Presetting Manual BG41/BG42/BG43
5-14 Rev. 99/49
External voltage supply via
the 25-pole SubD socket
The plug connectors J1 and J2 are to be found on the 20mA module
and the combination module and can be switched to external and
internal voltage supply. The plug bridge M24 (J1) switches the
grounding conductor, the plug bridge P24 (J2) switches the 24 V. For
external voltage supply of the building block, both must be plugged
into the position "EXT" (external voltage supply).
On the interface building block the plug connector J6’s plug
bridges must be plugged into the "parking position"
(state at delivery) when receiving its voltage supply externally.
Parking position of the plug
connector J6
The connector field J6 is responsible for the feeding through of the
24V supply from the back plane bus. If the building block is
externally supplied, it is imperative that the bridges are switched into
the position as shown. The external voltage must be applied to the
pins 11 (+24 V) and 22 (earth) of the 25-pole sub-D plug.
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