Siemens SITRANS FUH1010PVDX, Operating Instructions Manual, Page: 165 / 308

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CQO:1010PVXFM-3 Section 5
5.9.2 RELAY SETUP
Use this menu to assign a function to channel relays. The FUH1010PVX supports 2 types of relay out-
puts: Alarm Relay and Pulse Relay. Alarm Relay outputs operate in “fail-safe” mode. The relay(s) are
energized under normal conditions - an alarm condition causes the relay(s) to de-energize until alarm
clears. The Pulse Relay output supports totalizer and batch relay functions. The output pulse width is
approximately 200 ms; maximum activation rate is 2.5 pulses per second. If totalizer pulses exceed this
rate, excess pulses are stored in overflow register. This allows the relay to “catch up” when flow de-
creases enough.
NOTE: Using the <F1> key Totalizer clear command also clears all channel totalizers plus the
overflow register described in the last paragraph. The Reset Totalizer [Yes/No] menu
command will also accomplish this.
Assigning Relay 1 Functions
The FUH1010PVX provides one alarm relay. Please refer to the appropriate Installation Drawing in Ap-
pendix B for wiring details. Relays respond to any of the alarm conditions/data functions included on the
[Relay 1] option list.
Not Used Not Active
Power Off Power Off alarm occurs when power fails
S High LiquIdent High LiquIdent value relay trip-point.
S Low LiquIdent Low LiquIdent value relay trip-point.
S High Viscosity High liquid Viscosity value relay trip-point.
S Low Viscosity Low liquid Viscosity value relay trip-point.
S Hi Temperature High temperature value relay trip-point.
S Low Temperature Low temperature value relay trip-point.
S High Flow High Flow trip-point exceeded.
S Low Flow Low Flow trip-point exceeded.
S Flow Alarm System flow rate exceeds or falls below low flow setpoints.
S Fault Alarm System loses receive signal (all paths in fault).
S Spacing Transducer spacing needs adjusting.
S Empty Empty pipe alarm.
S Aeration % Aeration percentage alarm trip-point exceeded.
S Interface Interface setpoint exceeded.
S Reverse Flow Flow is in negative direction.
S BatchTot Batch/Sample total advances.
S Pos Total Positive total volume advances 1 digit.
S Neg Total Negative total volume advances 1 digit.
S Fltwarn System fault warning.
S Soft Fault Fault condition - memory mode active.
S Pig Detect Pig detection value relay trip-point exceeded.
Relay Option List