Wiring, Installation – Flowserve NRS 1-40 User Manual
Page 9
9
Wiring
UNITRONIC
®
is a registered trademark of LAPP Kabelwerke GmbH, Stuttgart
Note
■
If an external measuring pot is used, each level electrode type
NRG 16-40 requires one switching controller NRS 1-40 and one
GESTRA monitoring unit SRL 6.
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 25 and 26 for more
details.
Installation
NRS 1-40
Installation on mounting rail
1. Clip switching controller onto mounting rail 35 x 15 mm
(DIN EN 50022):
2. Align switching controller, see Fig. 11, Fig. 12
Tool
■
Screwdriver (5.5/100)
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 power consumption of the 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).
8
S
9
S
0
1
S
e
t
a
r
d
u
a
B
h
t
g
n
e
l
e
l
b
a
C
s
r
i
a
p
f
o
r
e
b
m
u
N
m
m
[
e
z
i
s
r
o
t
c
u
d
n
o
c
d
n
a
2
]
F
F
O
N
O
F
F
O
s
/
t
i
B
k
0
5
2
m
5
2
1
4
3
.
0
x
2
x
2
g
n
i
t
t
e
s
y
r
o
t
c
a
F
N
O
N
O
F
F
O
s
/
t
i
B
k
5
2
1
m
0
5
2
5
.
0
x
2
x
2
F
F
O
F
F
O
N
O
s
/
t
i
B
k
0
0
1
m
5
3
3
5
7
.
0
x
2
x
2
N
O
F
F
O
N
O
s
/
t
i
B
k
0
5
m
0
0
5
n
o
t
n
e
d
n
e
p
e
d
,
t
s
e
u
q
e
r
n
o
n
o
i
t
a
r
u
g
i
f
n
o
c
s
u
b
F
F
O
N
O
N
O
s
/
t
i
B
k
0
2
m
0
0
0
1
N
O
N
O
N
O
s
/
t
i
B
k
0
1
m
0
0
0
1