Sequoia / Tahoe Series User Manual California Instruments
68 M447352-01 REV-A
3.8.7 External Sense Connector
Pin Description
1 Phase A sense
2 Phase B sense
3 Phase C sense
4 Neutral sense
Table 3-23: External Sense Connector
3.8.8 RS-232C Serial Interface
RS-232C Figure 3-20, Table for connector type and Table 3-25 for pin descriptions. The power source
functions as Data Circuit-terminating Equipment (DCE). The cable connecting to the Data Terminal
Equipment (DTE) should be straight-through (one-to-one contact connections). For EMC considerations a
ferrite core can be added to the cable Ametek P/N: 991-642-28, Manufacturer P/N: CS28B0642.
Figure 3-20: RS-232C Interface Connector
Connector Type
RS-232C Interface 9-contact receptacle (female) Subminiature-D.
Table 3-24: RS-232C Interface Connector Type
Pin# Name DCESignal Direction
1 N/C N/A N/A
2 TxD TransmitData Output
3 RxD ReceiveData Input
4 N/C N/A N/A
5
Common
N/A N/A
6 N/C N/A N/A
7 RTS RequesttoSend Input
8 CTS CleartoSend Output
9 N/C N/A N/A
Table 3-25: RS-232C Interface Connector Pinout
3.8.9 USB interface
USB remote control interface is made through a Series-B device connector located on the rear panel; refer
to Figure 3-21 for view of connector, Table 3-26 for the connector type and Table 3-27 for pin descriptions.
A standard USB cable between the Asterion Series power source and a computer should be used. For
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