Figure 3-4: Usb Connector Pin Orientation; Table 3-8: Usb Connector Pin Out; Table 3-9: Rs232 Connector Pin Out - California Instruments 2253i User Manual

User Manual
3.7.6 USB Interface – J16
A standard USB Series B device connector is located on the rear panel for remote control. A standar
USB cable between the AC Source and a PC or USB Hub may be used.
Note: Use of the USB port t
recommended, as communication may not be reliable. Use GPIB interface for multiple
power source control.
3.7.7 RS 232 In terfac e –
A standard RS232 serial interface connector is located on the rear panel on all 2253 models.
California Instruments
o control more than one power source from a single PC is not

Figure 3-4: USB Connector pin orientation.

Pin Name
1 VBUS
2 D-
3 D+
4 GND
Table 3-8: USB Connecto
J14
Pin Name
1 Not used
2 TxD
3 RxD
4 Not used
5 Common
6 Not used
7 CTS
8 RTS
9 Not used

Table 3-9: RS232 Connector pin out.

Description
+5 VDC
Data -
Data +
Ground
r pi n o ut.
Description
Output
Input
Input
Output
2253i / 2253iX
d
42