Motech DS3640 User Manual page 17

Programmable (SCPI command only), with up to 10 sets of program and
maximum 150 steps in total
Extra 5V/1A output, suitable for fixture circuit without the need of
additional power
Precise voltage and current measurement
OVP, OCP and key-lock function
Series & parallel connection modes are applicable
Series connection mode. Max. is up to 31 units (using RS485 interface)
Mean measuring time per measurement is 50mSec
Standard USB interface
Optional interfaces:GPIB, LAN
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