1769-HSC Allen-Bradley Compact I/O Counter Module

1769-HSC Allen-Bradley Compact I/O High Speed Counter Module

1769-HSC Allen-Bradley Compact I/O High Speed Counter Module

Availability: 99 left in stock

Allen-Bradley 1769-HSC Compact I/O High Speed Counter Module The Allen-Bradley 1769-HSC, also cataloged as the 1769-HSC High Speed Counter Module,...

SKU: 1769-HSC

Manufacturer: Allen Bradley
Product No.: 1769-HSC
Product Type: High Speed Counter Modules
Product Origin: USA
Payment:T/T, Western Union
Weight: 280g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Allen-Bradley 1769-HSC Compact I/O High Speed Counter Module

The Allen-Bradley 1769-HSC, also cataloged as the 1769-HSC High Speed Counter Module, operates as a dedicated hardware component for high-frequency pulse detection and real-time quadrature encoder signal processing within CompactLogix and MicroLogix 1500 controller platforms. It provides direct physical hardware counting up to 1 MHz and local output actuation, bypassing backplane scan latency to support high-velocity motion and position tracking.

Hardware Specifications

Parameter	Specification
Model	1769-HSC
Brand	Allen-Bradley / Rockwell Automation
Origin	USA
Weight	0.28 kg
Dimensions	118 mm x 35 mm x 87 mm
Operating Temp	0 to +60 deg C
Power Consumption	220 mA at 5.1 VDC backplane power
Input Channels	2 Quadrature (ABZ) Differential / 6 Differential DC
Input Frequency	Up to 1 MHz
Input Voltage Range	2.6 VDC to 30 VDC
Physical Outputs	4 Sourcing DC Outputs (1 A per channel)
Virtual Outputs	12 Logic-based Outputs
Output Voltage Range	5 VDC to 30 VDC
Enclosure Type	Open Style
Certifications	UL, CE, cULus, Class I Div 2

Backplane Bus Communication & Latency Execution

The module interfaces directly with the CompactLogix local backplane bus, utilizing high-velocity backplane bus communication drivers to update count registers and status tables without CPU interrupt delay. Internal onboard logic processors evaluate 12 virtual output configurations simultaneously against real-time encoder counts, enabling sub-millisecond physical output toggling independent of the controller main scan cycle. High channel density scaling allows flexible configuration of the 6 hardware inputs into two independent 1 MHz ABZ quadrature sets or four single-ended counter channels, maintaining signal integrity and suppressing electrical crosstalk across adjacent backplane slots.

Frequently Asked Questions

Q: Can the 1769-HSC handle single-ended encoder inputs, or does it require differential signals only?

A: The module natively accepts ABZ differential input configurations for maximum noise rejection, but field wiring terminals accept single-ended 2.6 VDC to 30 VDC signals by jumpering the unused negative differential terminal to common ground per standard Rockwell wiring guidelines.

Q: How do the local physical outputs react compared to standard controller I/O?

A: The 4 physical sourcing outputs actuate directly based on internal module threshold logic (including virtual output mapping), achieving switching latencies under 50 microseconds without waiting for backplane data transfers to the controller CPU.

Q: What is the maximum backplane current draw for a single 1769-HSC module?

A: The module draws up to 220 mA at 5.1 VDC from the 1769 Compact I/O backplane bus, which must be accounted for when calculating system power supply distance ratings and expansion bank sizing.

Field Installation Guidelines

Ensure system power supply modules are completely de-energized prior to mounting or removing the 1769-HSC module from the DIN rail or panel plate. Secure the module to adjacent Compact I/O units using integral tongue-and-groove locks to establish rigid backplane bus connections. High-speed signal lines (encoder channels A, B, and Z) must use individually shielded, twisted-pair cables routed through dedicated, grounded metallic conduits separate from high-voltage AC lines, motors, or Variable Frequency Drive (VFD) output leads. Cable shields must land at a single chassis ground bus point near the I/O enclosure to prevent ground loop noise from corrupting pulse detection. Terminate input signals using proper terminal tightening torque settings, maintaining at least 5 full thread engagements on field screw terminals.

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