Data Flow Systems TCU800, Installation And Operation Manual

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U n i t O v e r v i e w
of the TCU800’s alarm system. The input is normally held high with no phase voltage fault. When an alarming
condition occurs on the external monitoring system, bringing the input low will cause an alarm on the TCU800.
Digital Output Control
The TCU800 controls digital outputs via two methods: solid-state relays and mechanical relays. The purpose of these
outputs is to provide pump start, auxiliary output, alarm light, and alarm horn control.
Solid State Relays
There are four solid-state relay outputs used to control the three pump starter signals and one auxiliary output.
Pump Starters
The three pump start signals are independently powered via externally supplied Starter Power. The output control is
provided automatically or can be overridden using the HOA switches. See chapter 6 for HOA control.
Auxiliary Output
The auxiliary output is independently powered via auxiliary output power. There are several configuration options available
for its operation. See chapter 6: “Operating Procedures” for more information on configuration options.
P1-16 ALM_HORN Load side of alarm horn relay (NO)
P1-17 ALM_LITE Load side of alarm light relay (NC)
P1-18 ALM_PWR Line side of alarm relays
P1-19 AUX_OUT Load side of auxiliary relay
P1-20 AUX_PWR Load side of auxiliary relay
P1-21 MTR3_STR Load side of motor starter 3 relay
P1-22 MTR2_STR Load side of motor starter 2 relay
P1-23 MTR1_STR Load side of motor starter 1 relay
P1-24 STRT_PWR Line side of motor start relays
Analog Input Monitoring
The TCU800 monitors four analog inputs. These inputs can be used for different sensing devices such as level, pressure,
or flow. These inputs support 4-20mA, 0-5VDC, or 0-10VDC devices.
Level Sensing
Two analog inputs are used as normal and optional backup transducers. The transducers must be configured for the type
of input and well level correlation. See chapter 6: “Operating Procedures” for more information on configuration options.
Auxiliary Analog Inputs
Two additional analog inputs are not used in the default pump control operation but can be configured for monitoring via
telemetry. Contact DFS for custom control program options.