Xylem IM244R04 SPD Plus Variable Speed Pump Control - Manual (Page 18)

18
SECTION 7: CONTROL INPUT AND
OUTPUT FUNCTIONS
The control terminals allow for a variety of control
functions. Some of the terminals are prewired by the
factory. Removing prewired connections can disable
some controller functions. Refer to the information
below before removing prewired connections.
Turn off all power to the controller
before wiring devices to the control
terminals.
All the DI inputs are switch inputs. Do
not connect external power to these
inputs or damage to the controller will result. Only
connect non-powered switch contacts to these inputs.
START/STOP (DI1,13): The DI1 input allows the pump/
motor to be turned on and off by an external switch
while in REM mode. The input is pre-wired to +24V
terminal 10.
For external control of this input, use only a non-
powered external switch. Connect the contacts of the
switch to terminals 10 (+24VDC Supply) and 13 (DI1-
START/STOP). When the switch is closed the controller
is in START mode (output to motor is enabled). When
the switch is open the controller is in STOP mode
(output to motor is disabled).
TRANSDUCER INPUT (AI2, 5) and +24VDC (10):
These terminals are the transducer feedback and
transducer power supply. The controller is configured
with a 300 PSI 4-20mA output pressure transducer.
Connect the 3-wire pressure transducer cable with
white wire of signal to terminal AI2/5, brown wire
of +24 VDC transducer power supply to the drive
terminal 10, and shield/drain wire to terminal 1/SCR.
Refer to Section 4 for pressure transducer installation
details.
RELAY OUTPUTS (RO1-R03, 19-27): Relay outputs
RO1 through RO3 (terminals 19 to 27) are used to
perform motor control and fault functions inside the
controller. These functions are described below.
Start Ramp: Submersible motors require a start
ramp function that ramps from 0Hz (stopped)
to 30Hz in 1 second. DI3/15 ACC/DEC SEL and
RO1/19-21 Ramp Select are used to implement this
function.
WARNING
Disabling the Start Ramp function by removing the
prewired connections can result in damage to the
submersible motor and will void the motor and
controller warranty.
No Water Restart Time: The No Water Restart Time
is used to automatically restart the controller after a
No Water/Loss of Prime (dry well) Fault is detected.
This function is implemented using DI2/14 Fault
Reset, RO2/22-24 Fault Output and RO3/25-27
Under Load Output.
WARNING
Disabling the No Water Restart Time function by
removing the prewired connections will prevent
the controller from automatically restarting after a
No Water/Loss of Prime Fault is detected.
ANALOG OUTPUTS (AO1, 7 and AO2, 8): These
terminals provide 0-20mA output signals that can be
used to control auxiliary equipment. These outputs
are configured in the application software. Analog
Output 1 (AO1/7) is preconfigured to output a
0-20mA signal based on the output frequency of the
controller. Where 0Hz corresponds to 0mA and 60Hz
corresponds to 20mA. Analog Output 2 (AO2/8)
is preconfigured to output a 0-20mA signal based
on the output current of the controller. Where 0A
corresponds to 0mA and 100% of controller rated
output current corresponds to 20mA. The external
device used with the Analog Outputs must have an
impedance less than 500Ω.
RELAY OUTPUTS (RO4-RO6, 1-9): The relay outputs
RO4-RO6 have been configured for Ready, Running
and Fault functions respectively. The operation of
relay outputs RO4-RO6 is described below.
Controller Ready Relay (RO4, 1-3): This relay output
is configured to energize when the controller is
ready to function. The controller is ready when no
faults exist and the input supply voltage is within
range.
Run Relay (RO5, 4-6): This relay output is
configured to energize when the controller is
running the motor. The relay is de-energized when
the controller stops the motor.
Fault Relay (RO6, 7-9): This relay output is
configured to energize when the controller is
faulted. The relay is de-energized when there is no
system fault or after a fault clears.
WARNING
WARNING