Chamberlain SL3000UL Addendum To Owner's Manual page 5

Brake will keep spoked pulley from moving when engaged. Brake MUST be disengaged
to manually push gate open (Backdriven).
Solenoid Brake Disengaged
• Operator's normal gate cycle.
• AC power failure.
• Stop/Reset button has been pressed ONLY once.
Optional Factory Installed DC2000 Backup System
Opens or closes the gate with dedicated devices wired directly to the DC2000 when the
AC power fails at the operator. (Refer to pages 30 through 32 in the manual)
To reduce the risk of INJURY, dedicated devices MUST be far enough from the gate so that
the user is prevented from coming in contact with the gate while operating the controls.
The DC2000 WILL NOT operate an Emergency Key Switch (Knox
Box) wired to the operator's surge suppressor when the AC power
fails at the operator.
If this AC power failure occurs, the solenoid brake will be disen-
gaged regardless of the DC2000's battery power . The gate can
be manually pushed opened at any time as long as there is NO AC
power at the operator.
(See above and Fire/Police Key Access Addendum Page 5)
Contact your local municipalities for more information
on correct emergency vehicle access operator installa-
tion and procedures.
Solenoid Brake Description
Connected to
120 Vac Only
NO
DC2000 Backup Brake Power
(See Important below)
WARNING
IMPORTANT
Addendum Page 4
Solenoid Brake Engaged
• Gate in closed position with normal AC power.
• Stop/Reset button has been pressed twice.
SL3000ULDCE™