Specifications

Operations Manual, Redundant System Controllers 209351 REV B 59
5.0 Design Philosophy
The RCP series of redundant controllers was designed to achieve a new level in high
reliability, maintenance free operation. A tightly integrated modular assembly approach
has been used to realize an extremely versatile controller while maintaining its user
friendly operator interface. Five basic building blocks are combined in the RCP
redundant controller:
1. Redundant Power Supplies
2. Digital Core Board Assembly
3. I/O Board Assembly
4. Vacuum Fluorescent Display
5. Front Panel Mimic Display
5.0.1 Redundant Power Supplies
A block diagram of the controller is shown in Figure 5-1. Two power supplies are
provided in the controller. These supplies can be connected to two independent AC
sources for absolute system redundancy. Either supply is capable of operating the
controller and its associated transfer switches. Both power supplies have universal
input capability operating over an input voltage range of 85 to 265 VAC and line
frequencies of 47 to 63 Hz. The power supplies have a power factor of 0.93 ensuring
minimum line harmonic products. Each power supply produces +26 VDC.
The RCP2 provides three channel power outputs for connecting external LNA/LNB
units. In standard configuration, each LNA/LNB channel can be selected to supply 13V
or 17V with up to 900 mA DC current output. Output voltage is user-selectable either
from the front panel menu or over the remote control interface. The -HP model
provides an additional 26V 1500 mA output option for use with higher power external
equipment.
All channels are protected from overload and will reduce output if the maximum power
output capacity is exceeded by an external load.
Note for 26V 1500 mA channel output: In order to provide an equal
load to both internal AC/DC supplies, channels derive their power
asymmetrically: Channel 1 from PS2, Channel 3 from PS1; and Channel
2 from either PS2 or PS1. See Figure 5-1. This configuration allows
default standby Channel 2 to power up in case one of the AC/DC power
supplies fails. In order to conserve power from the remaining power
supply, the LNA/LNB channel will reduce its power output to 13V, 900
mA.
Section 5: Theory of Operation