Active input switch test
To guarantee the stability of the channels, the input relays are tested with the
maximum 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.
-
+
ADC
Isolated channel
-
+
ADC
Isolated channel
Chassis
1000 V DC
+
-
Figure 12.21:
Engineering input switching test
12.2.11
GN610/GN611, GN610B/GN611B protection mechanisms
Overvoltage and current protection
All signal inputs are protected against voltage overload. This is specified 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.
GN610/GN611 and GN610B/GN611B input overload protection
The input section has several methods to protect against voltage overload on
the input.
GEN3i
234
I3763-3.1 en HBM: public
