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page 54 008-0608-00
9.2 Limit Operation
9.2.1 Actions When
Activated
When Limits 1, 2, 3, or 4 are activated, the following actions occur:
• The front panel light for the limit will illuminate.
• The corresponding open-collector Limit Output pin on the System connector will
be connected to the DGND (Digital Ground) pin.
• If a Relay Output channel is installed, the relay for the limit will activate.
A Relay Output channel can be installed for Limits 5, 6, 7, and 8. When these limits
are activated, the following actions occur:
• If the display is monitoring the channel of this Relay Output channel, the display
will indicate the status of these limits.
• On a Model SC3004, the front panel light for the limit will illuminate.
• The relay for the limit on this Relay Output channel will activate.
A Relay Output channel can be installed for Limits 9, 10, 11 and 12. When these limits
are activated, the following actions occur:
• If the Relay Output channel is displayed, the display will indicate the status of
these limits.
• The relay for the limit on this Relay Output channel will activate.
A Relay Output channel can be installed for Limits 13, 14, 15 and 16. When these lim-
its are activated, the following actions occur:
• If the Relay Output channel is displayed, the display will indicate the status of
these limits.
• The relay for the limit on this Relay Output channel will activate.
9.2.2 Scan Time
The “scan time” or update rate of the limits depends on how many channels are
installed in the instrument. To determine the scan time of the limits for your particular
instrument, see “
SCAN TIME
Menu Item” on page 41.