Allen-Bradley 1769-HSC High-Speed Counter Module

The Allen-Bradley 1769-HSC is a high-performance Compact I/O module, specifically designed for high-frequency switching applications. This High-Speed Counter module plays a vital role in position monitoring, totalizer functions, and motion control. It is compatible with CompactLogix and MicroLogix 1500 controllers, providing seamless integration with various high-speed sensing devices such as encoders and pulse output transmitters.

Key Features:

High-Speed Counter: Operates at 1 MHz frequency, delivering precise control.
Input Channels: Includes 2 quadrature (ABZ) differential inputs with a voltage range of 2.6–30V DC.
Output Channels: Offers 16 outputs in total: 4 physical and 12 virtual channels.
On-State Current: 1A per point, with a total of 4A per module.
Power Supply: Operates with a 24V DC input.
Wiring: Supports 22–14 AWG solid copper or 22–16 AWG stranded copper wire.

Technical Specifications

Specification	Value
Part Number	1769-HSC
Manufacturer	Allen-Bradley
Product Type	High-Speed Counter Module
Product Line	CompactLogix
Module Type	Compact I/O High-Speed Counter Module
Inputs	2 quadrature (ABZ) differential inputs
Input Voltage Range	2.6–30V DC
Input Frequency	1 MHz
Outputs	16 total outputs: 4 physical, 12 virtual
Output Voltage Range	5–30V DC
On-State Current	1A per point, 4A per module
Isolation Voltage	75V continuous, reinforced insulation tested at 1200V AC for 2s
Power Consumption	33.6 Watts
Power Dissipation	7.5 Watts
Bus Current Draw @ 5V DC	425 mA
Bus Current Draw @ 24V DC	0 mA
Power Supply Distance Rating	Module must not be more than 4 modules from power supply
Recommended Cable	Individually shielded twisted-pair (or recommended by encoder)
Wire Size	22 to 14 AWG (solid), 22 to 16 AWG (stranded)
Operating Temperature	0–60°C
Non-Operating Temperature	-40°C to 85°C
Enclosure Type	Open
Wire Type	Copper-90°C insulation rated
Wire Insulation Temperature	90°C (194°F)

Performance and Applications

The 1769-HSC module excels in high-speed counting applications. It is perfect for flow control, position tracking, speed measurement, and duration monitoring. The module features a 1 MHz input frequency, making it ideal for systems requiring fast and accurate control. The two quadrature differential inputs handle pulse widths as small as 250 ns, ensuring precise tracking of high-speed events.

In addition to the inputs, the module also includes 4 physical and 12 virtual outputs, which allow you to interface with devices such as encoders and high-speed sensors. The output channels support a 5–30V DC voltage range, offering flexibility for different industrial control systems. With a maximum On-State current of 1A per point, this module provides robust power handling for demanding applications.

I/O Expansion and Installation

Installing the 1769-HSC is straightforward. It must be connected to the power supply within 4 modules. Be aware that the module should not be removed while powered on to ensure safety. The module supports high-speed devices such as encoders and pulse output transmitters. It also supports 4 onboard 5-30V DC sourcing outputs for precise motion and position control.

Wiring and Cabling

The 1769-HSC requires individually shielded twisted-pair cables for signal transmission. It supports 22 to 14 AWG solid copper or 22 to 16 AWG stranded copper wire, both rated for 90°C (194°F) insulation. Use high-quality cables to ensure reliable performance, especially in demanding industrial environments.