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ABB TA5142-RS485: AC500, RS485 Serial
ABB TA5142-RS485 AC500-eCo V3 non-isolated EIA RS-485 serial communication option board supporting 9.6–115.2 kbit/s transmission and programmable industrial communication protocols.
Why Choose the ABB TA5142-RS485 RS-485 Serial Communication Option Board?
The ABB TA5142-RS485 is a compact non-isolated RS-485 serial communication option board designed to extend the communication capabilities of compatible ABB AC500-eCo V3 programmable logic controllers. It provides one EIA RS-485 serial interface for connecting the PLC to compatible industrial devices and serial networks.
Designed for the ABB AC500-eCo V3 platform, the TA5142-RS485 supports configurable communication speeds from 9.6 kbit/s to 115.2 kbit/s. Communication parameters are configured in software, while programmable protocol support enables applications including Modbus RTU, CAA SerialCom and CS31 bus communication.
The TA5142-RS485 is the non-isolated version of ABB's RS-485 option board and installs directly into a compatible PM50xx CPU option-board slot. A removable 5-pin spring terminal block with 3.50 mm pitch is supplied with the board, providing a compact integrated solution for adding RS-485 connectivity without a separate external communication converter.
Key Advantages
- Adds one EIA RS-485 serial interface to compatible ABB AC500-eCo V3 PLCs.
- Supports communication speeds from 9.6 kbit/s to 115.2 kbit/s.
- Programmable protocol support provides flexibility for different industrial serial applications.
- Supports applications using Modbus RTU, CAA SerialCom and CS31 bus communication.
- Communication parameters are configurable through software.
- Installs directly into the CPU option-board slot without requiring a separate external serial converter.
- Supplied with a removable 5-pin spring terminal block.
Key Features
- ABB AC500-eCo V3 serial communication option board.
- 1 × EIA RS-485 serial interface.
- Non-isolated RS-485 interface.
- 9.6–115.2 kbit/s configurable transmission rate.
- Serial communication parameters configurable through software.
- Supports programming or data exchange operating modes.
- Programmable communication protocol.
- Suitable for Modbus RTU and CAA SerialCom applications.
- Can be configured for CS31 bus communication.
- Powered through the internal CPU connection.
- Removable 5-pin spring/cable front terminal block supplied.
Flexible RS-485 Communication for AC500-eCo V3 PLCs
RS-485 is widely used in industrial automation because it provides a practical serial communication interface for connecting controllers and compatible field equipment. The ABB TA5142-RS485 adds a dedicated RS-485 interface to compatible AC500-eCo V3 CPUs, enabling serial communication to be integrated directly into the PLC system.
The interface is programmable through ABB Automation Builder and can be used for protocols such as Modbus RTU or applications developed with CAA SerialCom. ABB also supports use of the RS-485 option board for CS31 bus configurations. The TA5142-RS485 is specifically the non-isolated model; applications requiring galvanic separation should use the corresponding isolated TA5142-RS485I variant.
Typical Applications
- Modbus RTU industrial communication.
- CS31 bus communication.
- Variable speed drive communication.
- Industrial HMI and operator interface integration.
- Energy meter and instrumentation communication.
- Serial sensor and field-device networks.
- Custom serial communication using CAA SerialCom.
- OEM control panels using ABB AC500-eCo V3 PLCs.
Technical Specifications
| Manufacturer | ABB |
|---|---|
| Series | AC500-eCo V3 |
| Model | TA5142-RS485 |
| ABB order code | 1SAP187300R0003 |
| Product type | RS-485 serial communication option board |
| Number of serial interfaces | 1 |
| Serial interface standard | EIA RS-485 |
| Isolation | Non-isolated |
| Transmission rate | 9.6–115.2 kbit/s |
| Serial interface parameters | Software configurable |
| Operating modes | Programming or data exchange |
| Protocol | Programmable |
| Supported applications | Modbus RTU / CAA SerialCom / CS31 bus |
| Interface connector | 5-pin terminal block |
| Terminal type | Spring/cable front |
| Terminal pitch | 3.50 mm |
| Compatible CPUs | ABB AC500-eCo V3 PM50xx |
| Internal power supply | Via internal CPU connection |
| Additional CPU supply current consumption | max. 25 mA from 24 V DC CPU supply |
| Configuration software | ABB Automation Builder |
| Weight | approx. 15 g |
| HS Code | 85389091 |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB TA5142-RS485 used for?
The TA5142-RS485 is a non-isolated RS-485 serial communication option board used to add one configurable EIA RS-485 interface to compatible ABB AC500-eCo V3 programmable logic controllers.
What communication speed does the TA5142-RS485 support?
The TA5142-RS485 supports configurable transmission rates from 9.6 kbit/s to 115.2 kbit/s.
Is the TA5142-RS485 galvanically isolated?
No. The TA5142-RS485 is the non-isolated RS-485 variant. ABB also offers the TA5142-RS485I for applications requiring an isolated RS-485 interface.
Does the TA5142-RS485 support Modbus RTU?
Yes. Its protocol is programmable through ABB Automation Builder, and ABB specifies the interface for applications including Modbus RTU and CAA SerialCom.
Which ABB PLCs can use the TA5142-RS485?
The TA5142-RS485 is designed for compatible ABB AC500-eCo V3 PM50xx CPUs equipped with an available option-board slot for serial communication expansion.
Reliable RS-485 Communication from ABB
The ABB TA5142-RS485 provides compatible AC500-eCo V3 controllers with a compact non-isolated EIA RS-485 interface, supporting configurable 9.6–115.2 kbit/s serial communication and programmable protocols for industrial automation networks.
