Rectangular Rapid Flashing Beacon (RRFB) Warning System Specifications

For One and Two Sided, Dimmable and Non-dimmable, AC Powered Warning Systems

The main components of RRFB Warning System include Static Signage, RRFB assemblies, Control Cabinets, and Pedestrian Activated Push Button. Housed within each Control Cabinet are the Flash Control Circuit, AC Power Supply, and Wireless Transceiver.

1.  Static Signage

  1. Crossing signs shall be W11-2, S1-1, or W11-15 per MUTCD. W16-7P crossing plaques shall also accompany the crossing signs
  2. Pedestrian pushbutton instruction 9" x 12" R10-25 signs shall be furnished to be mounted adjacent to or integral with each pedestrian push button
  3. Shall utilize aluminum with a minimum of .080” thickness for the sign blank
  4. Shall have a sign face that consists of 3MTM Diamond GradeTM DG3 reflective sheeting applied to the sign blank with a 3MTM 1160 Premium Protective Overlay film to provide an additional layer of graffiti protection
  5. Shall have two holes for mounting to a post or pole. Optional vandal-resistant fasteners to mount the sign assembly shall be made available

2.  Rectangular Rapid Flashing Beacon (RRFB) Assembly

The RRFB Assembly shall conform to all applicable MUTCD standards and guidelines, and shall exceed the minimum requirements specified in FHWA Memorandum IA-11, Interim Approval for Optional Use of Rectangular Rapid Flashing Beacons.

  1. Each RRFB Assembly shall:
  2. House two rapidly and alternately flashing rectangular yellow LED array vehicle indications and one side facing pedestrian indication. The LED arrays shall be designed, located and operated in accordance with the detailed requirements as specified on the plans
  3. Active vehicle indications shall be visible at distances over 1000 feet during the day and over 1 mile at night
  4. When activated, shall function according to MUTCD standards for RRFB operation and brightness
  5. Have a housing that shall be constructed of durable, corrosion-resistant powder-coated aluminum with stainless steel fasteners
  6. Have enclosed components that are modular in design whereby any component can be easily replaced without having to uninstall the RRFB assembly
  7. Include mounting hardware for either single or back-to-back pole mounting and shall be universal to the pole type
  8. Have two vehicle RRFB indications that is approximately 7” wide x 2.8” high, each with 8 yellow LEDs in its array
  9. Have one pedestrian RRFB indication that is approximately 0.5” wide by 1.7” high so it is directed towards, and visible to pedestrians in the crosswalk. RRFB assemblies that are utilized for advance warning do not require the pedestrian indicator
  10. Have overall dimensions of approximately 23.6” wide x 3.8” high x 1.4” deep

3.  Flash Control Circuit

  1. Shall include integrated constant current LED drivers with a minimum of two-channel output for driving one or two LED beacon assemblies
  2. Shall have multiple programmable function options:

o Run from Dusk to Dawn

o Run Daytime only

o Run 24 hours per day, 7 days per week

o Run for a programmable time period when activated via switch, button contact closure or when triggered from an external sensor such as a wireless transmitter, radar, presence detector, wireless walk through bollard or loop detector with a compatible sensor output

  1. Shall have the ability to flash two independent outputs at a rate of between 50 to 60 flashes per minute with a 100 – 500 millisecond duration on-time. Each output shall reach the full output current as programmed for the duration of the pulse
  2. Shall include an integrated Real Time Clock with on-board battery backup
  3. Shall have the capability of RS232 communications for programming with Windows-based software
  4. Shall have the capability of being programmed to operate the RRFB Assemblies to run at full brightness always or to have multiple dimming levels in low ambient light conditions
  5. Shall have the capability to seamlessly integrate with a 900 Mhz FHSS wireless transceiver to form a network of connected devices

4.  AC Power Supply

  1. Shall accept a universal AC input, full range, 50/60 hz
  2. Shall have a 12VDC output, regulated to +/- 1%
  3. Shall have short circuit, overload and overvoltage protection
  4. Shall be convection cooled, DIN rail mount
  5. Shall have an LED power indicator
  6. Shall be UL60950-1, TUV EN60950-1, Class I, Div. 2 Group A,B,
    C,D and Hazardous Locations T4 Approved
  7. Shall operate in an environment with a relative humidity range of 20 to 90% non-condensing
  8. Shall operate from -20° to +70°C

5.  Control Cabinet

  1. Shall be NEMA 3R type
  2. Shall be 15" high x 12.5" wide x 10" deep
  3. Shall be constructed of .080" thick aluminum, with stainless steel or aluminum hardware and fasteners
  4. Shall have a #2 Corbin lock on the hinged cabinet door (key included)
  5. Shall include pole mounting hardware

6.  Wireless Transceiver

Used to seamlessly integrate multiple RRFB Systems wirelessly for simultaneous activation and synchronization within a warning system.

a.  Shall operate on the license free 900 MHz ISM band

b.  Shall have a line of sight communication range of 1000 feet

c.  Shall seamlessly integrate with any of the system flash controllers to ensure synchronous activation of other system components with wireless transceivers

d.  To ensure all integral indications consistently flash in unison, the Radio shall synchronize the flash controllers to activate the indications within 120msec of one other and remain synchronized throughout the duration of the flashing cycle

e.  Shall include two LED indicators for status and troubleshooting

f.  Shall be capable of being programmed to operate as a Parent (Gateway) or Child (Node or Repeater)

g.  Radio system shall allow for entire system programming of flash duration from a single radio location

h.  Shall operate from 3.3 to 15VDC

7.  Pedestrian Activated Push Button

The most common method of activating an RRFB Warning System is via a Pedestrian Activated Push Button. Additional activation methods are also available.

a.  The Push Button shall be capable of continuous operation within a temperature range of -30º to 165ºF (-34º to 74ºC).

b.  The Push Button shall be ADA compliant, and shall operate as a normally open (n/o) circuit

c.  Shall Be Polara Bulldog Model Series 3