ETC CEM3 v1.5.1 - Manual (Page 18)

12 CEM3 User Manual
Latch-Lock
Latch Lock is a control mode available to any dimmer circuit (see Control:, page 20 ). Similar
to switched mode, Latch-Lock features an additional safeguard so that circuits can not be
turned on or off as easily. The circuit only turns on when a defined control level range is
held for a specified amount of time, and only turns off when a different control level range
is held for another amount of time. Latch-lock is useful for avoiding accidental dowsing of
arc lamps during shows (often caused by running the Grandmaster down). By requiring a
level range and time, most master fades will not hover in a given range for long enough to
trigger on or off.
The level ranges and times can be edited on a per dimmer basis (see Dimmer Property
Definitions, page 19 ). On and Off level ranges may not overlap.
Lug
“Lug” refers to a physical position in the rack. Lugs are always numbered counting
downwards from the top of the rack, starting at “1.” Some modules may take up multiple lug
positions in the rack.
Panic
CEM3 offers a Panic capability that complies with UL 924 Panic functionality.
When a properly connected and enabled CEM3 has a panic “look” stored, when it receives
a signal over the panic circuit it will automatically play the recorded look.
Panic can be enabled when a maintained (normally open or normally closed) contact
closure is properly wired to the backplane (for more information, see the data termination
guide or installation guide that was supplied with the rack).
For information on how to configure Panic on your CEM3, see Setting Up Panic, page 35 .
Level
Time
LatchLock On Range
LatchLock On Time
LatchLock Off Range
LatchLock Off Time
In this range the control source can go
to any level, as long as it does not stay
in the off time range for more than the
latchlock off time value
Control Level
Relay Closes Relay Opens
Diagram of How Latch-Lock is Applied to a Circuit