A4.2.1.1.2 Optical Interface
[✓] Glass fiber
[✓] Plastic fiber
[✓] F-SMA connector
[ ] BFOC/2.5 connector
A4.2.1.1.3 Transmission Rate
[✓] 9600 bit/s
[✓] 19200 bit/s
A4.2.1.2 Link Layer
There are no selection options for the link layer.
A4.2.1.3 Application Layer
A4.2.1.3.1 Transmission Mode for Application Data
Mode 1 (least significant octet first) as defined in clause 4.10 of IEC 60870‑5‑4 is
used exclusively in this companion standard.
A4.2.1.3.2 Common Address of ASDU
[✓] One COMMON ADDRESS of ASDU (identical to the station address)
[ ] More than one COMMON ADDRESS of ASDU
A4.2.1.3.3 Selection of Standard Information Numbers in Monitor Direction
System Functions in Monitor Direction
INF Description
[✓] <0> End of general interrogation
[✓] <0> Time synchronization
[✓] <2> Reset FCB
[✓] <3> Reset CU
[✓] <4> Start / restart
[ ] <5> Power on
P634 A4 Telecontrol Interfaces
A4-10 P634/EN M/R-42-A // P634‑311‑653
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