The Allen-Bradley 1771-VHSC high-speed counter module, developed by Rockwell Automation, is designed to enhance PLC capabilities with precise counting features and adaptable digital inputs and outputs. Featuring four configurable input channels, this module operates in multiple modes including rate, encoder, counter, and period/rate, and supports input frequencies up to 1 MHz for single-channel counter applications, making it suitable for complex motion control and totalizer tasks. It also supports differential and single-ended inputs, utilising block transfer instructions for efficient communication with the PLC processor. With a wide operating temperature range from 32 to 140 degrees Fahrenheit and robust isolation voltage, it is ideal for diverse industrial environments, integrating effortlessly into a 1771 chassis with a single slot occupancy and a backplane current requirement of 650 mA.
Technical specifications for 1771-VHSC
Typical DC Signal Delay (Off)
30 (+/- 7) milliseconds
Typical AC Signal Delay (Off)
29 (+/- 8) milliseconds
Required External Power
None
I/O Connection Hardware
1771-RTP1
Wiring Arm
1771-WN
Backplane Current
0.65 Amps
Module Update Period
100 Microseconds
Slots
1 Slot
Outputs
8 Digital Outputs
Max Input Frequency
1 Megahertz (in counter mode)
Inputs
12 Digital Inputs (3 Per Counter)
Module Type
High-Speed Counter Module
Part Number/Catalog No.
1771-VHSC
Dimensions
4.5 x 12.4 x 6.3 in ches(115 x 317 x 160 millimeters)
