communication module (SLM)

The optical serial channel and LON channel module is used to connect an IED to the communication that use SPA,

 LON, or IEC60870–5–103. 

The module has two optical ports for plastic/plastic, plastic/glass, or glass/glass.

Line data communication module (LDCM)

The line data communication module is used for binary signal transfer. 

Each module has one optical port, one for each remote end to which the IED communicates.

Alternative cards for Long range (1550 nm single mode), Medium range (1310 nm single mode) and

Short range (900 nm multi mode) are available.

GPS time synchronization module (GSM)

This module includes the GPS receiver used for time synchronization. 

The GPS has one SMA contact for connection to an antenna.

Transformer input module (TRM)

The transformer input module is used to galvanically separate and transform the secondary currents and voltages generated by the measuring transformers. 

The module has twelve inputs in different combinations.

High impedance resistor unit

The high impedance resistor unit, with resistors for pick-up value setting and a voltage dependent

resistor, is available in a single phase unit and a three phase unit. 

Both are mounted on a 1/1 19 inch apparatus plate with compression type termnals.