Installation, Wiring – Flowserve NRS1-41 User Manual
Page 9
9
Installation
NRS 1-41
Tool
Installation on mounting rail
1. Clip switching controller onto mounting rail 35 x 15 mm (DIN EN 50022).
2. Align switching controller, Fig. 9, Fig. 10
■
Screwdriver (5.5/100)
Wiring
UNITRONIC
®
is a registered trademark of LAPP Kabelwerke GmbH, Stuttgart
Note
■
If an external measuring pot is used, each level electrode type NRG
1…-41 requires one switching controller type NRS 1-41 and one
GESTRA monitoring unit SRL 6.
Note that screened multi-core twisted-pair control cable is required, e. g.
UNITRONIC
®
BUS CAN 2 x 2 x … mm² or RE-2YCYV-fl 2 x 2 x … mm².
The baud rate (data transfer rate) dictates the cable length between the bus nodes
and the total power consumption 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 above. Make sure that all bus nodes feature 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).
When a max. cable length of more than 125 m (up to 1000 m) is desired, make
sure to modify the baud rate accordingly. Refer to pages 23 and 24 for more
details.
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