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Trip Alarms

Process alarm outputs

The Tracker 322 features two-alarm relays as standard and all other models can have a T340 logic expansion module fitted to give 4 relay or TTL outputs. The 4 process alarms can be configured to have a High, Low or Deviation (Band) Action. To stop fleeting alarms, separate on and off hysteresis and on and off delay timers are available, where the alarm must in (or out of) the alarm state continuously for a preset time period before the output operates.

Other features include alarm blocking (stops alarms operating at plant start up) and Latching (unlatch via logic input on a T340 module or communications). Alarm outputs are individually configured to be energised, or de-energised, in the alarm condition.

The modules can be supplied as 110 / 230VAC or 24VDC / AC powered. Configuration is via the front panel USB Port or the RS485 interface. Both ports can be used simultaneously. The configuration software is free and is available in the download section on this website.

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Data Acquisition (via serial link)
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PID Control





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10/24VDC Transducer Excitation for PID controller
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Signal Conditioning with Analogue output
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Alarm Trips



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110/240 VAC Option (Normally 24VDC Powered)
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