Installing The Interlock Circuit - Keysight B2980B Series User Manual

Installation

Installing the Interlock Circuit

Installing the Interlock Circuit

This section is applied to Keysight B2985B/B2987B which supports the interlock
function. The interlock circuit is a simple electric circuit, as shown in
The circuit electrically opens when an access door is opened, and closes when the
door is closed.
The B2985B/B2987B cannot apply high voltages over  21 V when the interlock
terminal is open. To apply high voltage, the B2985B/B2987B interlock terminal
must be connected to the interlock circuit installed in the measurement
environment such as the shielding box. The interlock circuit is important and
necessary to prevent electrical shock when the user touches the output terminal.
Potentially hazardous voltages of up to  1050 V may be present between the
High and Low terminals of the Voltage Source when the interlock circuit is
closed. To prevent electrical shock, do not expose the line.
Des tensions potentiellement dangereuses jusqu'à 1050 V risquent d'être
présentes entre les bornes Haute et Basse de la tension de la source lorsque le
circuit de verrouillage est fermé. Afin d'éviter toute décharge électrique,
n'exposez pas ces lignes.
Requirements
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Procedure 1. Mount two mechanical switches onto your shielding box, so that the switches
2. Mount an LED onto your shielding box. See
68
LED (Keysight part number 1990-0486 or equivalent), 1 ea.
Mechanical switch (Keysight N1254A-402 or equivalent), 2 ea.
Interlock connector head, 4-pin plug, 1 ea., furnished, Phoenix Contact
1881341 (4 pin) or equivalent
Connection wire, needs enough length from the shielding box to the Interlock
connector on the B2985B/B2987B rear panel
close when the access door is closed, and open when the door is opened. See
Figure 2-4 for the switch dimensions (typical).
(typical).
Figure 2-3 for the LED dimensions
Keysight B2980B User's Guide, Edition 1
Figure 2-2.