Overview
The NB-4120-1
Double Belt, Bi-Parting Sliding Door Operator
is designed and tested for
lead shielding doors weighing up to 70,000 lbs (total both doors) operating at linear speeds of
6.0 in/sec maximum (each leaf in opposite directions) or a maximum horizontal operating force
of up 1400 lbs (total both doors).
The NB-4120-2 Single Belt, Bi-Parting Sliding Door Operator
is designed and tested for
lead shielding doors weighing up to 35,000 lbs (total both doors) operating at linear speeds of
6.0 in/sec maximum (each leaf in opposite directions) or a maximum horizontal operating force
of up 700 lbs (total both doors).
This is accomplished with a belt drive system comprised of a 2” wide H polyurethane steel
reinforced timing belt coupled to a 2hp AC, high torque, in-line helical gear motor.
Applications involving heavier doors at slower speeds/acceleration rates should be referred to
the Engineering Department.
The NB-4120
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 clamps
directly to the top of the door carriage or 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
will provide many years of maintenance free service.
This power open/power close electro-mechanical operator with its state of the art
components, make it the strongest, most reliable and easiest to install in the industry
today. Refer to the
Wiring Legend for Terminal Strip Hookup
for all open, close, stop
and
External Safety Device
inputs, which are all Class (2) 24VDC normally open
momentary contact
(except the stop input, terminal #10, which is a normally closed
input).
Power supply hookups for both Class (2) 24VDC, and 230VAC,3 phase are also
indicated. The PLC then processes all this information, in addition to many other
features for proper control of these heavy lead or concrete doors. This door operator is
patented under
US Patent No. 6,177,771 B1
.
The
NB-4155 Commercial/Industrial Sliding Door
is compliant with
UL 325 Section
30.2 External Entrapment Protection
(Fail Safe/Self-Monitoring)
providing all
External Safety Devises are wired and installed per this manual.
Logic Control:
This Operator offers the latest technology in PLC (Programmable Logic Control). The
following (3) modules snap to a DIN rail base:
CPU (Central Processing Unit)
- processes and stores data in its internal register such
as door position presets, inputs from pushbutton stations and outputs to motor controls.
This extremely compact unit houses (8) LED 24 VDC inputs and (6) LED outputs with
(3) isolated commons.
Analog/Digital Converter
- converts the analog signal of the Rotary Position
Transducer to a digital value.
