Data Flow Systems TCU800, Installation And Operation Manual

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S e t u p
Digital Monitor Point Inputs
The TCU has 18 digital monitor point inputs. These monitor points require an input and a return. All digital inputs support
10-30VAC/DC or 30-300VAC with external resistors. Note that the auxiliary input (P2-12) supports pulse input capture
instead of VAC. These inputs are organized into groups, or “banks,” that are electrically isolated from one another and
equipped with chip scale transformers that protect up to 3.7kVrms.
Bank 1 Bank 2 Bank 3
MTR 1 RUN P2-1 LOW LVL P2-6 MTR 1 SEAL P3-20
MTR 2 RUN P2-2 OFF LVL P2-7 MTR 2 SEAL P3-19
MTR 3 RUN P2-3 LEAD LVL P2-8 MTR 3 SEAL P3-18
EXT PM P2-4 LAG1 LVL P2-9 MTR 1 THERM P3-17
INPUT COM 1 P2-5 LAG2 LVL P2-10 MTR 2 THERM P3-16
HIGH LVL P2-11 MTR 3 THERM P3-15
AUX IN P2-12 INPUT COM 3 P3-14
ALM SIL P2-13
IN COM 2 P2-14
*MTR RUN (Motor Run) inputs are used to detect if a particular pump is running.
*EXT PM (External Phase Monitor) is an input for an external phase monitor alarm.
*LVL inputs are used as markers to determine the current level of the well. Using information from these inputs, pump control logic decides if pumps
need to be turned on or off.
*MTR SEAL (Motor Seal) inputs must be connected to a seal sensor. This detects the presence of water inside the pump housing which typically leaks
past the shaft seal. The sensor will activate if a leak in the seal is detected.
*MTR THERM (Motor Thermal Overload) inputs must be connected to a thermal sensor. The sensor will activate if the internal temperature of a pump
gets too high.
*ALM SIL (Alarm Silence) is an input that allows an activated alarm to be silenced from a source other than the soft-touch button on the overlay.
*AUX INPUT can be used for general-purpose inputs (e.g. pulse meters or rain gauges).
Bias Voltage Source Options
Internally-Supplied Bias Voltage Source
A voltage of 10-30 VAC or VDC will bias the digital monitor inputs in the ON state. Any voltage less than 4 VAC or 4
VDC will force the digital monitor inputs to the OFF state. The internal bias source is the ISO+24V terminal (P2-16) and
the ISOGND terminal (P2-15).
Biasing an Input with ISO+24V / ISOGUND Voltage