Product Overview
The Allen-Bradley 1756HP-TIME is a ControlLogix Time Synchronization Module that leverages Global Positioning System (GPS) technology to deliver precise, synchronized time across industrial control networks. Designed for demanding automation environments, this module installs directly into a ControlLogix chassis, occupying a single slot, and provides a reliable time reference for critical operations such as event sequencing, data logging, and coordinated control.
With integrated Ethernet, IRIG-B, and antenna connections, the 1756HP-TIME supports multiple synchronization standards, including IRIG-B, Precision Time Protocol (PTP) over Ethernet, Network Time Protocol (NTP) over Ethernet, and ControlLogix backplane time for CST and UTC conversion. This versatility makes it an essential component for any ControlLogix-based system requiring high-accuracy time alignment.
Technical Specifications
| Parameter |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number/Catalog No. |
1756-TIME |
| Series |
ControlLogix |
| Module Type |
Time Synchronization Module |
| Clamp Type |
Spring-Clamp |
| Pins |
20-Pin Connection |
| Status Indicators |
PPS, SYNCH, OK |
| Weight |
0.3 pounds (0.1 kilograms) |
| Built-in Communication Ports |
Ethernet, IRIG-B, Antenna |
| Technology |
Global Positioning System (GPS) |
| Backplane Current (5V) |
1,200 milliamps |
| Backplane Current (24V) |
2.5 milliamps |
| Power Dissipation (Max) |
6.19 Watts |
| Voltage & Current Rating |
Backplane: 1.01A @ 5.1V DC, 2.64 mA @ 1.2V DC |
| Wire Size |
20 AWG |
| Isolation Voltage |
30V (continuous), Basic Insulation, tested at 1000V AC for 60s (Ethernet Ports to Backplane, IRIG-B to Backplane) |
| Dimensions |
5.51 x 4.41 x 5.71 inches |
| Enclosure Type Rating |
None (Open) |
| Operating Temperature |
32-140°F (0-60°C) |
| Slot Width |
1 |
These specifications confirm the 1756HP-TIME's suitability for integration into standard ControlLogix systems, offering low power consumption and compact dimensions for efficient panel space utilization.
Key Features & Benefits
-
GPS-Based Synchronization: Provides accurate time across multiple interfaces using GPS technology, ensuring consistent time stamps across the network.
-
Multiple Protocol Support: Supports IRIG-B, PTP, NTP, and ControlLogix backplane time (CST/UTC), offering flexibility for various synchronization architectures.
-
Integrated Connectivity: Includes Ethernet ports (with Rockwell Automation dual-port switch technology), IRIG-B BNC connector, and SMA antenna connector for GPS bullet antenna.
-
Simple Installation: Occupies a single slot in a 1756 ControlLogix chassis; powered directly from the backplane.
-
Status Indication: PPS, SYNCH, and OK LEDs provide immediate operational feedback.
-
Configuration via Studio 5000: Set up using Studio 5000 Logix Designer; initial IP address assignable via BOOTP/DHCP server.
Industry Applications
The 1756HP-TIME is ideal for industries where precise time correlation is critical, such as power generation, oil and gas, water treatment, and discrete manufacturing. In these environments, synchronized time is essential for:
- Event sequencing and alarm management
- Data acquisition and timestamping
- Coordinated control across multiple PLCs
- Post-incident analysis and troubleshooting
For example, in a power substation, the 1756HP-TIME ensures that protective relay events are timestamped with microsecond accuracy, enabling engineers to reconstruct fault sequences accurately. In a manufacturing plant, synchronized time across production lines helps correlate quality data with machine operation, improving root cause analysis.
Installation & Setup
Installing the 1756HP-TIME is straightforward:
- Insert the module into any available slot in a 1756 ControlLogix chassis. It is compatible with all 1756 chassis.
- Connect the GPS antenna to the SMA connector and mount the antenna where it has a clear view of the sky for optimal satellite reception.
- Connect the IRIG-B network to the BNC connector if used.
- Connect Ethernet cables to the RJ45 ports (ports 1 and 2) for network integration.
- Power up the system; the module is powered via the backplane.
- Configure the module using Studio 5000 Logix Designer. Set the initial IP address using BOOTP/DHCP server as needed.
Ensure the module is properly seated and that all connections are secure. For best performance, use 20 AWG wiring for field connections.
Maintenance & Reliability
The 1756HP-TIME is designed for long-term reliability with no moving parts. To maintain optimal performance:
- Periodically check the GPS antenna for obstructions or damage.
- Inspect Ethernet and IRIG-B cables for wear or loose connections.
- Verify that the module's status LEDs indicate normal operation (OK LED steady green, SYNCH LED lit when locked to time source).
- Keep the module's ventilation clear to ensure proper cooling.
Routine checks every 6–12 months help prevent downtime and extend service life, making the 1756HP-TIME a cost-effective choice for long-term operations.
Compatibility & Integration
The 1756HP-TIME is fully compatible with the ControlLogix platform, including 1756 chassis and 1756 controllers. It integrates seamlessly with Studio 5000 Logix Designer for configuration and monitoring. The module supports multiple time synchronization protocols, allowing it to act as a time master or slave in IRIG-B networks, and as an NTP/PTP server or client over Ethernet. This flexibility ensures easy integration into existing automation architectures.
Selection Guide & Purchasing Advice
When selecting the 1756HP-TIME, verify the following:
- Compatibility with your ControlLogix chassis and firmware versions.
- Availability of a GPS antenna with SMA connector (not included).
- Network infrastructure supporting NTP or PTP if used.
- IRIG-B network configuration if used.
PLC Source PRO offers genuine Allen-Bradley modules with competitive pricing and fast shipping. Contact our team to confirm availability and get expert advice on your specific application.