Morrison Bros. Model 918AC Tank Alarm System Interface w/ 3 Inputs & 2 Outputs

Morrison Bros.
6.00 LBS
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AC-powered console designed to monitor 1 to 4 simple input switch devices and provide both audible and visual indication when an input switch is activated. The 918AC has the optional capability to add 1 to 4 configurable relay outputs to interface with remote audible and visual indicators or other external simple switch-activated devices.


  • Intrinsically safe input modules expandable up to 4 input channels
  • Electromechanical output modules expandable up to 4 output relays
  • Audible alarm ON/OFF selectable by channel
  • Auto silence ON/OFF selectable by channel
  • Normal open (NO) or normal close (NC) selectable on input and output
  • Output relay activation selectable to one or more input channels
  • Fail safe mode selectable to indicate power outage at console
  • Change lens color: red (standard), amber, or green
  • Power Requirements: 100-240 VAC, +/-10%, 50/60 Hz
  • Input Sensors: simple switch devices
  • Output Relays: dry switch contact, form C SPDT, rated 5 AMPS at 240 VAC
  • Enclosure: NEMA 4X indoor/outdoor weather protected lockable box (non-hazardous location only)
  • Audible Horn: 95 dBA at 2 feet
  • Operating Temperature: -40°F to 140°F


  • UL/cUL 913 Listing for Ordinary Location with Hazardous Location Intrinsically Safe Input Circuits for Class 1, Div 1, Group D
  • Florida DEP EQ-834