Technical Data
Page 3 Effective: July 2003
PRC100 - Universal System Controller
& Enclosures
TD01412013E
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USC Inputs and Outputs
Each USC is complete with two termination
strips located in the lower right of the device
(See Figure 2). These terminations provide
the ability to bring in two-wire digital or analog
inputs and analog outputs to devices such as
dimming electronic ballasts (See
Technical
Document TD1412019E
).
USC Input & Output Specifications
Each USC is equipped with the following:
•
Eight Universal Inputs (Digital or Analog)
•
Four Digital Inputs
•
Three Analog Outputs
•
One +15V dc Source
•
Four Electrically Interconnected Common
Terminations
When connecting digital inputs to the USC
there are two conditions that must be met.
First the input
must be a dry contact
. The
USC provides the proper wetting voltage to
detect a change of state in the contact.
Second, the input can be a
maximum of
500-feet
away from the USC using 18 AWG
stranded wire. It is also recommended that
only two wire inputs be used. The USC can
be configured, through software, to accept
both momentary or maintained type inputs.
When using the analog outputs, particularly
for dimming ballasts, the maximum distance
is 1000-feet from the USC to the furthest
device. For more information on control of
dimming ballasts see
Technical Document
TD1412019E)
.
Integrated Timing/Scheduling Features
Each USC is equipped with a microprocessor
and on-board memory. Because of this
several timing and scheduling function are
integrated into the USC. Each USC has the
following timing and scheduling features:
•
250 Individual Schedules
•
16 Holiday Dates
•
365 Day Time Function
•
Astronomical Function
•
Day Light Savings Function
•
Standard Operation On 12 Hour
Schedule, With Optional 24 Hour (Military)
Schedule Programming
When multiple USC’s are networked together
it is common practice to use a master clock
function in order to assure coordination of all
USC’s on a network. The master clock is
found on the Network Access Device. For
further information on Network Access
Devices see
Technical Data TD01412014E
.
Grouping Devices
Each USC has the ability to assign devices
under its control into groups, and is capable
of storing assignment data of up to
16
groups. Creating groups benefits the user
and system in two ways.
1. When creating a schedule that effects
multiple Smart Breakers or relays it is
much simpler to group all of those devices
and create a schedule for that group.
2. Because there is a limit to the number of
control commands and schedules that a
USC can create, it makes more efficient
use of the available control commands
and schedules to reference a group as
opposed to many individual Smart
Breakers or relays.
Control Command Functions
The USC is capable of locally storing up to 25
control commands. Control commands in a
Pow-R-Command 100 network are basically
instructions sent to and from controllers.
Each control command is targeted at specific
controller(s) and/or specific devices or groups
controlled by the targeted controller. In basic
terms, the control command is a logic
function. If a certain action takes place, such
as an input being switched on, a command is
sent out to targeted devices informing the
receiving devices of the actions it is to take. A
control command can be compounded to the
effect that if an action is taken, multiple
control commands can be sent out.
The control commands enable every input
wired to a controller on the network to be in
effect wired to every node on the network. In
control, control commands can take on the
form of a global command that will affect all
nodes.
Common
Analog Output 1
Analog Output 2
Analog Output 3
+15V dc Source
Digital Input 4
Digital Input 3
Common
Digital Input 2
Digital Input 1
Universal Input 8
Universal Input 7
Common
Universal Input 6
Universal Input 5
Universal Input 4
Universal Input 3
Common
Universal Input 2
Universal Input 1
Figure 1: Universal System Controller
TB1TB2
TB1 TB2
