Data Flow Systems TCU800, Installation And Operation Manual

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C h a p t e r 3
Operation
With a single finger, touch and release the screen over the desired option. Wait a moment for the operation to load and
complete.
Sleep and Wake
After 15 minutes of no activity, the screenwill sleep. While the screen appears black, the normal TCU800 operations are
continuing. The screen sleeps to improve product longevity. To wake the screen, tap the screen gently or press the home
button. The screen may take a few seconds to illuminate.
Monitoring and Control
The TCU800 is capable of monitoring and controlling various interfaces for input/output logical operation and
communication. It interacts with digital inputs, digital outputs, analog inputs, serial communication, phase voltages, and
various internal features. The discussion in this section is limited to the default operation of the TCU800; contact Data
Flow Systems to discuss alternative operations.
Digital Input Monitoring
The TCU800 can monitor digital input devices such as contact closures, float switches, pressure switches, pump seal
and thermal overload contacts designed for mechanical and solid state signal closures. These input devices are used to
determine various statuses of the pump control system or its auxiliary components to maintain proper operation.
Float Inputs : Level sensing is provided via float switches when configured. Six discrete inputs are provided as float level
inputs with a common ground. The digital ground is also common to the auxiliary input and alarm silence inputs.
Auxiliary Input
: The auxiliary input provides the ability to monitor an input and control an output (aux out) based on it’s
status, with several configurable options; see the auxiliary control configuration section. The digital ground is common
with the six discrete float and the alarm silence inputs. This input can also be used as a pulse counter.
Alarm Silence
: The alarm silence input provides a connection for an external momentary switch. Additionally, the home
button is provided to silence alarms.
Motor Run Status : There are three motor run status inputs, one for each pump. These provide the statuses from the pump
starter relays. This allows for pump start and stop fault determination; see the Pump Start and Stop Fault section for more
information.
External Phase Monitor : The external phase monitor input is provided as both an internal bypass and an alarm input. The
purpose of this input is to allow a system to use either the TCU800’s phase monitoring system or an external phase monitor
whose alarming condition is passed through the TCU800’s alarms.
Phase Monitor Bypass: The input is held in the on (high) state, this causes the internal phase voltage monitoring
to be bypassed - no alarms will occur by internal phase voltage faults.
External Phase Monitoring: An external phase monitoring device can provide an input to the TCU800 to make use