Attachment 1: Specifications - Metropolitan Washington Airports ...

DCA TERMINAL A IMPROVEMENTS (NEAR TERM)10 AUGUST 2012
TASK ORDER 03: LOBBY IMPROVEMENTS – PKG 4 -CURBSIDE CHECK-IN
RONALD REAGAN WASHINGTON NATIONAL AIRPORT
PROJECT DT1203
with VFD. Disconnects and assembly shall be lockable, UL listed, and comply with NEC or
Local Code requirements, whichever are more stringent. Type shall be General Electric,
Schneider Electric, Allen-Bradley, or as acceptable to The Authority. Mount motor disconnect
switch adjacent to motor. Label disconnect switch with black phenolic, white incised 3/4”
letters.
G. Tachometers: The high resolution encoder shall be low-level (24 VDC) and interface to the
PLC through low-level input modules. Type shall be Photocraft, RS-P64AJ programmable
cube encoder or as acceptable to The Authority.
H. Variable Frequency Drives (VFD): VFDs shall accelerate and decelerate conveyor speed in a
S-Curve. A minimum service factor of 1.5 shall be provided. Actual service factor shall be
determined by the Contractor for the specific requirements of the conveyor section being driven.
Variable Frequency Drives shall be SEW Eurodrive MOVIMOT with quick disconnects and
external brake resistor, Allen-Bradley PowerFlex 40 with external brake resistor, or as
acceptable to The Authority. Drive shall be coordinated with the motor for the specific
application. Allen-Bradley PowerFlex 40 shall be housed in a NEMA rated panel with heat sink
on the side of the conveyor near the motor.
I. Photoelectric Sensors:
1. All photo cells used for jam detection, overheight bag detection, etc., shall be
Allen-Bradley Photoswitch Series 9000 Polarized Retroreflective, Solid State Isolated
N.O. output type or as acceptable to The Authority.
2. Photosensors shall be mounted on structural members attached to the machinery structure
so that minimal vibration is transmitted to these units. No more than two penetrations per
sensor (one each for the photosensor and the reflector) shall be allowed in conveyor
sideguards; each penetration shall not exceed 1-1/2” in diameter and shall be beveled to
remove sharp edges.
J. Pushbutton Stations:
1. Pushbutton Stations: Pushbutton control stations shall be Allen Bradley Type 800T
switches, indicators and pushbuttons or as acceptable to The Authority. All pushbutton
stations in public view shall be flush-mounted with stainless steel cover plates. All
pushbutton stations in non-public view shall be painted with OSHA safety yellow.
Adequate maintenance access is required at all control stations.
2. Keyswitch shall be Best Access Systems, W-Series, electric switch lock or as acceptable
to The Authority.
3. All pushbutton switches with padlocking attachment used for E-STOP applications shall
be of the maintained-contact, push-to-stop, illuminated red LED mushroom-head type.
Other pushbutton switches shall be momentary-contact type. START or
START/RESTART pushbuttons at the load conveyors shall be green, illuminated, LED,
extended-head with guard type; START or START/RESTART pushbuttons at other areas
shall be green, non-illuminated, flush-head type. Normal stop buttons (where used) shall
be red, non-illuminated, flush-head type. JAM RESET pushbuttons shall be amber,
illuminated, LED, extended-head with guard type. OVER HEIGHT RESET pushbuttons
shall be white, illuminated, LED, extended-head with guard type. LAMP TEST
pushbuttons shall be black, non-illuminated, flush-head type. ALARM SILENCE
pushbuttons shall be yellow, non-illuminated, flush-head type.
BAGGAGE HANDLING EQUIPMENT 34 77 16 - 50