brookfield industries, inc.
99 West Hillside Ave
Thomaston, CT 06787
T:
860.283.6211,
F:
860.283.6123
www.bfimfg.com
NB-4120-2-DC Sliding Door Operator
Description:
The NB-4120-2-DC, Single and Bi-Parting Sliding Door Operator,
is designed and tested for lead shielding doors
weighing up to
35,000 lbs
(single door)/
17,500 lbs
(each bi-parting door), operating at linear speeds of
6.0 in/sec
maximum (single door)/
12.0 in/sec
maximum (bi-parting doors), or a maximum horizontal operating force of
700 lbs
(single door) or
350 lbs
(each bi-parting door). The drive train features a 2” wide (H) pitch, polyurethane, steel
reinforced timing belt, coupled to a ¾ hp, 90VDC, helical-bevel (high torque) gear motor. Since the drivetrain features
a ¾ hp DC motor, this operator also includes a
Battery Backup System
and
Manual Operation
as a redundant
backup for power interruption.
Applications involving heavier doors at slower speeds/acceleration rates should be
referred to the Engineering Department.
The NB-4120-2-DC
is designed to be used in conjunction with an existing linear bearing/rail system capable of
supporting heavy doors with a low coefficient of friction or standard beam trolley supports for hanging the door.
The open ended style timing belt normally clamps to the side of the door carriage/attachment structure. Once
the timing belt has been properly aligned and pre-loaded, in addition to the motor control parameters being
correctly set, the
NB-4120-2-DC
will provide many years of maintenance free service.
The PLC (Programmable Logic Control) is programmed by the manufacturer to accept input signals from an
external (4) button station (including open, partial open, close and stop commands). Additional I/O
(input/output) are featured with the
NB-4120-2-DC
to accommodate inputs from infrared presence sensors and
pressure sensitive tape switches that will either stop or reverse the door to the open position, when activated
in the closing cycle. All input commands to the PLC are class 2, low voltage. There are no limit or proximity
switches to adjust or install. Simply adjust the door’s positioning presets as required by interfacing with the
PLC via a hand held Data Access Unit (purchased separately).
Rating a Sliding Door Operator:
The rating of a sliding door operator in any particular installation cannot be based solely on the weight of the
door. Other factors such as linear bearing alignment, coefficient of friction, and acceleration/deceleration rates
may have a substantial affect on the total axial force acting on the door operator components. We have
factored these variables into the
Rated Maximum Operating Forces
. This assures the customer they are
getting the most dependable product at a reasonable cost over the life expectancy of the operator.
Maximum Operating Force* =
700 lbs (3115 kg) (total)
Maximum Rated Linear Speed =
6.0 in/sec (15.24 cm/sec)
Maximum Door Weight =
35,000 lbs(15,890 kg) (total)
Minimum Rated Cycles =
500,000 openings and closings
Maximum Travel =
Unlimited
*The maximum horizontal force acting on the timing belt assembly in order to accelerate the mass of the door
to the maximum operating speed and to overcome friction and any misalignment.
Specification:
1)
Supply voltage:
/- 10% (230VAC for European service) 50/60 Hertz single phase. In-Line
circuit breakers supplied with motor control and PLC. Surge protection, line filters, and EMI ferrites shall
be included.
2)
Battery Backup (standard):
Opens the door during power interruption only. (2) 12VDC, 7.0 Ah battery
with float chargers and test switch shall be included along with an end of travel limit switch to disconnect
the motor.
3)
Current Consumption:
maximum 12 amperes
.
