Flowserve NRS 2-40 User Manual
NRS 2-40
Installation Instructions 810371-02
Level Switch Type NRS 2-40
1
Contents
Page
Important Notes
Usage to the intended purpose .......................................................................................7
Safety note / Danger.......................................................................................................7
Explanatory Notes
Scope of supply ..............................................................................................................8
System description .........................................................................................................8
Function ..........................................................................................................................8
Technical data .................................................................................................................9
Installation
NRS 2-40 ...................................................................................................................... 10
Example of installation ................................................................................................. 29
Wiring
Wiring diagram ......................................................................................................3, 4, 11
Basic Adjustment
CAN bus........................................................................................................................12
Node ID .........................................................................................................................12
First / second control equipment ..................................................................................12
Factory setting ..............................................................................................................13
Commissioning
NRS 2-40 ...................................................................................................................... 14
Control range ................................................................................................................ 14
Establish control range............................................................................................15, 16
Establish switchpoints within adjusted control range ....................................................16
Establish switchpoints ........................................................................................... 16 – 19
Operation
Normal operation ..........................................................................................................19
Alarm ............................................................................................................................. 19
High-level alarm ............................................................................................................19
Low-level alarm ............................................................................................................. 19
Relay test high/low (
System Malfunctions
Systematic fault finding procedure ................................................................................21
Analysis of system malfunctions 1 – 4 ....................................................................22–24
Operation Malfunctions
Fault-finding list for troubleshooting ........................................................................ 25, 26
Annex
Factory set default node IDs .........................................................................................27
Assigning / changing node IDs ................................................................................27, 28
Declaration of conformity .............................................................................................. 29
2
MAX/MIN) level .................................................................................20
Wiring Diagram
Relay Relay Relay Relay
1234
Fill/
MAX
discharge
control
MIN
Seite
Paired cable
Paired cable
Fig. 1
Control terminal
URB 1
*) CEP = central earthing point
Level switch
NRS 2-40
CEP*)
Power supply CAN data line
Terminating resistor
120 Ω
Fig. 2
Controller
. . .
Potentiometer
Terminating resistor
ΩΩ
120
Ω
ΩΩ
Level electrodes
NRG 26-40
Terminating resistor
120 Ω
optional output
for actual value
4-20 mA
Electrodes
...
3
Wiring Diagram
Discharge control –
Pump OFF at low level (MIN)
Pump contactor
Paired cable
Paired cable
Fig. 3
Potentiometer
Terminating resistor
ΩΩ
120
Ω
ΩΩ
Fill control – Pump OFF at high level (MAX)
Paired cable
Paired cable
Fig. 4
Potentiometer
Terminating resistor
ΩΩ
120
Ω
ΩΩ
optional output
for actual value
4-20 mA
Pump contactor
optional output
for actual value
4-20 mA
4
Parts Drawing
1
Fig. 5
A
A B
3567
4
2
Fig. 6
5
Key
1
Indicator LEDs
Discharge control Fill control
LED 1 – switchpoint 1
LED 2 – switchpoint 2
LED 3 – switchpoint 3
LED 4 – switchpoint 4
2
LED “Bus status”
3
LED “Power”
4
Enter button / test mode
5
Decrease button
6
Increase button
7
Program button
8
Code switch, 10 poles
A
Terminal strip
B
Screws for terminal strip
High-level alarm High-level alarm
Pump ON Pump OFF
PUMP OFF Pump ON
Low-level alarm Low-level alarm
6
Important Notes
Usage for the intended purpose
Use level switch NRS 2-40 in conjunction with level electrode NRG 26-40 only for
liquid level monitoring and control.
Safety notes
The equipment must only be installed by qualified staff.
Qualified staff are those persons who – through adequate training in electrical
engineering, the use and application of safety equipment in accordance with
regulations concerning electrical safety systems, and first aid & accident
prevention – have achieved a recognised level of competence appropriate
to the installation and commissioning of this device.
Danger
The terminal strip of the NRS 2-40 is live during operation.
This presents the danger of electric shock.
Cut off power supply before fixing or removing the cover.
