What is sequential operation

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The 871-2 option board on PS873 power supply provides output voltage when an input such as card reader is activated. If 871-2 board is programmed for sequential operation when either input is activ...
RF sequential operation requires the use of of a minimum of 2 receivers (8310-865). Depending on the desired operation required (if using access control), it may require up to 4 receivers (8310-865...
Sequential (Control Boxes)
The 4630/4640 operator activation inputs are: Normal Activation Inputs (2 parallel) - terminals 16 & 17 or 18 & 19. Sequential Input - terminals 8 & 19. Alternate Action Input - terminals 15 &...
For devices shipped after 8-24-2015 with motor driven:  a.       0-200 ft, use  #18 gauge wire b.      0-500 ft, use #14 gauge wir...
For Product Shipped prior to 8-24-2015 with solenoid driven:          a.       0-100 ft, use #14 Gauge Wire      b.&n...
 Pneumatic Automatic Operators are used in areas where electrically operated devices are not convenient or permitted.  Consists of a modified, heavy-duty door closer for manual oper...