PLCs, Power Supplies & Others

Technical Specifications Overview

Functional Overview and Time Synchronization

This module provides precise time synchronization for distributed ABB control systems. It ensures all connected devices share a common time reference for event logging. The INTKM01 acts as a master clock for the entire automation network. Moreover, the module supports multiple synchronization protocols for flexible deployment. It accepts external references from GPS receivers or existing IRIG-B sources. The module then distributes this time to all slave devices across the network. Consequently, operators gain accurate timestamping for sequence-of-events recording.

Synchronization Sources and Reference Inputs

The ABB INTKM01 offers several reference input options for time acquisition. It can connect to a GPS receiver for direct UTC synchronization. Alternatively, the module accepts an external IRIG-B signal from an existing master clock. The module also supports pulse-per-second (PPS) inputs for high-precision applications. Furthermore, the module includes a battery-backed real-time clock for holdover operation. This internal clock maintains accurate time during reference signal loss. The module automatically selects the best available reference source.

Distribution Protocols and Output Interfaces

The module distributes time through multiple output channels simultaneously. The Ethernet port provides NTP and SNTP services to network-connected devices. The RS-485 port outputs an IRIG-B signal for legacy equipment. Additionally, the module provides a dedicated PPS output for precision timing needs. Each output operates independently and carries the same synchronized time base. The module also supports the ABB proprietary synchronization protocol. This native protocol ensures seamless integration with ABB I/O and controller families.

Timekeeping Accuracy and Holdover Performance

The module achieves exceptional accuracy when synchronized to a GPS reference. Under these conditions, the INTKM01 maintains ±1 µs alignment to UTC. During holdover mode without an external reference, accuracy remains within ±50 µs over 24 hours. This performance stems from the high-stability internal oscillator. The module also compensates for oscillator drift using temperature sensing. This compensation ensures consistent accuracy across varying environmental conditions. The battery-backed RTC preserves time during power outages.

Physical Architecture and Mounting Specifications

The module features a compact design with dimensions of 45 mm x 130 mm x 105 mm (1.8″ x 5.1″ x 4.1″) . Its weight of approximately 0.20 kg makes it one of the lighter modules in the series. The front panel provides a removable 5-pin terminal block for RS-485 wiring. The RJ45 Ethernet port offers straightforward network connectivity. The dedicated PPS terminal accepts standard screw-type connections. The module mounts on standard DIN rails using an integrated latch. The rear housing provides adequate space for passive cooling.

Status Indication and Diagnostic Features

The module features four front-panel LEDs for clear status indication. A green Power LED confirms correct supply voltage. A Sync LED indicates successful synchronization with a reference source. An Error LED alerts users to configuration or signal problems. A PPS LED pulses once per second to confirm output activity. The module also logs synchronization status and reference quality internally. Through the ABB Master Software, you can view detailed timing statistics. This diagnostic capability simplifies troubleshooting and system verification.

Power Supply and Energy Storage Features

The module draws a modest 60 mA from a 24 VDC external supply. The integrated 100 µF capacitor provides ride-through during brief interruptions. The CR2032 lithium battery sustains the real-time clock for up to five years. This battery ensures time retention during extended power outages. The module also includes reverse-polarity protection on the power input. The internal voltage regulator maintains stable operation despite supply fluctuations.

Environmental Conditions and Standards Compliance

The module operates reliably from 0°C to +60°C ambient temperature. Storage temperatures range from -40°C to +85°C. The unit carries CE, UL, and CSA certifications. Install the module in a clean, dry control cabinet. The module also supports the IEEE 1588 precision time protocol profile. This compliance enables interoperability with other precision timing equipment.

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