Agilent Technologies 6632B, 6634B Principles of Operation, I/O Interface Signals, Introduction

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Principles of Operation

Introduction

This section describes the different functional circuits used in the dc power supply models covered in this manual. First, the I/O external signals that connect to the Agilent power supply are described. Next, the overall block diagrams for the dc power supply are described in detail.

The simplified block diagrams in this section show the major circuits on the dc power supply as well as the signals between circuits. They also show the reference designations of some of the components in the functional circuit. These same reference designators are shown in the schematic diagrams in Section 6.

I/O Interface Signals

Table 4-1 describes the interface signals between the power supply and the end user (or other external circuits and devices).

	Table 4-1. Power Supply Interface signals
Connector	Signal	Description
Front panel outputs	+OUT	Positive DC output voltage
	-OUT	Negative DC voltage (or return)
Rear panel	+OUT	Positive DC output voltage
output/sense screw	-OUT	Negative DC voltage (or return)
terminals	+ sense	+OUT sensing terminal
	- sense	-OUT sensing terminal
	common	connected to ground conductor
INH/FLT connector	pin 1	FLT/INH mode1	Digital I/O mode
		FLT output	OUT 0
	pin 2	FLT Common	OUT 1
	pin 3	INH Input	IN 2/OUT 2
	pin 4	INH Common	Common
		1as-shipped configuration
RS-232 connector	XON-XOFF	uses ASCII control codes DC# and DC1
	RTS-CTS	uses Request-To-Send and Clear-To-Send lines
	DTR-DSR	uses Data-Terminal-Ready and Data-Set-Ready lines
	NONE	there is no flow control
GPIB connector	GPIB/IEEE 488	Provides the interface to an external GPIB controller
Ac input connector	ac mains	Can be 100 Vac, 120 Vac, 220 Vac or 240 Vac Input

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