Installing The Interlock Circuit - Keysight Technologies B2961A User Manual

WARNING
Figure 3-12
Shielding box
Access door
Interlock circuit
Requirements

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.
B2961A/B2962A cannot apply high voltages over 42 V when the Digital I/O
interlock terminal is open. To perform high voltage measurements, the
B2961A/B2962A 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.
Interlock Circuit
Mechanical switches
• LED (Keysight part number 1450-0641 or equivalent), 1 ea.
• Mechanical switch (Keysight N1254A-402 or equivalent), 2 ea.
Resistor, 500  to 1 k (choose lower one to get higher output of LED), 1 ea.
•
Keysight B2961A/B2962A User's Guide, Edition 3
D-sub connector
LED
or
Positive
Negative
R
24, 25
R
22
15, 19 15, 19
16, 17
14 14
17, 18 24
16 22, 23
R: 500 Ω to 1 kΩ
Installation
Installing the Interlock Circuit
Figure 3-12. The circuit
25
Dsub cable
B2961A/B2962A
Digital I/O
3-27