Emerson Rosemount 56, Instruction Manual

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112 Profibus Communications
Section 12: Profibus Communications Instruction Manual
April 2017 LIQ-MAN-56
3. Remove the 4-lead terminal block which is installed on the Profibus slide-in board. This
photo shows the 4-lead terminal block installed onto the board:
4. Wire the two leads of the Profibus cable (red and green) to the A and B positions of the
4-lead removable terminal block. A #0 Philips head screw driver is required to open and
close the terminal posts on the terminal block. The lead positions are labeled on the
Profibus card (A and B) to assist in wiring.
Note: For successful communication using standard Profibus cable:
The Green color lead must be wired to lead position A (RxD/TxD-N).
The Red color lead must be wired to lead position B (RxD/TxD-P).
The VP and DGND (digital ground) positions are used to a power bus terminator if required.
Make sure the Profibus cable is properly prepared. Unshielded wire leads can lead to
poor signal integrity from the Profibus device to the Master
5. After wiring the Profibus cable to the terminal block, slide the wired 4-lead terminal
block onto the 4 pins protruding from Profibus
board on the left side.
Photo shows the 4-lead terminal block properly
wired to the Profibus board and installed onto the
board.
Note: the Profibus cable must be directed
downwards. The Profibus board can be partially or
fully removed to allow easy insertion of the 4-lead
terminal block onto the Profibus board.
6. Ensure that the 10-lead ribbon cable is properly
connected from the Profibus board to the left-
most connector of the 3 10-pin shrouded
connectors on the right side of the main circuit
board.
Once power is wired to the unit (as shown in
photo), the Profibus-configured 56 is ready for
power up and communication on a Profibus
network.
FIGURE 12-3. Profibus board showing
removable 4-lead terminal block
FIGURE 12-4. 4-Lead Terminal Block
FIGURE 12-5. Complete Profibus
board installation with ribbon
cable attached.
CAUTION