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1771-VHSC
Allen Bradley PLC-5 Counter Module

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2 year warranty 2 year warranty*

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*Manufacturer's warranty does not apply

PLC-5 Counter Module
Description

A propos de ce produit

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The Allen Bradley 1771-VHSC is a high sped counter module for industrial applications. The 1771-VHSC  is also an intelligent block transfer I/O module that interfaces signals with any Allen-Bradley programmable controller that has block transfer capability. Block transfer programming moves module status data from the module’s memory to a designated area in the processor data table. It also moves configuration words from the processor data table to the module memory.

As it is a single slot module, the Allen Bradley 1771-VHSC module does not require an external power supply. However the outputs do require a power supply. After scanning the inputs and updating the outputs, the input data is converted to a specified data type in a digital format to be transferred to the processor’s data table on request. Command and configuration data is sent from the programmable controller data table to the module with a BTW instruction

The AB 1771-VHSC module counts pulses from encoders (such as Allen-Bradley Bulletin 845H, K, F, P, E and L), pulse generators or mechanical limit switches, proximity switches, etc. and returns either a count or frequency in binary or BCD format.

AB 1771-VHSC Key Features

 

  • 4 input channels configurable for encoder mode, counter mode,
  • period/rate mode and continuous/rate mode
  • 8 outputs, isolated in groups of 2
  • outputs are current-sourcing at 5 to 24V dc (2A maximum peroutput)
  • single-ended or differential inputs
  • 2-phase encoder inputs up to a frequency of 250KHz
  • single-phase counter inputs up to a frequency of 1MHz
  • input voltage range of 5 to 24V dc
  • returns in status either count or frequency in binary or BCD format
  • input counts as high as 999,999
  • up to 500KHz in period/rate or rate measurement frequency modes
  • outputs can be tied to any counter
  • each output has a user-selectable on-off value
  • outputs can be tied back to an input for cascading
  • automatic default configuration
  • each counter has a user-selectable preset and rollover value
  • period/rate w/periodic output
 
Allen Bradley 1771-VHSC Operation Modes
  • counter mode
  • encoder X1 mode
  • encoder X4 mode
  • period/rate mode
  • rate measurement frequency mode
  • continuous/rate mod
 

 

PDFs

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ManufacturerAllen Bradley
Range typeCounter Module
RangePLC-2
EAN612598114907
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