Siemens RL-854 Introduction contd Options, Radio Controller Power Handling Capability, Heater

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

Introduction (contd.)

Options

The Radio Control has three output relays operated by keying the transmitter in specific sequences. To power these relays, pilots can set their communications transmitters to the frequency to which the RL-854 is tuned.

Three clicks of the mike button within five seconds powers the lighting system on the low brightness setting. Five clicks of the mike button within five seconds powers the lighting system on the medium brightness setting. Seven clicks of the mike button within five seconds powers the lighting system on the high brightness setting. The RL-854 Radio Control can be field programmed for three, five, and seven clicks to change the light settings.

The contacts of the relays in the RL-854 are for control purposes only. They are rated 10 amps (inductive) and are capable of operating the coils or power relays. They are not intended to switch lighting-load currents.

Two options are available for the RL-854 Radio Control Unit: radio controller power handling capability and heater.

Radio Controller Power Handling Capability

An option is available to provide for power handling capability in the Radio Controller, changing the designation to RL-854PR. It adds three 2-pole relays with contact ratings of 25 amps per pole. These power relays are powered by the control relays. Contacts of the power relays are terminated in a terminal block.

The entire Radio Controller is completely solid state and has no moving parts other than the relays.

Heater

A heater is available as an option for the RL-854 Radio Control Unit. Thermostat TH1 in the unit is used to supply the heater with 120 Vac when the outside air temperature drops below 0 °F. This prevents the receiver PCB from freezing.

 2001 Siemens Airfield Solutions, Incorporated	96A0027L	Page 6
All rights reserved	Issued 5/01