User Manual    California Instruments 
12  CSW Series 
1. Introduction 
This instruction manual contains information on the installation, operation, calibration and 
maintenance of all power systems that use the CSW5550.  
This user manual also covers higher power configurations consisting of multiple units of the 
CSW5550 operated in parallel.  Such models are the CSW11100, CSW16650, CSW22200, 
CSW27750, CSW33300, CSW38850 and CSW44400. 
 
Figure 1-1 California Instruments CSW5550 (With Rack Mount Ears) 
 
1.1 General Description 
The CSW5550 is a high efficiency, lightweight AC power source that provides a precise output 
with low distortion.  The CSW Series offers a 0-156/0-312 AC or DC voltage range.  Full power 
is available from 115/230V to full-scale voltage using a constant power mode of operation.   
Two to eight CSW5550 units can be connected in parallel as a single-phase or 3-phase power 
system for an output of up to 44.4 KVA. They can be operated with AC or DC output.  
The CSW5550 Series also offers AC+DC output mode. 
Remote Interfaces 
The CSW5550 has the standard GPIB, RS232 and USB remote interfaces. The LAN (Ethernet) 
interface is offered as an option. With the LAN interface the RS232 interface will not be 
functional.