GPS Time Sync 1756-TIME Allen Bradley ControlLogix

Product Overview

The Allen-Bradley 1756-TIME is a time synchronization module for ControlLogix systems. It acquires precise UTC time from GPS satellites or IRIG-B sources and distributes it via PTP, NTP, and IRIG-B, serving as a grandmaster clock for sequence of events and motion control applications.

Key Specs

• Time sources: GPS antenna, IRIG-B (AM or DC), PTP, NTP
• Output protocols: PTP (CIP Sync), NTP, IRIG-B, 1PPS
• Ports: 2 Ethernet, 1 IRIG-B BNC, 1 GPS SMA
• Backplane current: 1.2 A @ 5 V DC, 2.5 mA @ 24 V DC
• Power dissipation: 6.19 W max
• Status indicators: PPS, SYNCH, OK LEDs
• Operating temperature: 0 to 60 °C

Why Choose This

• Eliminates clock drift with atomic satellite time reference
• Dual Ethernet ports support DLR network topology
• Microsecond-level synchronization across distributed ControlLogix chassis
• Essential for SOE recording and CIP Motion applications

Common Questions

• Is the GPS antenna included? No, the antenna, coax cable, and lightning arrestor must be purchased separately.
• Which protocols does it support? IRIG-B, PTP (IEEE 1588), NTP, CST, and UTC.
• How many modules are needed per system? One 1756-TIME serves as grandmaster for the entire network.

Mounting Steps

1. Install the module in any available slot of the 1756 chassis.
2. Mount the GPS antenna externally with clear sky view.
3. Connect the antenna to the SMA port using low-loss coax cable.
4. Connect Ethernet ports to the network for PTP/NTP distribution.
5. Configure PTP priorities in Studio 5000 Logix Designer and verify SYNCH LED.

Buying Advice

• Required for sequence of events applications with ControlLogix 5580 controllers.
• Use the 1756HP-TIME for HiPro version with enhanced features.
• Plan antenna cable runs under 30 m or add an inline amplifier.