Aim-TTI SMU4000 Series, Инструкция по эксплуатации, Страница: 21 / 101

6 - Getting Started
High Voltage Interlock [SMU4201 only]
20 SMU4000 Series Instruction Manual
High Voltage Interlock [SMU4201 only]
The instrument contains a high voltage interlock to prevent accidental access to potentially
dangerous high voltages.
By default, the instrument is set to Low Voltage operation, restricting the maximum permitted
voltage to ±42V DC. Source level and limit settings are restricted to a maximum of ±42V DC. If
for whatever reason this voltage limit is exceeded whilst the output is running, the output will
either continue to run and limit the voltage to the maximum of ±42V DC (
Limited
), or the
output will trip to the OPEN off state condition ( Trip ). This feature can be set in the Interlock
Behaviour menu:
CNFG >
[System] Manage > [Security] Interlock Behaviour .
The status of the interlock is shown in the form of a HV/LV icon on the status bar of the user
interface home screen and can also be queried remotely.
There are three ways in which the interlock state can be changed between Low voltage
operation and full voltage operation:
1.
Password Protection: A password entry is required to enable full voltage operation. See
‘Password protection ’. Once the password is entered correctly the interlock status can be
changed by touching the LV symbol on the status bar of the home screen.
2. External DIO control: This allows for the controlling of the interlock via external circuitry.
This is primarily designed for helping to ensure the safe operation and safety of users of the
equipment when embedded into a test system or test fixture. For safety reasons, test
fixtures that may contain hazardous voltages often utilize a safety cover, a form of lid or
even complete doors to protect the user from hazardous voltage exposure. Installing a
switch on any of these and linking to the external DIO interlock control allows for the
limiting of hazardous voltages (Low voltage operation) whenever the switch is opened. For
more information on the DIO interlock control see ‘ Digital I/O’.
3. Remote interface control: The state of the interlock can be controlled directly without
password protection. The status of the interlock can also be queried remotely. See the
SMU4000 Series Programming Manual for more information.
WARNING
Enabling full voltage operation (asserting the interlock) could expose the user to potentially
hazardous voltages that could result in injury or death.
Potentially hazardous voltages of up to ±210 V may be present at the MAIN HI, F+/-, Sense HI,
S+/- and Guard terminals.
These terminals should be considered hazardous even if set to a non-hazardous voltage or
current level.
NOTE
Whenever the interlock setting is changed via the front panel or remote command, the output
is disabled for safety purposes.