| Transmission | uni- | bidirectional |
|---|---|
| Fibre optic connection | LC |
| Fibre type | Multimode | Singlemode |
| Optical range | up to 80 km (dep. on SFP module) |
| Digital signals (24V DC) | 4 |
| Signal delay (Latency) | ca. 1.5 ms |
| Error monitoring | LED, relay, outputs |
| Power supply | 10...28 V DC |
| Dimensions (W x H x D) | 22.5 x 100 x 127 mm |
With the I/O-system ELC-4, a maximum of 4 digital signals (e.g. switching, control, clock, synchronous or fault signals) can be transmitted unidirectionally or bidirectionally over fibre optic cables (FO).
Depending on requirements, the devices can be equipped with various SFP modules for different fibre optic types (singlemode up to 80km or multimode 2km). Either two transceivers or one transmitter and one receiver are required for each system.
The ELC-4 series therefore guarantees interference-free and fast data transmission in harsh industrial environments and in the field. The absolute potential separation means that problems that can occur due to potential carry-over, interference voltages, etc. are fundamentally avoided.
A chain or ring topology can also be realised with the ELC-E4D with optical feed-through or the ELC-SE4 (see examples in the connection plan).
The I/O-system ELC-4 works according to the plug-and-play principle. Neither software nor complex settings are required
The input signals are recorded and transmitted 1:1 to the remote station. The ELC-SE4, ELC-E4 or ELC-E4D devices also monitor the reception of the valid transmission protocol and each contain a relay contact, which can be used as a fault signalling contact in addition to the visual signalling by the red LED and the drop of the outputs to 0V voltage level. In the event of a fault, the NO contact opens (intrinsically safe even in the event of a power failure). The switching behaviour of the relay contact can also be changed via an internal jumper (contact closed in the event of a fault).
The ELC-E4D receiver enables a chain connection of receivers by passing the optical signal, which synchronously outputs the input signals of the transmitter. In this way, synchronisation signals can be sent to all connected receivers (example: flashing signal for traffic control technology).
If, for example, an ELC-SE4 is used as transmitter, the chain could be closed as a ring and it could be monitored at the starting point. In this way, failures (e.g. fibre breakage or failure of a receiver in the chain) can be detected immediately.
© elseco GmbH 2025
