Allen-Bradley 1769-HSC High Speed Counter Module

Allen-Bradley 1769-HSC CompactLogix High Speed Counter/Encoder Module

Product Introduction

The 1769-HSC belongs to the 1769 Compact I/O family. You can use it with both CompactLogix and MicroLogix 1500 controllers. This high-speed counter module directly interfaces with encoders and fast sensing devices. It handles pulse outputs from transmitters with ease. Many engineers choose the 1769-HSC for position control, speed monitoring, and flow measurement applications.

Key Technical Specifications

The 1769-HSC provides two quadrature (ABZ) differential inputs. These inputs accept a voltage range of 2.6 to 30V DC. The input frequency reaches 1 MHz for counter and encoder functions. Minimum pulse width sits at 250 ns, while pulse separation requires 131 ns. Input impedance measures 1950 Ohms. The minimum ON-state current is 6.8 mA, and the maximum OFF-state voltage is 1.0V DC.

For outputs, the 1769-HSC offers 16 total channels. This breaks down into four physical outputs and twelve virtual outputs. The output voltage range spans 5 to 30V DC. Each point delivers 1 A on-state current, with a module total of 4 A. Turn-on time max is 400 µs, and turn-off time minimum is 200 µs. Reverse polarity protection handles up to 30V DC.

Bus Current and Power

The 1769-HSC draws 425 mA at 5.14V DC from the backplane. It draws 0 mA at 24V DC. Power consumption reaches 33.6 Watts, while power dissipation measures 7.5 Watts. Heat dissipation peaks at 6.21 Watts. You must install this module within four modules of the system power supply, following the power supply distance rating.

Isolation and Environmental Parameters

Isolation voltage sits at 75V continuous with reinforced insulation type. This applies to channel-to-system and channel-to-channel connections. Type testing passes 1200V AC for 2 seconds. The enclosure carries an open-style rating with no IP protection.

Operating temperature ranges from 0°C to 60°C (32°F to 140°F). Non-operating temperature spans -40°C to 85°C (-40°F to 185°F). Maximum surrounding air temperature reaches 40°C (104°F). The 1769-HSC carries North American temp code T3C and IEC temp code T4.

Mechanical Dimensions and Installation

Dimensions measure 118 x 35 x 87 mm (4.65 x 1.38 x 3.43 inches). Height including mounting tabs reaches 138 mm (5.43 inches). Shipping dimensions are 8 x 8 x 5 inches. Module weight is 130 g (0.286 lb). The 1769-HSC does not support Removal and Insertion Under Power (RIUP). Always disconnect power before installing or removing this module.

Wiring Requirements

Use individually shielded, twisted-pair cable for best performance. Alternatively, follow your encoder or sensor manufacturer's recommendation. Wire size for solid copper: 22 to 14 AWG (0.32 to 2.1 mm²). Wire size for stranded copper: 22 to 16 AWG (0.32 to 1.3 mm²). All wires must have 90°C (194°F) minimum insulation rating. The wiring category for signal ports is Category 2.

Frequently Asked Questions (FAQ)

1. Which controllers work with the 1769-HSC module?
The 1769-HSC works with CompactLogix controllers and MicroLogix 1500 systems. It fits into any 1769 Compact I/O chassis or expansion bank.

2. What is the maximum input frequency of the 1769-HSC?
The 1769-HSC accepts up to 1 MHz input frequency for counter and encoder functions. This makes it suitable for high-speed position and motion applications.

3. Can I remove the 1769-HSC while the system is powered on?
No, you cannot. The 1769-HSC does not support RIUP (Removal and Insertion Under Power). Always power down the entire system before installing or removing this module.

4. How many outputs does the 1769-HSC provide?
The 1769-HSC provides 16 outputs total. This includes 4 physical sourcing outputs and 12 virtual outputs. Each physical output handles up to 1 A at 5-30V DC.

5. What type of cable should I use with the 1769-HSC?
Use individually shielded, twisted-pair cable for best noise immunity. You can also follow the cable recommendation from your encoder or sensor manufacturer. This ensures reliable high-speed signal transmission.