7
Explanatory Notes
Scope of supply
NRS 2-40
1 Level switch type NRS 2-40 (plug-in unit in plastic case with box terminals)
1 Terminating resistor 120 Ω
1 Operating manual
Description
Use level switch type NRS 2-40 in combination with level electrode type
NRG 26-40 for level monitoring. The level switch has the following functions:
■
Four liquid levels with one switchpoint each.
■
High-level alarm, low-level alarm, pump ON, pump OFF, with one switchpoint each.
■
Continuous level monitoring within control band defined by two preset limits.
■
Actual-value output 4-20 mA (optional)
■
Contact multiplication by connecting in parallel a second level switch NRS 2-40
without optional actual value output.
The level data are transmitted via CAN-bus from the electrode NRG 26-40 to the level
switch.
Function
At regular intervals the level electrode type NRG 26-40 sends a data telegram to the
level switch NRS 2-40. The data transfer is effected by means of a CAN bus according
to DIN ISO 11898. The transferred measuring data are then evaluated and assigned
to the manually adjusted switchpoints. To guarantee the correct functioning and safety
of the system the data transmitting cycle is constantly monitored by the level switch.
When the CAN bus line is interrupted the level switch sends a visual signal to indicate
a malfunction and the relays 1 and 4 will be instantaneously de-energized (alarm
position).
Additional functions, e.g. (de)-energizing delay times of the output relays
(1 to 25 sec.) can be adjusted with the control terminal and display unit URB 1.
8
Technical data
Type approval no.
NRS 2-40: TÜV · WR · 98-399
Input / Output
Interface for CAN bus to DIN ISO 11898 using CANopen
Output – voltage supply for electrodes
Power supply 24 V DC, short-circuit protected
Analogue output 4– 20 mA, load 500 Ω for display of actual value (optional).
4 volt-free relay contacts.
Max. contact rating with switching voltages of 24 V AC,
115 V AC and 230 V AC: 4 A resistive, 0.75 A inductive at cos ϕ 0.5
Max. contact rating with a switching voltage of 24 V DC: 4 A.
Contact material: silver, hard-gold plated
Interference suppression
Provide contactor with an external RC combination (100 Ω / 47nF)
Relay de-energizing delay
Output “MIN”, “MAX” 3 s
Indicators and adjustors
1 red LED for switchpoint “High level” (MAX)
1 red LED for switchpoint “Low level” (MIN)
2 green LEDs for switchpoints “PUMP ON” and “PUM OFF”
1 green LED “Power”
1 red LED “Bus fault”
1 ten-pole code switch for node ID and baud rate settings
4 pushbuttons
Supply voltage
230 V ± 10 %, 50/60 Hz
115 V ± 10 %, 50/60 Hz (option)
Power consumption
10 VA
Protection
Case: IP 40 to DIN ISO 60529
Terminal strip: IP 20 to DIN ISO 60529
Admissible ambient temperature
0 °C to 55 °C
Enclosure material
Front panel: polycarbonate, grey
Case: polycarbonate, black
Weight
Approx. 0.8 kg
9
Installation
NRS 2-40
Installation on mounting rail
1. Clip level switch onto mounting rail 35x 15 mm
(DIN EN 50022).
2. Align level switch, fig. 14, fig. 15
Tool
■
Screwdriver (5.5/100)
Wiring
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 measuring sensors dictates the conductor
size.
8S9S01SetarduaBhtgnelelbaC
FFO NO FFO s/tiBk052 m521
gnittesyrotcaF
NONOFFOs/tiBk521m0525.0x2x2
FFOFFONOs/tiBk001m53357.0x2x2
NOFFONOs/tiBk05m005
FFONONOs/tiBk02m0001
NONONOs/tiBk01m0001
sriapforebmuN
2
mm[ezisrotcudnocdna
]
43.0x2x2
notnedneped,tseuqerno
noitarugifnocsub
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).
When a max. cable length of 1000 m is desired, make sure to modify the baud
rate accordingly. Refer to page 27 and 28 for more details.
Wiring diagram
See wiring diagrams on pages 3 and 4.
UNITRONIC® is a registered trademark of LAPP Kabelwerke GmbH, Stuttgart
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