ABB 23OK24 Fibre optic coupler Serial communications

Fiber optic coupler for glass fiber optic cables with an emission wavelength of 820 nm Fiber optic connection with bayonet socket BFOC/2.5 (IEC-SC86B)

Optical isolation of the RTU560 bus

Suitable for use as star coupler for RS-485 and RS-232 buses

IEC 60870-5-103 device interface

Front panel connector for 2 optical lines

Fiber optic coupler 23OK24

The fiber optic coupler 23OK24 is suitable for the RTU560. the module is used to transmit data via 2 independent optical links (receive and transmit).

Fiber optic cables are insensitive to inductive and capacitive interference as well as to potential differences between the two data communication devices.

In critical environments or when potential isolation is required, fiber optic cables can be used to bridge across distances. With 200 μm fiber optic cables, the maximum distance is up to 2600 meters.

The module can be used to convert the receive and transmit data signals of the following electrical interface standards to fiber optic signals:

- RTU560 SPB I/O bus

- RS-485 bus

- RS-232 C

The fiber optic coupler 23OK24 can be connected to the RTU500 series coupler 560FOC40. the RTU520 I/O adapter 520ADD03 R0002 and the RTU511 I/O adapter 23AD64 R0002.

Features

Therefore suitable for the following applications:

- Replaces the RTU560 electrical SPB I/O bus between station subracks

- Coupling of digital protective relays with fiber-optic interface according to EC60870-5-103

- Point-to-point connection

- Multi-point connection

- In the bus link

- Optical amplifier for fiber optic link extension

- Connection to any other device with fiber optic interface

Module 23OK24 occupies a slot in the RTU560 chassis. It is directly coupled to the RTU560 SPB I/O bus via the backplane.

The module can be used for 820 nm glass fiber optic cables and is equipped with a locking socket type BFOC/2.5 bajonet according to IEC 874-10.

The fiber optic cable connection is made via four locking sockets on the front panel.

The maximum distance between the two 23OK24s depends on

- Type of fiber optic cable

- Number of fiber optic pieces

The maximum transmission rate is limited only by the transmission rate of the electrical interface. The interface standard and the output optical power can be selected and configured via jumpers.

The marking condition is defined as “on” or “off”.

The optional time supervisory control (TSV) switches off the receiver if the received signal is valid for more than 16 ms.

The 23OK24 module can replace the RTU560 SPB I/O electrical bus between subrack groups or completely.

The actual configuration can be adapted to local conditions. 23OK24 can connect subracks in a star configuration or in a multi-point T configuration.

The 23OK24 modules can be connected directly to digital protective relays via point-to-point links, multipoint links or bus links.

A 23OK24 module can also be used as an optical amplifier without additional wiring.

The six light-emitting diodes on the front panel indicate the following operating status:

- Tx 1/2 transmit data active

- Rx 1/2 Receive data active

- ST 1/2 Time-of-occurrence monitoring (TSV)