Allen-Bradley 1756HP-TIME ControlLogix High-Precision Time Synchronization Module

Allen-Bradley 1756HP-TIME High-Precision Time Synchronization Module

The Allen-Bradley 1756HP-TIME delivers microsecond-level time synchronization across distributed ControlLogix systems, enabling coordinated motion control, sequential event recording, and time-stamped data logging for mission-critical industrial applications. Engineered for process industries, power generation, and advanced manufacturing environments where precise timing correlation is essential, this module implements IEEE 1588 Precision Time Protocol (PTP) to maintain clock accuracy within 1 microsecond across EtherNet/IP networks.

Technical Specifications

• Model Number: 1756HP-TIME
• Time Protocol: IEEE 1588-2008 Precision Time Protocol (PTPv2)
• Synchronization Accuracy: ±1 microsecond typical (network-dependent)
• Clock Source: Internal oscillator with GPS/IRIG-B input capability
• Network Interface: EtherNet/IP via ControlLogix backplane
• Update Rate: Configurable from 1 to 128 packets per second
• Time Resolution: 1 nanosecond internal resolution
• Operating Temperature: 0°C to 60°C (32°F to 140°F)
• Power Consumption: 3.5W typical at 5V DC from backplane
• Mounting: ControlLogix 1756 chassis slot
• Certifications: UL, cUL, CE, ATEX, IECEx
• Dimensions: 35mm (W) × 147mm (H) × 132mm (D)

Application Scenarios

Deploy the 1756HP-TIME across demanding synchronization requirements:

• Multi-Axis Motion Systems: Coordinate servo drives and motion controllers with sub-millisecond precision for synchronized cutting, packaging, and assembly operations
• Sequence of Events Recording: Capture fault sequences in power substations and utility control systems with microsecond-accurate timestamps for root cause analysis
• Distributed Process Control: Synchronize batch controllers, recipe management systems, and data historians across geographically dispersed facilities
• Test & Measurement: Align data acquisition systems, vibration monitors, and quality inspection stations for correlated analysis
• Redundant Control Systems: Maintain bumpless transfer timing in redundant ControlLogix pairs for high-availability applications

Integration Solutions

The 1756HP-TIME operates as a PTP grandmaster or boundary clock within your ControlLogix architecture, distributing time references to controllers, I/O modules, and intelligent devices. Configure the module via Studio 5000 Logix Designer to select clock sources, adjust sync intervals, and monitor synchronization health through built-in diagnostics.

For GPS-referenced absolute time, connect external IRIG-B or NMEA sources to establish UTC traceability. The module automatically handles leap seconds, daylight saving transitions, and network topology changes while maintaining synchronization integrity. Pair with 1756-EN2TR EtherNet/IP modules for PTP-aware network switching, or integrate with 1756-L61/B controllers to access synchronized timestamps in ladder logic. Combine with 1756-EN2T communication interfaces for distributed time synchronization across multiple chassis.

Common Questions

Q: What is the difference between IEEE 1588 and NTP time synchronization?
A: IEEE 1588 PTP achieves sub-microsecond accuracy through hardware timestamping and symmetric delay measurement, while NTP typically provides millisecond-level accuracy. The 1756HP-TIME uses PTP for precision industrial applications requiring coordinated control.

Q: Can this module synchronize non-ControlLogix devices?
A: Yes, the 1756HP-TIME distributes PTP time to any IEEE 1588-compliant device on the EtherNet/IP network, including third-party drives, sensors, and data acquisition systems that support PTPv2.

Q: How many devices can be synchronized from a single module?
A: The module supports unlimited PTP clients on the network. Practical limits depend on network bandwidth and topology, but typical installations synchronize 50-200 devices per grandmaster clock.

Q: Does the module require GPS for operation?
A: No, the 1756HP-TIME operates with its internal oscillator for relative time synchronization. GPS or IRIG-B inputs are optional and only required when absolute UTC time reference is needed.

Warranty & Technical Support

Every 1756HP-TIME module is backed by a comprehensive 12-month warranty covering manufacturing defects and component failures. Our engineering team provides configuration assistance, PTP network design consultation, and troubleshooting support to ensure successful deployment in your time-critical applications.

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