1756-TIME | Allen-Bradley ControlLogix High-Accuracy Time Synchronization Module

Product Overview

The Allen-Bradley 1756-TIME functions as the master time-reference coordinator for ControlLogix platforms. This module provides nanosecond-level synchronization across distributed control systems by interfacing with GPS or Global Navigation Satellite Systems (GNSS). It establishes a Coordinated Universal Time (UTC) reference, allowing multiple chassis to align data logs, motion sequences, and sequence-of-event (SOE) timestamps with absolute precision. We supply this unit in 100% Brand New condition, ensuring a factory-fresh internal clock and full signal integrity for your critical infrastructure.

Technical Specifications

• Backplane Current Draw: 1.01A @ 5.1V DC; 2.64 mA @ 1.2V DC

• Operating Temperature (Series B): 0 to +50 °C (+122 °F)

• Operating Temperature (Series C): 0 to +60 °C (+140 °F)

• Relative Humidity: 5% to 95% non-condensing (IEC 60068-2-30)

• ESD Immunity: 4 kV contact; 8 kV air discharges (IEC 61000-4-2)

• EFT/B Immunity: ±2 kV at 5 kHz on signal and communication ports

• Conducted RF Immunity: 10V rms (150 kHz to 80 MHz)

• Wiring Category: Category 2 (Signal and Communication ports)

• Dimensions (HxWxD): 14.52cm x 3.46cm x 13.96cm

• Enclosure: Open-style (Chassis mount)

Engineering Advantages

The 1756-TIME eliminates timing discrepancies in complex automation networks through advanced synchronization and hardened electrical protection:

• High-Precision SOE Logging: The module synchronizes system clocks across the backplane to within microseconds. This enables accurate Sequence of Events (SOE) recording, allowing engineers to pinpoint the exact millisecond a fault occurs across multiple controllers in a power plant or refinery.

• Superior Electromagnetic Resilience: Integrated immunity against ESD, EFT, and Conducted RF ensures the timing signal remains stable in high-voltage environments. The module filters out electrical noise from nearby variable frequency drives (VFDs) to maintain a jitter-free clock pulse.

• Scalable Chassis Compatibility: The hardware supports both Series B and Series C chassis. When installed in a Series C chassis, the module handles higher thermal loads (up to 60 °C), allowing for dense I/O configurations without requiring external cooling fans.

• Standardized Network Timing: By utilizing IEEE 1588 Precision Time Protocol (PTP), the 1756-TIME aligns all EtherNet/IP devices to a single grandmaster clock. This synchronization optimizes high-speed motion control and ensures data integrity for regulatory compliance reporting.

FAQs

• Does the 1756-TIME require an external antenna?

  Yes. To receive GPS/GNSS signals for UTC synchronization, you must connect a compatible external antenna to the module's signal port. Ensure you use Category 2 shielded cabling to prevent signal interference.

• Is this a Brand New original product?

  Yes. We guarantee this 1756-TIME is 100% Brand New original factory stock. In high-precision timing applications, new hardware ensures that internal oscillators and protection components meet their full rated service life and accuracy specifications.

• Can I install the 1756-TIME in any slot?

  The module occupies a single slot and installs in any available slot in a ControlLogix chassis. However, most engineers place it in the same chassis as the primary controller to minimize backplane latency.

• How does the module handle high-humidity environments?

  The 1756-TIME meets IEC 60068-2-30 standards for damp heat. It operates reliably in non-condensing humidity up to 95%, making it suitable for standard industrial control cabinets in various climates.