General Information
Doorlec’s model TCBOD barrier has a synchronized double linkage drive assembly and is engineered to withstand the abuse of continuous operation.
Thermostatically controlled 500 watts heater ensures normal temperature in the cabinet during extreme weather conditions, preventing freezing of oil in the speed reducer and eliminating humidity on electrical components.
Will accept, when specified, any optional equipment for fully automatic operation. (See catalogue # E113).
Barrier Housing
Constructed of 10 ga. C.R. steel, welded together with all seams ground smooth. Two lockable access-doors are located on side opposite to traffic for easy maintenance and service. Top cover of housing is also removable to facilitate adjustment to limit-switches and drive mechanism. Access doors are gasketed and designed to meet EEMAC 4 classification. Totally waterproof assembly. Barrier housing is primed with rust-proof primer and spray-painted in gold-tan baked enamel.
Three-Button Station
Momentary-contact type for up, down, stop. Operator may be stopped in any position and barrier moved up or down from that position. Down button can be wired for constant pressure when specified. Control circuit: 24V. A.C. for user’s protection, class II.
Reversing Contactor
Heavy-duty type.
Reduction
Made by V-belts and pulleys for primary reduction. Worm-gear reducer, single-stage 60:1 ratio for secondary reduction to barrier drive-shaft. Barrier angular speed: 32o/second. Opens or closes in less than 3 seconds.
Limit Switches
Rotary-type cams, mounted on output drive shaft, activate the micro switches to cut power of motor in both up or down directions on their preset travel. Operating force on limit switches: 4 oz. (113.4g) maximum. Contact separation: .020″ (.05cm). terminations: 0.25″ (6.25cm) quick connect.
Motor
1/2 H.P. (373W) 120V. or 240V. single-phase with manual reset over-current or under-voltage protection.
Reduction
TCBOA operator utilizes two 4L V-belts, one 1-1/2″ (3.75cm) type A double cast-iron pulley and two 8″ (20.3cm) die cast aluminium-alloy pulleys, balanced for smooth operation as primary reduction. Secondary reduction is achieved by a 60:1 ratio single-stage worm-gear reducer, running in an oil bath. Cast-iron alloy housing. Hardened and ground steel worm and alloy bronze worm-gear for greater wear life. High-speed taper-roller bearings, double-lip, spring-loaded seals, to keep lubricant in and dirt out. 1″ (2.54cm) D. double-output shafting, hardened and ground for greater strength.
Double-Link Drive
Connecting bars and crank-shaft are synchronized for smooth action. Rotating on self-lubricated “oilite” bushings and high-speed cast-iron flanged bearings. Connecting bars and drive-shaft are made of solid cold rolled steel and are finished in black oxide to prevent corrosion. Mechanical action is such that brake or mechanical stops are not required.
Cabinet
Weatherproof seam-welded cabinet, constructed of 10 ga. C.R. steel with all seams ground smooth. Size: 14″ x 15″ x 46″ high (35.56cm x 38.1cm x 117cm). Two lockable access-doors are located on side opposite to traffic for easy maintenance and service. Top cover of housing is also removable to facilitate adjustment to limit-switches and drive mechanism. Access doors are gasketed and designed to meet EEMAC 4 classification. Totally weatherproof assembly. Two cylinder locks and four keys are provided. The cabinet is finished with two coats of red oxide primer and two coats of gold-tan scratch-retardant baked-enamel paint, to withstand environmental conditions.
Electrical Control Cabinet
Factory pre-wired, made of 14 ga. C.R. steel. Pre-formed size: 8″ x 16″ (20.3cm x 40.6cm). Mounted on unit chassis with four zinc-plated steel-bolts. Can be easily removed if required.
Motor Control
Heavy-duty reversing contactor, two sets of three-pole contacts on a common frame, mechanically interlocked to prevent simultaneous closure. Clapper-type armature with three-point suspension, auxiliary contacts SPDT or DPDT (as required) on each armature. Coils: 24V. A.C. Load contact amps: resistive: 15 amps @ 120V. A.C., 10 amps @ 240V. A.C., 5 amps @ 600V. A.C.; Inductive: 2 H.P. (1492W) max. Terminals: .25″ (.6cm) quick connect. Mechanical life: over 10 million cycles.
Transformer
25VA step-down transformer is provided, 120V., 240V. A.C. primary to 24V. A.C. secondary, class II. For control wiring distance over 50 ft., consult factory for proper VA of transformer or minimum control wire size.
Barrier Lifting Arm
The wish-bone style arm (as shown below) is made of clear wood such as white pine, 1″ x 6″ (2.54cm x 15.24cm), extending up to 12 ft. (3.66m) from the gate body. A single board of same size extends further to allow a total arm extension up to 18 ft. (5.49m). The whole assembly is held together with galvanized formed steel brackets and zinc plated bolts and fasteners. Arm assembly is counterbalanced at both sides with steel weights for smooth and effortless operation. All wood portions of the arms are painted with two coats of exterior black paint. Yellow warning stripes are applied diagonally to both sides of the gate arm for better visibility.
Warning Light Package (optional at extra cost)
Three red lights are installed on the rear portion of the barrier arm 4 ft. (1.22m) apart. The lights will flash continuously when barrier is in all but the vertical position whereupon they will shut-off. The lamp bulbs are 120V type and are suitable gasketed for weatherproof installation. The lights are interconnected by flexible conduit to the operator control panel.
Motor
1/2 H.P. (373W) rated for continuous duty. Instant-reverse type capacitor starting 120V. or 240V. single-phase, 1725 RPM. Permanently lubricated ball-bearings. Frame : rigid type 56. Shaft: 5/8″ (1.56cm) diameter.
Traffic-control barrier is pre-wired, colour-coded and tagged.
Wiring diagrams, installation manual are enclosed with each unit.
Operator is pre-run and tested before shipment.