using the commands specific

for multi-unit connection. See “Remote Communication Protocol” section

for details.

3. Protection and Error Messages

3.1 Overvoltage Protection (OVP)

When OVP is activated and the voltage measured exceeds the set point, the