When the SLM connectors are viewed from the rear side of the
IED, contact 4 is in the topmost position and contact 1 in the lowest
position.
22.2.10.3 Technical data
SEMOD117454-1 v1
M12589-1 v4
Table 638: SLM – LON port
Quantity Range or value
Optical connector Glass fiber: type ST
Plastic fiber: type HFBR snap-in
Fiber, optical budget Glass fiber: 11 dB (1000m/3000 ft typically *)
Plastic fiber: 7 dB (10m/35ft typically *)
Fiber diameter
Glass fiber: 62.5/125 mm
Plastic fiber: 1 mm
*) depending on optical budget calculation
SEMOD117441-2 v5
Table 639: SLM – SPA/IEC 60870-5-103/DNP3 port
Quantity
Range or value
Optical connector Glass fiber: type ST
Plastic fiber: type HFBR snap-in
Fiber, optical budget Glass fiber: 11 dB (1000m/3000ft m typically *)
Plastic fiber: 7 dB (25m/80ft m typically *)
Fiber diameter
Glass fiber: 62.5/125 mm
Plastic fiber: 1 mm
*) depending on optical budget calculation
22.2.11 Galvanic RS485 communication module
SEMOD174899-1 v1
22.2.11.1 Introduction
SEMOD158664-5 v3
The Galvanic RS485 communication module (RS485) is used for DNP3.0 and IEC
60870-5-103 communication. The module has one RS485 communication port.
The RS485 is a balanced serial communication that can be used either in 2-wire or
4-wire connections. A 2-wire connection uses the same signal for RX and TX and
is a multidrop communication with no dedicated Master or slave. This variant
requires however a control of the output. The 4-wire connection has separated
signals for RX and TX multidrop communication with a dedicated Master and the
rest are slaves. No special control signal is needed in this case.
Section 22 1MRK 505 394-UEN A
IED hardware
840 Line differential protection RED650 2.2 IEC
Technical manual
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