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Note
It is good engineering practice to twist and shield all signal wires to and from the analog and digital connectors
Digital Connector
This connector, which is on the rear panel, is for connecting fault/inhibit, digital I/O, or relay link signals. The connector
accepts wires sizes from AWG 22 to AWG 12.
Pin No.
Fault/Inhibit
1
FLT OUTPUT
2
FLT OUTPUT
3
INH INPUT
4
INH COMMON
NOTE: Factory default function is FAULT/INHIBIT.
Connecting the Power supply to the Load
Output Isolation
The output of the power supply is isolated from earth ground. Either output terminal may be grounded, or an external
voltage source may be connected between either output and ground. However, both output terminals must be kept within
± 240 Vdc of ground. An earth ground terminal is provided on the rear panel for convenience, such as grounding wire
shields.
The earth ground terminal on the rear panel is a low-noise signal ground for convenience only. It is not
designed to function as a safety ground.
Capacitive Loads
In most cases, the power supply will continue to be stable with additional external load capacitors. However, large load
capacitors may cause ringing in the unit's transient response. It is possible that certain combinations of load capacitance,
equivalent series resistance, and load lead inductance will result in instability. If you need help in solving a stability
problem, contact an Agilent service engineer through your local Sales and Support Office (see end of this guide).
If the power supply output is rapidly programmed into capacitive loads, the unit may momentarily cross into constant
current (CC) mode. This extends the CV programming time and limits the maximum slew rate to the programmed current
divided by the total internal and external capacitance. These momentary crossovers into CC mode will not damage the unit.
28
User Connections
FUNCTION
Digital I/O
IN/OUT 2
COMMON
Figure 4-2. Rear Panel Digital Connector
Insert Wires
ô Tighten Screws
1
OUT 0
OUT 1
2
Relay Link
RLY SEND
NOT USED
RLY RTN
COMMON
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