Binary input/output module (IOM)

The binary input/output module is used when only a few input and output channels are needed. 

The ten standard output channels are used for trip output or any signalling purpose. 

The two high speed signal output channels are used for applications where short operating time is essential. 

Eight optically isolated binary inputs cater for required binary input information.

mA input module (MIM)

The milli-ampere input module is used to interface transducer signals in the –20 to +20 mA range

from for example OLTC position, temperature or pressure transducers.

The module has six independent, galvanically separated channels.

Optical ethernet module (OEM)

The optical fast-ethernet module is used to connectan IED to the communication buses 

(like the station bus) that use the IEC 61850-8-1 protocol. 

The module has one or two optical ports with ST connectors.

Serial SPA/IEC 60870-5-103 and LON