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24 34980A User’s Guide
2 Features and Functions
Safety Interlock
The Safety Interlock feature prevents connections to the Analog Buses
if no terminal block or properly- wired cable is connected to a module
(available on multiplexer and matrix modules only).
Normally, if you attempt to connect to the Analog Buses without a
terminal block or properly-wired cable connected, an error is generated.
You can, however, temporarily disable errors generated by the Safety
Interlock feature. This simulation mode may be useful during test system
development when you may not have connected any terminal blocks or
cables to your module.
This feature is available from the remote interface only
• The simulation mode applies to the entire mainframe and cannot be
selectively used on individual modules.
• When the simulation mode is enabled, the Analog Bus relays will
appear to close and open as directed. For example, no errors are
generated if you close an Analog Bus relay from the front panel, remote
interface, or Web Interface. However, remember that the Safety Interlock
feature prevents the actual hardware state of the Analog Bus relays
from being changed. When you connect a terminal block or cable to the
module, the Analog Bus relays will be closed.
• The simulation setting is stored in volatile memory and will be lost
when power is turned off. To re-enable the simulation mode after
power has been off, you must send the command again.
Remote Interface Operation: SYSTem:ABUS:INTerlock:SIMulate {OFF|ON}
CAUTION
The Safety Interlock feature is implemented in hardware on the modules
and cannot be circumvented. Regardless of whether the simulation mode
is enabled or disabled, all Analog Bus connections are prohibited as long
as no terminal block or properly-wired cable is connected to the module.