Wiring, Installation – Flowserve NRR 2-40 User Manual
Page 10
10
Wiring
UNITRONIC
®
is a registered trademark of LAPP Kabelwerke GmbH, Stuttgart
NRR 2-40
Installation
Installation on mounting rail
1. Clip level controller onto mounting rail 35 x 15 mm (DIN EN 50022).
2. Align level controller, fig. 19, 20.
Tool
■
Screwdriver (5.5/100)
Wiring diagram
See wiring diagrams on pages 3 and 4.
When a max. cable length of 1000 m is desired, make sure to modify the baud
rate accordingly. Refer to pages 28 and 29 for more details.
Note that screened multi-core twisted-pair control cable is required, e. g.
UNITRONIC
®
BUS CAN 2 x 2 x ...
2
or RE-2YCYV-fl 2 x 2 x ...
2
.
The baud rate (data transfer rate) dictates the cable length between the bus nodes
and the total current consumption of the measuring sensors dictates the conductor
size.
The baud rate is set via a code switch. Reduce baud rate if cable is longer than
specified in the table. Make sure that all bus nodes have the same settings.
To protect the switching contacts fuse circuit with 2.5 A (anti-surge fuse) or according
to TRD regulations (1.0 A for 72 hrs operation).
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