Positioning the FR for Optimal Performance

FR55/FR200 RECEIVER INSTALLATION – DRAWING SUMMARY
(Schematic, not to scale. Includes an elevation, a plan view, Detail A for the roof-height mount, and general notes on detector sequencing.) Do not install FR on metal.

COMPONENTS
- FR55/FR200 receiver ("FR"): reads the on-board vehicle module by inductive coupling.
- SRF55 vehicle detector ("SRF"): overhead detector that senses vehicle presence. Mounting details are in drawing FJXAS008.
- JB20 RIH junction box: post-mounted at the side of the service lane. Conduit runs from it up the post and across an overhead frame. The SRF55 drops from a junction box on that frame above the lane, and the conduit continues down the far side to the FR.
- Vehicle module: on the bus at the upper curb-side corner of the windshield.

STANDARD FR MOUNT (ELEVATION AND PLAN VIEW)
- The FR hangs from the overhead frame beside the bus in its service position.
- Height: 9 ft above the floor of the service lane.
- Offset: 20 in back from the curb line.
- Along the lane: about 5 ft back from the front of the stopped vehicle.
- The SRF55 is overhead, above the bus in its service position.

ALTERNATE ROOF-HEIGHT FR MOUNT (DETAIL A)
- The FR can be mounted on an overhead drop pole, level with the roof of the bus.
- At that height, aim the FR at the vehicle module with two adjustments:
- TILT: about 30° downward, so the FR face points down toward the module.
- TWIST: about 30° around the drop pole, toward the module.
- Top View 1: when the FR is behind the module, twist it toward the FRONT of the vehicle.
- Top View 2: when the FR is near or slightly ahead of the vehicle front, twist it toward the REAR, back toward the module.
- Angles are approximate. Confirm the aim at installation.

DETECTOR SEQUENCING (GENERAL NOTES – APPLIES TO BOTH MOUNTS)
1. Locate the SRF55 ahead of (upstream of) the FR55/FR200 in the direction of vehicle travel.
2. The vehicle must pass under the SRF55, and presence must be detected, BEFORE the vehicle module enters the FR55/FR200 inductive (read) range.
3. Required sequence: (1) SRF55 detects the vehicle → (2) the module enters the FR inductive range → (3) the vehicle stops in service position.
4. The inductive range is centered on the FR. The FR may be located near the front of the vehicle. If needed, twist the FR to face back toward the module.

NOT SPECIFIED ON THE DRAWING (do not state values for these)
- The size or distance of the FR inductive range. It is shown only as an approximate outline.
- An exact bus roof height or roof-height mounting dimension.
- SRF55 mounting specifics beyond "overhead, upstream of the FR". Refer to drawing FJXAS008.

Not specified: length of bus