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8.1 INTERFACE 848 DIAGRAM BUS CONNECTION in CURRENT LOOP
Using interface type 848 4 groups of max. 4 x 348’s may be connected in CL mode.
Example of 1 group van 4 connected 348’s upon one of the 4 input connectors of an 848 interface:
348 348 348 348
Con. 32 Con. 32 Con. 32 Con. 32
Advised cable type: metal foil shielded, twisted pairs, low capacity
To prevent for unwanted earth loops, sometimes it is better not to connect
the cable shielding to pins 1 and 6 ground of the 848.
Con. 3, 4, 5, 6
848
Since the 348’s in discontinuous sending mode can be numbered from 1 to 15 only, it is not possible to connect
more than 15 x 348’s to the interface 848.
It is advised to spread the 348’s proportional over the 4 available input connectors of the interface 848.
The output of interface 848 may be set as RS232 V24 or as Current Loop by the way of connecting the cable.
Manual 348-2 V 3.1 Page 28 01-06-2007
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