MTRA-FSP Installation & Operation Manual
Page 12 of 16
00242600-MTRA-FSP_Manual.doc
6
Alarms
The MTRA-FSP has the following alarm inputs:
6.1 Level Alarms (AL Probe)
A conductive level sensor is connected to the AL Probe input to detect when the
liquid level has risen above or below an acceptable level.
•
In Empty (Discharge) mode this will be a high level alarm and will
activate when the AL Probe input detects liquid and the activation
delay has expired.
•
In Fill (Charge) mode this will be a low level alarm and will activate
when the AL Probe input is no longer detecting level (ie: the level has
dropped below the sensor) and the activation delay has expired.
When a level alarm is detected the Alarm contacts are activated and the Level
Alarm LED flashes. The Alarm contacts can be used to operate an alarm device
such as a light or siren.
The alarm output can be set to Normally Open (NO) or Normally Closed (NC)
using DIP Switch 6:
•
NC alarm output (DIP Switch OFF)
•
NO alarm output (DIP Switch ON)
The alarm output can be configured to toggle (to flash an alarm light for
example). This is set using DIP Switch 4:
•
Constant alarm output (DIP Switch OFF)
•
Flashing alarm output (DIP Switch ON)
6.2 Pump Alarms
There are two types of pump alarms supported by the MTRA-FSP – Thermal
and Seal.
6.2.1
Thermal Alarm Input
A pump thermal sensor can be wired into the Thermal input. This is used to
detect when the pump is overheating due to a blockage or other fault.
When a thermal alarm is detected the Thermal output contacts are activated
and the Thermal Fault LED flashes. The thermal alarm will also turn off the
pump if it is running. The pump will not be able to be switched on again until the
thermal alarm condition is cleared.
