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VI.
LAYOUT & I/O CONFIGURATION
Outputs
(Note
-
each output
’
s left terminal has been connected to the 24VDC power. The output
’
s right terminal provides the output sig-
nal)
Output #1
controls the Flush valve.
Output #2
is not assigned.
Output #3
is a relay output for the Alarm Light/Sounder
-
DP Alarm is flashing and Consecutive Flush Alarm is steady.
Output #4
Consecutive Flush Alarm signal
-
relay output turned on when the Consecutive Flush count reaches the setpoint. This
output is wired to the coil of Relay 1 (see above) to provide a Dry Contact output.
Inputs
I1
-
The optional Customer Initiate Flush input will signal the PDA/ATF
-
MAX to start a Flush cycle.
IB
-
The optional Customer Remote Alarm Reset input will signal the PDA/ATF
-
MAX to remotely reset the Consecutive Flush Alarm.
The Analog/Digital Input locations allow Miller
-
Leaman Inc. to design customer specific programs. These programs are then able to
receive and process both digital and analog signals from devices such as Pressure Transducers, Flow
-
meters, Level Switches, etc.
Inputs IC & ID are the Inlet and Outlet Pressure Transducer connections. These provide a 0
-
10Vdc signal into the controller. These
signals are converted into pressure level values and compared to each other for the pressure differential value. When the PD value
exceeds the PD setpoint, the PDA/ATF
-
MAX is signaled to start a Flush cycle. The Inlet Pressure Transducer also is used to disable
the Flush Timer and Flush Signal from Differential Pressure, should the Inlet Pressure be less than the Inlet Low Pressure Set
-
point.
Menu
Screen
Keypad
Audible / Visual
Alarm
