Product Overview

The ABB TA562-RS-RTC, ordering number 1SAP181500R0001, is an option board for compatible ABB AC500-eCo V2 programmable logic controllers. It combines a COM2 RS-485 serial interface with a real-time clock function in a single accessory, allowing supported PLC configurations to add serial communication and clock functionality together. <Cite refs={[“turn809929search4″,”turn809929search12”]}/>

In a machine control panel, the serial interface can be used to exchange data with compatible instruments, operator panels, or other serial devices. The integrated real-time clock is useful when the PLC application needs to associate events or process data with date and time information. For example, a controller can communicate with a serial instrument while recording time-related operating events in its application, provided the processor and program support the required functions.

The TA562-RS-RTC differs from the TA562-RS, which adds the COM2 serial interface without the combined clock function. It also differs from the TA569-RS-ISO, which provides galvanic isolation for the serial interface. These variants should not be treated as interchangeable without checking the required functions and processor compatibility.

Before selecting this adapter, confirm the exact CPU model, option-board interface, and serial communication requirements. The real-time clock also depends on the applicable battery arrangement and controller configuration, so the complete installation requirements should be checked during commissioning.

Technical Specifications

Product Features

• Combined serial and clock functions: Integrates a COM2 RS-485 interface and real-time clock in one option board.
• COM2 communication: Supports serial data exchange with compatible external equipment.
• Date and time information: Allows supported PLC applications to use clock data for time-based operations and event records.
• Pluggable screw terminal block: Provides the designated connection for the serial interface.
• AC500-eCo V2 integration: Belongs to the accessory range for compatible processor hardware.
• Separate battery provision: The specified CR2032 battery must be accounted for where required by the clock’s backup arrangement.
• Distinct accessory identification: The TA562-RS-RTC designation distinguishes the combined-function board from the serial-only TA562-RS.

Working Principle

The TA562-RS-RTC combines two functions that serve different purposes within a PLC system. Its RS-485 interface carries serial data between the processor and a compatible external device, while the real-time clock supplies date and time information for applications that require time-based processing.

The communication path is:

AC500-eCo Processor → TA562-RS-RTC COM2 → RS-485 Network → External Serial Device

RS-485 uses differential signaling over a pair of conductors. The PLC application determines the protocol and how received or transmitted data is handled. If the connection uses Modbus RTU, for example, the PLC and external device must share compatible baud rate, parity, data format, and addressing settings.

The clock function operates separately from serial data transmission. It provides time information that a supported PLC application can use when recording events, scheduling operations, or tracking process changes. Clock retention during loss of controller power depends on the supported backup arrangement and battery condition.

During commissioning, both functions should be checked independently. A working serial connection does not establish that the clock is correctly set, and correct clock operation does not confirm that the RS-485 network is configured properly. The application should be tested for communication response, valid date and time values, and correct handling of power interruption.

Role in the AC500-eCo PLC Architecture

The TA562-RS-RTC extends the processor’s communication and timekeeping capabilities. The CPU continues to execute the PLC program, while the option board supplies the additional serial interface and real-time clock function.

Industrial Applications

Installation and Maintenance

1. Verify the complete part number: Confirm TA562-RS-RTC and ordering number 1SAP181500R0001 against the existing accessory and processor documentation.
2. Check processor compatibility: Identify the exact AC500-eCo processor model and hardware generation before installing the option board.
3. Isolate the controller: Follow the processor’s shutdown procedure and disconnect the required power before installing or removing the accessory.
4. Inspect the option-board interface: Check the designated connection for contamination, damaged contacts, or mechanical obstruction.
5. Install the board correctly: Align the TA562-RS-RTC with the appropriate interface and seat it according to the processor’s installation instructions.
6. Check the battery requirement: Verify whether a CR2032 battery is required for the installed configuration and confirm that it is correctly fitted and in serviceable condition.
7. Inspect the serial terminal block: Check the terminal block and conductors for loose connections, damaged insulation, or incorrect wiring.
8. Verify RS-485 wiring: Confirm the signal connections, cable arrangement, and any required termination or biasing for the communication network.
9. Configure the protocol: Match the PLC and external device settings, including baud rate, parity, data format, and device address where applicable.
10. Set and verify the clock: Confirm that the date and time are correct and check the clock’s behavior after the relevant power-cycle test.
11. Test communication and timekeeping separately: Verify serial data exchange, then confirm that the application reads valid clock values and uses them as intended.
12. Record the configuration: Document the board ordering number, processor model, battery status, communication settings, and commissioning results.

Compatible System Components

Recommended Related Models

Key Advantages

• Combines COM2 RS-485 communication and a real-time clock.
• Supports time-based application functions alongside serial data exchange.
• Uses a pluggable screw terminal block for the serial connection.
• Has a distinct ordering number for replacement identification.
• Reduces the need to select separate serial and clock accessories where the combined board is supported.

Technical FAQs

What is the difference between the TA562-RS and TA562-RS-RTC?

The TA562-RS provides the COM2 RS-485 interface. The TA562-RS-RTC combines the same general serial-interface function with a real-time clock, so the latter is appropriate when both functions are required and supported by the processor.

Does the TA562-RS-RTC require a separate battery?

The associated documentation identifies a CR2032 battery as a separate item for the clock backup arrangement. Check the installed hardware and its battery requirements before commissioning.

Can the COM2 interface communicate with Modbus RTU devices?

It can be used in a compatible Modbus RTU arrangement when the PLC application and external device support the protocol. Communication parameters, addressing, and RS-485 wiring must be configured consistently.

What should be checked if the clock resets after the controller is switched off?

Check the battery requirement, battery condition, installation, and the processor’s supported clock-backup arrangement. Also verify that the PLC application sets or reads the clock correctly after power is restored.