Installing The Interlock Circuit - Keysight Technologies B2961B User Manual

Installation

Installing the Interlock Circuit

Installing the Interlock Circuit

The interlock circuit is a simple electric circuit, as shown in
electrically opens when an access door is opened, and closes when the door is
closed.
B2961B/B2962B cannot apply high voltages over 42 V when the Digital I/O
interlock terminal is open. To perform high voltage measurements, the
B2961B/B2962B 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 measurement terminals.
Hazardous voltage, instrument maximum output voltage may appear at the High
Force, High Sense, and Guard terminals if the fixture cover is closed. To prevent
electrical shock, do not expose these lines.
Une tension dangereuse, une tension de sortie maximale de l'appareil peut
apparaître aux bornes High Force, High Sense et Guard si le couvercle de
l'équipement est fermé. Afin d'éviter toute décharge électrique, n'exposez pas
ces lignes.
Figure 3-12
Shielding box
Interlock circuit
92
Interlock Circuit
Access door
Mechanical switches
D-sub connector
LED
or
Negative Positive
R
24, 25
R
22
15, 19
15, 19
16, 17
14
17, 18 24
16 22, 23
R: 500 to 1 k
Keysight B2961B/B2962B User's Guide, Edition 1
Figure 3-12. The circuit
25
14
Dsub cable
B2961B/B2962B
Digital I/O