RL-854 Radio Control Unit | |
Type I, Style A | Description |
Interface Panel (contd.)
Automatic Radio Control
When the Radio Control unit is powered, 120 V ac is connected to relays
K1 and K2 through contact 7A, 5A, or 3A, powering K1 and K2.
Energizing K1 supplies power to the REILS.
If a 3-pulse relay is energized, CCI control voltage from the CCR is supplied through the normally open contact of relay K2 back to CC. CCI voltage is fed to the B10 input of the CCR through contact 3B and normally open contact of K2. This powers the CCR at the 10% brightness level.
If a 5-pulse relay is energized, the 3-pulse relay is de-energized and the 30% brightness level command voltage is supplied to the CCR via relay contact 5B and the normally open contacts of K2. Relay K2 remains energized via relay contact 5A.
If a 7-pulse relay is energized, the 5-pulse relay is de-energized and the 100% brightness level command voltage is supplied via relay contact 7B through the normally open contacts of K2 to the CCR. Relay K2 remains energized via relay contact 7A.
Manual Control
See Figure 3. In the manual position, K2 is de-energized and control voltage is supplied to the CCR through the normally closed contacts of K2.
If the CCR main rotary control switch is placed in the remote position, either 120 V ac or +48 V dc is output from the CCR at terminal CCI. The CCI voltage is input into the L-821 control panel at the terminal labeled CCI. This voltage is then switched via relay K1, whose coil is controlled by the photocell.
The photocell supplies 120 V ac to the coil of K1 during the daytime. When K1 is energized, the CCI control voltage is supplied through K1's contacts to the ON/OFF switch. If the switch is placed in the ON position, the CCR is automatically powered at the rotary-switch intensity-level setting. The rotary switch has three positions: 10, 30, and 100. If at any time the Radio Control is powered, operation of the CCR is automatically switched over to the RL-854 unit.
Several regulators can be operated together or separately from the same voltage through corresponding switches. In addition, other equipment can be controlled from the L-821 panel (for example, edge lights, VASI, or REILS) by using a toggle switch to control voltage to a contactor connected in line with each piece of equipment.
