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The Allen-Bradley 1756HP-TIME is a high-precision ControlLogix time synchronization module designed to maintain accurate, system-wide time alignment across industrial automation networks.

Developed for mission-critical environments, it acts as a timing gateway that synchronizes PLC racks using GPS, IRIG-B, PTP (Precision Time Protocol), and NTP. This makes it especially valuable in industries where event sequencing, timestamp accuracy, and coordinated control are essential—such as power generation, oil & gas, and large-scale distributed automation systems.

Unlike standard communication modules, the 1756HP-TIME focuses entirely on deterministic time accuracy, ensuring every controller in the system shares a unified clock reference.

Technical Specifications

Category	Specification
Product Type	Time Synchronization / GPS Timing Module
Series	ControlLogix 1756
Time Sources	GPS, IRIG-B, PTP (CIP Sync), NTP
Network Interface	Dual Ethernet ports
GPS Interface	SMA antenna connector
IRIG-B Support	Coaxial input/output
Synchronization Accuracy	Sub-microsecond (high precision timing)
Backplane Power	Supplied via ControlLogix chassis
Operating Temperature	0°C to 60°C
Dimensions (H × W × D)	14.5 × 3.5 × 13.9 cm
Weight	~1.0 kg

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1756HP-TIME Time Synchronization Module
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Applications

The 1756HP-TIME is used in environments where precise timing is not optional but operationally critical:

Electrical grid synchronization and substation automation
High-speed manufacturing line coordination
Oil & gas pipeline monitoring systems
Aerospace and defense timing systems
Financial and data acquisition systems requiring timestamp accuracy
Distributed SCADA systems with multi-controller synchronization

Its ability to unify time across multiple communication protocols makes it a backbone component in complex industrial architectures.

Advantages

Ultra-precise system-wide time synchronization
Multi-source timing support (GPS, IRIG-B, PTP, NTP)
Dual Ethernet ports for redundant communication paths
Seamless integration with ControlLogix architecture
High reliability for mission-critical industrial systems
Reduces timing drift across distributed PLC networks
Supports advanced event logging and sequence-of-events accuracy

Technical FAQs

1. What is the main function of the 1756HP-TIME?
It synchronizes time across ControlLogix systems using multiple precision timing sources.

2. Does it use GPS for timing?
Yes, it includes GPS-based synchronization via an external antenna.

3. What protocols does it support?
It supports PTP (CIP Sync), NTP, and IRIG-B in addition to GPS.

4. Is it still actively manufactured?
It is primarily used in legacy and specialized systems rather than modern new installations.

5. What is the accuracy level?
It provides sub-microsecond-level synchronization depending on configuration.

6. Can it operate without GPS?
Yes, it can use NTP or IRIG-B as alternative time sources.

7. How is it powered?
It draws power directly from the ControlLogix backplane.

8. What industries use it most?
Power utilities, oil & gas, transportation systems, and high-speed manufacturing.

9. Does it support redundant networking?
Yes, it includes dual Ethernet ports for resilient network topology design.

10. Why is precise time synchronization important?
It ensures accurate event sequencing, fault detection, and coordinated system control across distributed automation systems.

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