Keysight E3632A - To Replace the Power-Line Fuse; To Disconnect the Output Using an External Relay

Service 2
Keysight E3632A Service Guide 63
To Replace the Power-Line Fuse
The power-line fuse is located within the power supply's fuse-holder assembly on
the rear panel (refer to the E3632A User’s Guide). For 100 Vac or 115 Vac
operation, you must use a 4 AT slow-blow fuse (Keysight part number
2110-0996). For 230 Vac operation, you must use a 2.5 AT slow-blow fuse
(Keysight part number 2110-0999).
To Disconnect the Output Using an External Relay
When the output of the E3632A is turned off, it is implemented by setting the
output to 0 V and 0.02 A. This gives a zero output voltage without actually
disconnecting the output. To disconnect the output, an external relay must be
connected between the output and the load. A TTL signal of either low true or
high true is provided to control an external relay. This signal can only be controlled
with the remote command OUTPut:RELay {OFF|ON}. The TTL output is available
on the RS-232 connector pin 1 and pin 9.
When the OUTPut:RELay state is ON, the TTL output of pin 1 is high (4.5 V) and
pin 9 is low (0.5 V). The levels are reversed when the OUTPut:RELay state is OFF.
NOTE
– TTL output of pin 1 or pin 9 of the RS-232 connector is available only after
installing two jumpers inside the power supply. See below for more
information.
– Do not use the RS-232 interface if you have configured the power supply to
output relay control signals. Internal components on the RS-232 circuitry
may be damaged.