User Guide

ManualsBrandsesera ManualsSerial Coupleresera RS232 eBus to Serial Coupler

Art. No. 12003

ESERA GmbH. Errors and technical modification subject to change.  ESERA GmbH 2023

www.esera.de 12003 V4.0 R1.3 Manual Page 1 of 5

User Guide

eBus Coupler Serial (RS232)

• eBus transceiver for writing and reading eBus

data (physical layer OSI 1)

• Serial RS232 interface

• Galvanic isolation for eBus and

the PC interface via optocoupler

• eBus input reverse polarity protection

• LED indicators for “Power”, “eBus Power” and

“Activity”

• Top hat rail case for switchboard assembly

• Screw terminals for eBus connection

• Easy switchboard installation

• Color of Coupler case: green

1 Introduction

Before you start assembling the eBus Coupler Serial and put the device into operation, please read this assembly

and operating instructions carefully to the end, especially the section referring to the safety notes.

2 Product Description

The eBus Coupler Serial provides read and write access to the eBus network. Thus with appropriate software it is

possible to analyze all of your home heating system data and provide it with new operating data.

The eBus Coupler Serial provides galvanic isolation among the eBus and the PC serial interface. A built-in

software filter ensures that only payload data will be transmitted via Ethernet. This filter significantly reduces the

load of data being transferred.

The eBus interface is reverse polarity protected. Therefore it is not necessary to observe signal polarity when

connecting to the eBus. The case of the Coupler is designed for mounting in a control cabinet.

The eBus coupler is equipped with an RS232 serial interface for transferring data to and from a computer. A

software-based virtual serial interface (COM-Port) is available at all times. An appropriate driver is available for

download at the download section on our webpage (https://www.esera.de/shop/en/products/ebus/142/ebus-

coupler-to-ethernet).

LEDs at the front panel of the Coupler indicate “PWR” (eBus input power) and “DATA” (eBus activity). A green

LED at the eBus terminal indicates the availability of an eBus. An external power adapter (which is not included in

the scope of delivery) is required to operate the eBus Coupler. We recommend the use of one of our 12V or 24V

DIN rail power supplies.

Summary of content (5 pages)

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Art. No.
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3 Technical Specifications eBus Interface Interfaces: Data rate: Switch threshold: Input / Connection: eBus voltage: Transreceiver (read and write) for eBus conforming to the “eBus Specification, physical Layer OSI1 V1.3.1 last revised 3/2007, eBus Interest Group“ Serial, 2400 Baud, 8-bit UART mode (RS232, 2400, 8,N,1) Adjustable via trimmer; adjustment range: 7-14V Low active bus: HIGH (1) => 15 - 24 VDC, LOW (0) => 9 - 12 VDC 2-pole, bipolar input (marking: A and B) Screw terminals (up to 2.
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Art. No. 12003 6 Software The eBus Coupler Serial operational settings are: 2400 Baud, 8 data bits, no parity and 1 stop bit. Evaluation software is not included in the scope of delivery for this product. In order to evaluate eBus data we recommend the IP-Symcon Forum (http://www.ipsymcon.de/wiki/EBus_Adapter) or the eBus Wicki page of eBus Friends (https://www.dokuwiki.org/dokuwiki#). We also recommend the eBus integration for FHEM (http://www.fhem.de) or the eBus service for Linux.
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9 Operating conditions The operation of the assembly group can take place only on condition of observing the required voltage and the ambient conditions. The operating position of the device is irrelevant. The device is meant to be used in dry areas free of dust. Should condensed water build up within the sensor, an acclimatization period of at least 2 hours must be met. The components can be operated only under the supervision of an electrically skilled person.
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Art. No. 12003 14 Warranty ESERA GmbH guarantees that the goods sold at the time of transfer of risk to be free from material and workmanship defects and have the contractually assured characteristics. The statutory warranty period of two years begins from date of invoice. The warranty does not extend to the normal operational wear and normal wear and tear.