RFL Communications 21 Sub-MUX Bedienungsanleitung PDF herunterladen (Seite 19)

RFL SMX3/40 Page 19 of 24 Issue 2.02

User Manual

07 May 2009

Example 3: Concatenated links with one link connected to network master

clock and the second link synchronised to it, e.g. radio link:

Set Aggregate Direction for A2 and C1 to X21 port, and for B1 and B2 to Both

ports. Transmit and Receive data is presented at all ports. Only possible on a well

disciplined system where only one terminal transmits at once. This configuration

illustrates the network master clock sourced from the BT Kilostream link.

The timing on the radio link is synchronised with the master clock on the BT

link by configuring the SMX3/40 at B2 as DCE on the X21. This will output

timing onto the B2 – C1 link. B2 is the source of the timing signal for this link

which is received from B1 over the concatenation link. The SMX3/40 at C1 is

not configured to output signal timing on the X21 link.

Where Westica radios are deployed, these are configured as detailed in

section 7.6 Figure 7-2 of the Westica manual. Radio 1 (B2 end) is to be

configured as Ext Master DTE, Radio 2 at C1 end is configured as Slave

(DCE)

Cables Y are standard X21 ‘straight’ cables as following table.

SMX3/40 – Westica Connection cable – straight X21 (Cable Y)

SMX3/40 X21 (DCE) D15 pin-out Radio D37 pin-out

Note: Fit ribbon to X21 DCE header

Connection Pin Connection Pin

Txa 2 Txa 2

Txb 9 Txb 20

Rxa 4 Rxa 4

Rxb 11 Rxb 22

Ca 3 Ca 3

Cb 10 Cb 21

Ia 5 Ia 5

Ib 12 Ib 23

Sa 6 Sa 6

Sb 13 Sb 24

G 8

Screen grounded to shell Screen grounded to shell

Substation A Substation B Substation C

BT X21

Radio 1

Concatenation

C1 B2

V24

Port 2

V24

Port 2

V24

Port 2

V24

Port 2

Assume all V24 ports are allocated to aggregate channel B, baud rate 2400

Example installation – SCADA network

Radio 2

1 2 ... 14 15 16 17 18 19 20 21 22 23 24

Kommentare zu diesen Handbüchern

Keine Kommentare

RFL Communications 21 Sub-MUX Bedienungsanleitung Seite 19

Kommentare zu diesen Handbüchern