All information stored in non-volatile
memory.
PCU DETAILS
DataHopper™ Pump Commander Pump Control Unit
(PCU) Overview
INTRODUCTION
The Butler National Pump Commander Pump Control Unit
(PCU) is a Microcomputer based data collection subsystem.
The PCU can be used as a 'STAND-ALONE' or remote interface
when used with the Butler National DataHopper 10-4
Remote Terminal Unit.
The PCU is equipped with 8 closure sensing digital
inputs, 4 digital relay outputs, 1 analog 4-20 mA
Input, and a 24V power supply. These features allow
the PCU to run as simplex, duplex, or triplex pump
stations with a wide array of control devices. Full
user confrguration can be accomplished on the PCU
user interface or remotely when used in conjunction
with an RTU. User configuration includes wet well
set points, pump start intervals, flow values (wet
well volume), control type, number of pumps, calibration
values, emergency run time, pump hour meters. and
auxiliary digital input controls. All inputs and outputs,
(switched or analog voltage sensing) can report to
a central station via an RTU.
Our dependable one board design means no external
'plug in' assemblies or modules are required, as card-edge
type connectors have exposed metal surfaces which
are damaged in corrosive environments. All input and
output connections are made via plugin terminal strips
which are gold plated to help prevent corrosion. All
aspects of the PCU design lead to ease in setup, configuration,
and serviceability.
DIGITAL INPUTS
The PCU has eight (8) digital inputs. These inputs
sense contact closure and are powered by an on- board
isolated power supply. When using floats as the control
type, six (6) of the digital inputs are float inputs.
The remaining two digital inputs are auxiliary contact
closure inputs.
DI 1: Low level float
DI 2: Off level float
DI 3: Lead On float
DI 4; Lag On float
DI 5: Lag 2 On float
DI 6: High Level float
DI 7: Aux 1 input
DI 8: Aux 2 input
Note: lf a low level float input is not utilized,
the input must be jumpered
When other control types are used that do not utilize
the digital inputs for control, the aux. inputs 1
and 2 are the only inputs that can be utilized.
* Exception: When using an RTU, all inputs can be
used to export contact closure information through
the RTU to a monitoring site.
Auxiliary inputs 1 and 2 are configurable in the
PCU setup menu. These 2 inputs can both be set for:
OFF, RELAY OUTPUT, or EMERGENCY FLOAT. When using
the RELAY OUTPUT option, the input can close Digital
Output 4 upon any contact closure. The EMERGENCY FLOAT
option will automatically run all available pumps,
for a predetermined length of time, upon contact closure.
Each of the digital inputs are optically isolated
and transient protected.
DIGITAL (RELAY) OUTPUTS
The PCU has four (4) output relays. Three of the output
relays are used for moter/pump controls and the other
relay is used for all alarm Output conditions. Each
relay is configured normally open ond capable of switching
O to 280 volts AC or DC at 3 amps maximum load. A
status LED light gives a visual indicatlon of the
state of all relays.
The three motor / pump control relays are wired in
conjunction with 3 rotary HAND / OFF / AUT0 switches
These HOA switches are isolated from the PCU output
relay circuitry except for the AUTO position of the
HOA. This allows the user to operate a motor / pump
in the HAND position in the event of a PCU fail. In
normal operation, the output relays will function
when called for, disregarding the HOA positioning.
The PCU software alternates through each of the activated
output relays after every pumping cycle.
The alarm relay is activated when an alarm condition
exists. This alarm condition is determined by the
analog input wet well alarm settings, auxiliary input
1 and 2 setup, high level float input tripped, and
low level float input tripped. This relay is for use
with audio or visual alarm indicators.
ANALOG INPUT
The PCU has one (I) analog input provided along with
an onboard 24 volt power supply. The analog input
has the capability of monitoring a 4-20 mA transmitter
or transducer in 4096 steps or resolution. The analog
input is activated when using any CONTROL TYPE other
than FLOATS. A level indicating LED displays the analog
input value on the user interface. The analog input
is transient protected.
**SEE: Analog input Setup, for calibration of input
**
FLOW CALCULATION/REPORTS
The PCU is capable of monitoring incoming flow into
the well. The lead on and lead off set points are
used (BUBBLER - lead on / lead off, FLOATS - off float
/ lead on float) to calculate the flow. The flow can
be reported to a monitoring site via RTU. This infomation
can then be viewed or printed at the monitoring site.
POWER SUPPLY
The integral power supply provides +8 VDC, and +5
VDC as required by all system components. The power
supply has sufficient current capability to operate
alI system functions. Regulation devices are designed
to provide thermal and over-current shutdown. Surge
protection and fuses are supplied on the primary and
secondary sides of the power transformer. Input power
is 11OVAC with 220VAC available as a factory option.
In addition an onboard, isolated, 24 volt, sensor
loop supply is provided to power sensor inputs.
USER INTERFACE
The PCU user interface is used for all on-site user
configuration and information. Four (4) push button
switches and an LCD display make up the unit. Step-by-step
directions are provided on the LCD to allow ease in
scrolling through the setup and information menus.
**SEE: System Setup**
SPECIFICATIONS
| Power |
110VAC1220VAC (factory optional) |
| Digital inputs |
Closure sensing |
| Analog inputs |
4 to 20 mil current-loop
|
| Relay outputs |
0-280 VAC or DC, up to 3amps |
| Input/output protection |
M.O.V. Trasorb, and optical
isolation |
| Communications |
RS232 serial port and L2C to
RTU for two-way telemetry radio link.
Landline via dedicated modem |
| Temperature |
Range from -25 degrees centigrade
to +70 degrees |
| |
Standard NEMA 4 type |
