10
Keysight 34931A-34933A User’s Guide
Operating Considerations
Connection to Voltage Sources
Although flexible, it is possible to connect more than one source at the same time
with a matrix. Make sure that dangerous or unwanted conditions are not created
by these connections.
Electrical Considerations
See the
Introduction to the Plug In Modules
chapter of the 34980A Mainframe
User’s Guide
for detailed environmental operating conditions for the 34980A
mainframe and its installed modules. That guidance sets maximum per channel
current and power ratings at rated voltage for pollution degree 1 (dry) and
pollution degree 2 (possible condensation) conditions, for each of the matrix
modules.
NOTE
Safety Interlock
The Analog Buses of the 34980A are capable of carrying
300V signals. The matrix modules have a hardware
Safety Interlock
feature that
automatically opens the Analog Bus relays when the associated interlock pins on
the D-sub connectors (faceplate) lose continuity. This prevents signals on the
Analog Buses from being present on the D-sub connector pins. Optional terminal
blocks available from Keysight automatically provide continuity for these
interlock pins. If cables are used, you must provide continuity for the interlock
pins in your DUT assembly. See the pinout information later in this manual for
the location of interlock pins on each module.
The matrix modules have Analog Bus relays on Bank 2 only. Therefore, the
interlock pins are present on only the Bank 2 D-sub connectors.
Normally, if you attempt to connect to the Analog Buses without
a terminal block or cable connected, an error is generated. The
SYSTem:ABUS:INTerlock:SIMulate
command allows you to temporarily
disable errors generated by the Safety Interlock feature and enables the
simulation mode. Although Safety Interlock errors are suppressed in this mode,
the actual Analog Bus relays affected by the Safety Interlock are disabled as
long as no terminal block or cable is connected to the module.