User and Programming Manual - Rev P
California Instruments
5.7.
DC to AC Power Module
The DC to AC power Module takes a 250V DC input and generates 0 to 135 volts AC,
directly coupled, low range output. When the DC to AC module is supplied with 400 volts
DC, the AC module generates 0 to 270 volts AC. The output converter is a PWM full bridge
topology with an LC filter on the output. The switching frequency is 34.6 kHz.
This module has pulse by pulse peak current limit and sinusoidal average current limiting to
protect the power transistor and load.
5.8.
IEEE 488/ RS232
The RP can optionally be outfitted with a combined RS232C and IEEE 488 interface board.
This board assembly has optocouplers for interface isolation.
The interface in use is selected by a DIP switch on the rear panel. Only one interface can
be active at any given time.
October 2005
RP Series
22
