Allen-Bradley 1769-HSC CompactLogix 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-speed pulse processing and quadrature encoder interface execution within CompactLogix systems.
Suffix Breakdown & Model Matrix
| Base Catalog Number | Channels / Inputs | Operating Voltage Range | Maximum Input Frequency |
|---|---|---|---|
| 1769-HSC | 2 Quadrature (A/B/Z) or 4 Single-Ended | 5 VDC / 12 to 24 VDC | 1 MHz (Differential) / 250 kHz (Single-Ended) |
| 1769-IQ6XOW4 | 6 Inputs / 4 Outputs | 24 VDC Input / AC-DC Output | Standard I/O Frequency (< 1 kHz) |
| 1769-ARM | Address Reserve Module | N/A | Passive Slot Saver |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-HSC |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.00 lbs (0.45 kg) |
| Dimensions | Standard 1769 Single-Slot Form Factor |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | 425 mA @ 5 VDC (0 mA @ 24 VDC backplane) / 6.21 W max heat dissipation |
| Channel Configuration | 2 Quadrature Encoder Channels or 4 Single-Ended Counters |
| Continuous Isolation Voltage | 75 VDC (IEC Class 2 Reinforced Insulation) |
| Power Supply Distance Rating | 4 Modules |
| Enclosure Type | Open Type |
| Terminal Screw Torque | 0.68 Nm (6 in-lbs) |
| Retaining Screw Torque | 0.46 Nm (4.1 in-lbs) |
| Mounting Options | 35 mm DIN Rail or Direct Panel Mount |
Deterministic Network Sync and Backplane Velocity
The 1769-HSC module integrates dedicated pulse counting hardware that bypasses standard ladder logic scan delays, executing real-time position scaling and frequency calculation directly at the hardware layer. Firmware flash compatibility ensures seamless backplane bus communication velocity across CompactLogix expansion racks, enabling low-latency deterministic updates for position-critical tasks and fast motion loops.
Frequently Asked Questions
Q: What is the maximum power supply distance rating for the 1769-HSC module?
A: The 1769-HSC must be installed within 4 module slots of the system power supply (such as a 1769-PA2, 1769-PB2, 1769-PA4, or 1769-PB4).
Q: Does the 1769-HSC draw power from the 24 VDC backplane bus?
A: No. The backplane current draw is 425 mA at 5 VDC, with 0 mA current draw from the 24 VDC backplane bus.
Q: What are the torque specifications for wiring terminals and module retaining screws?
A: Terminal screws must be torqued to 0.68 Nm (6 in-lbs), while module retaining screws require a torque of 0.46 Nm (4.1 in-lbs).
Field Installation Guidelines
- Mount the module securely onto a 35 mm DIN rail or fasten to a grounded panel enclosure using M4 mounting screws.
- Confirm the module is positioned within 4 slots of the local 1769 CompactLogix power supply to satisfy backplane voltage limits.
- Completely de-energize the system power supply and field devices before attaching or removing field wiring terminal connections.
- Route high-speed encoder and counter input cables using individually shielded twisted-pair wire, keeping them isolated from AC lines and variable frequency drive (VFD) motor cables.
- Tighten the 1769 bus retaining levers to ensure proper backplane contact, and torque terminal block screws to 0.68 Nm before energizing the control rack.
Allen-Bradley 1769-HSC CompactLogix High-Speed Counter Module
Allen-Bradley 1769-HSC CompactLogix 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-speed pulse processing and quadrature encoder interface execution within CompactLogix systems.
Suffix Breakdown & Model Matrix
| Base Catalog Number | Channels / Inputs | Operating Voltage Range | Maximum Input Frequency |
|---|---|---|---|
| 1769-HSC | 2 Quadrature (A/B/Z) or 4 Single-Ended | 5 VDC / 12 to 24 VDC | 1 MHz (Differential) / 250 kHz (Single-Ended) |
| 1769-IQ6XOW4 | 6 Inputs / 4 Outputs | 24 VDC Input / AC-DC Output | Standard I/O Frequency (< 1 kHz) |
| 1769-ARM | Address Reserve Module | N/A | Passive Slot Saver |
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-HSC |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.00 lbs (0.45 kg) |
| Dimensions | Standard 1769 Single-Slot Form Factor |
| Operating Temp | 0 to 60 deg C (32 to 140 deg F) |
| Power Consumption | 425 mA @ 5 VDC (0 mA @ 24 VDC backplane) / 6.21 W max heat dissipation |
| Channel Configuration | 2 Quadrature Encoder Channels or 4 Single-Ended Counters |
| Continuous Isolation Voltage | 75 VDC (IEC Class 2 Reinforced Insulation) |
| Power Supply Distance Rating | 4 Modules |
| Enclosure Type | Open Type |
| Terminal Screw Torque | 0.68 Nm (6 in-lbs) |
| Retaining Screw Torque | 0.46 Nm (4.1 in-lbs) |
| Mounting Options | 35 mm DIN Rail or Direct Panel Mount |
Deterministic Network Sync and Backplane Velocity
The 1769-HSC module integrates dedicated pulse counting hardware that bypasses standard ladder logic scan delays, executing real-time position scaling and frequency calculation directly at the hardware layer. Firmware flash compatibility ensures seamless backplane bus communication velocity across CompactLogix expansion racks, enabling low-latency deterministic updates for position-critical tasks and fast motion loops.
Frequently Asked Questions
Q: What is the maximum power supply distance rating for the 1769-HSC module?
A: The 1769-HSC must be installed within 4 module slots of the system power supply (such as a 1769-PA2, 1769-PB2, 1769-PA4, or 1769-PB4).
Q: Does the 1769-HSC draw power from the 24 VDC backplane bus?
A: No. The backplane current draw is 425 mA at 5 VDC, with 0 mA current draw from the 24 VDC backplane bus.
Q: What are the torque specifications for wiring terminals and module retaining screws?
A: Terminal screws must be torqued to 0.68 Nm (6 in-lbs), while module retaining screws require a torque of 0.46 Nm (4.1 in-lbs).
Field Installation Guidelines
- Mount the module securely onto a 35 mm DIN rail or fasten to a grounded panel enclosure using M4 mounting screws.
- Confirm the module is positioned within 4 slots of the local 1769 CompactLogix power supply to satisfy backplane voltage limits.
- Completely de-energize the system power supply and field devices before attaching or removing field wiring terminal connections.
- Route high-speed encoder and counter input cables using individually shielded twisted-pair wire, keeping them isolated from AC lines and variable frequency drive (VFD) motor cables.
- Tighten the 1769 bus retaining levers to ensure proper backplane contact, and torque terminal block screws to 0.68 Nm before energizing the control rack.
