Siemens RL-854 manual Theory of Operation, General

RL-854 Radio Control Unit
Type I, Style A	Description

Intensity Control (contd.)

REILS

Adapt the Radio Control of REILS to the equipment and the needs of the airport. For one- or two-setting REIL systems, turn off the REILS at the lower intensity and leave powered at the higher intensity.

Approach Lights and Edge Lights

When a runway has approach lights that are Radio Controlled and edge lights that are not, the edge lights are left on at an intensity level selected according to the anticipated weather conditions during the hours of night operation. If the runway lights are Radio Controlled and the approach lights are not, then the approach lights may be left off or at a pre-selected brightness. The approach lights should never be on while the runway lights are off. On runways where the approach lights and runway lights are both radio-controlled, the intensities of both systems are increased or decreased simultaneously by the Radio Control.

Photocell Control

Theory of Operation

When the intensity of the lighting system is automatically controlled by a photocell or other means, the Radio Control powers the system. The intensity is selected automatically by the photocell.

This subsection describes the RL-854 Radio Control unit theory of operation.

General

The RL-854 has three major components: the mother printed circuit board (PCB), the Receiver PCB, and the Decoder PCB.

Main Assembly

See Figure 2. Power is supplied to the motherboard via terminal block TB1. Fuse F1 protects and switch S1 switches the power to the primary power of transformer T1. T1 has two 120 V ac primary windings that are operated in parallel.

 2001 Siemens Airfield Solutions, Incorporated	96A0027L	Page 12
All rights reserved	Issued 5/01