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GEN7iB

230

INPUT CARDS

Active input switch test

To guarantee the stability of the channels, the input relays are tested with the maxi-

mum input voltage (1000 V) applied. The inputs of the channels have been switched

from isolated GND to DC by the input relay, resulting in the 1000 V being applied to the

input as a step pulse.

This test is performed with the highest input range (± 1000 V) and repeated with the

lowest input range (± 20 mV). Both tests are performed with an input voltage of 1000 V

and repeated over 1000 times. These tests have all passed successfully.

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Fig. 12.52 Engineering input switching test

12.3.9 GN610B/GN611B protection mechanisms

Overvoltage and current protection

Allsignalinputsareprotectedagainstvoltageoverload.Thisisspeciedat±1000V

for all ranges, except for the ± 1000 V range that is limited to ± 1250 V. Exceeding these

limits can damage the input card.

GN610B/GN611B input overload protection

The input section has several methods to protect against voltage overload on

the input.

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HBK GEN7iB GEN Series Specifications

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