RFL Communications 21 Sub-MUX Instrukcja Użytkownika Strona 23

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RFL SMX3/40 Page 23 of 24 Issue 2.02
User Manual
07 May 2009
Example 6: Factory Configuration
In this configuration:
Port 1, channel A, protection circuit, transparent
Port 2, channel B, 2400 baud, 8 bit
Port 3, sharing channel B to provide additional V24 ports
Port 4, channel D, 2400 baud, 8 bit
Each link runs at its own clock speed. SCADA data may be transferred from B1 to B2
at V24 level by effectively being re-transmitted from the SCADA equipment. Only
possible on a well disciplined system where only on terminal transmits at once.
DIP Switch Settings for all units
8 7 6 5 4 3 2 1
SW1 0 0 0 0 0 1 0 0
SW2 0 1 0 0 1 0 0 1
SW3 0 1 0 0 1 0 0 1
SW4 0 1 0 0 1 0 1 1
SW5 0 0 0 0 0 0 0 1
SW6 0 0 0 0 1 1 1 0
Port 1 Protection
Ports 2-4 V24
Substation A Substation B Substation C
BT X21 or other unsynchronised X21 link
C1 B2B1A2
Port 1 Protection
Ports 2-4 V24
Example installation – Protection plus SCADA network
SCADA Equipment
BT X21 or other unsynchronised X21 link
Port 1 Protection
Ports 2-4 V24
Port 1 Protection
Ports 2-4 V24
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