Flowserve NRS 1-42 User Manual
NRS 1-42
Installation Instructions 810373-03
Level Switch Type NRS 1-42
1
Contents
Page
Important Notes
Usage for the intended purpose ...................................................................................... 7
Safety note ......................................................................................................................7
Warning ........................................................................................................................... 7
Explanatory Notes
Scope of supply ..............................................................................................................8
System description .......................................................................................................... 8
Function .......................................................................................................................... 8
Technical data .................................................................................................................9
Installation
NRS 1-42 ....................................................................................................................... 10
Example of installation ..................................................................................................27
Wiring
Wiring diagram ................................................................................................3, 4, 10, 11
Basic Adjustment
CAN bus ........................................................................................................................ 12
Node ID .........................................................................................................................12
Factory setting...............................................................................................................12
Adjust sensitivity ...........................................................................................................13
Operation
On-off control ................................................................................................................ 14
Switchpoint 1 ................................................................................................................. 14
Switchpoint 2 ................................................................................................................. 14
Switchpoint 3 ................................................................................................................. 14
Switchpoint 4 ................................................................................................................. 14
Alarm ............................................................................................................................. 15
High-level (
Low-level (MIN) alarm ..................................................................................................... 15
Relay test high level / low level.......................................................................................15
System Malfunctions
Systematic analysis of malfunctions 1 – 3 ............................................................. 16–20
Malfunctions
Fault-finding list for troubleshooting ........................................................................21, 22
Annex
Factory set default node IDs .........................................................................................23
Assigning/changing node IDs .................................................................................23, 24
Declaration of conformity .............................................................................................. 25
2
MAX) alarm ...................................................................................................15
Wiring Diagram
Twisted pair cable
Twisted pair cable
Fig. 1
Relay Relay Relay Relay
1234
Fill/
MAX MIN
discharge
control
Terminating resistor
ΩΩ
120
Ω
ΩΩ
Control terminal
URB 1
CEP
1)
Level switch
NRS 1-42
Power supply CAN data line
Terminating resistor
120 Ω
1)
CEP = central earthing point
Fig. 2
Controller
. . .
Level electrodes
NRG 16-42
Terminating resistor
120 Ω
Electrodes
...
3
Wiring Diagram
Discharge control – Pump OFF at low level
Twisted pair cable
Twisted pair cable
Terminating resistor 120
Fig. 3
Fill control – Pump OFF at high level
ΩΩ
Ω
ΩΩ
Pump contactor
Fig. 4
4
Twisted pair cable
Twisted pair cable
Terminating resistor 120
Pump contactor
ΩΩ
Ω
ΩΩ
Parts Drawing
1
Fig. 5
7 6 5 4 3 2
A
A
B
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 1-42 in conjunction with level electrode NRG 16-42 only for
level signalling in liquid and electrically conductive fluids.
Safety note
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.
Warning
The terminal strip of the NRS 1-42 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 1-42
1 Level switch type NRS 1-42 (plug-in unit in plastic case with terminals)
1 Terminating resistor 120 Ω
1 Installation manual
System description
Use level switch type NRS 1-42 together with level electrode type NRG 16-42 for
level monitoring. The level switch has the following functions:
■
Four levels with one switchpoint each.
■
High-level alarm, low-level alarm, pump ON, pump OFF with one switchpoint each.
The level data are transferred from the electrode NRG 16-42 to the level switch via a
CAN bus.
Function
At regular intervals the level electrode NRG 16-42 sends a data telegram to the level
switch NRS 1-42. 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 of the level switch 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 (fail-safe position).
Additional functions, such as (de-)energizing delay times of the output relays
(1 to 25 seconds), can be adjusted with the control terminal and display unit
URB 1.
8
Technical data
Type approval n°
TÜV · WR 98-399
Input/ Output
Interface for CAN bus to DIN ISO 11898 CANopen
Output – voltage supply for electrode
Power supply 24 V DC, short-circuit protected
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 / 47 nF)
Relay de-energizing delay
Output “
MIN”, “MAX” 3 s
Indicators and adjustors
4 pushbuttons for parameterisation/"TEST"
1 red LED for switchpoint “
1 red LED for switchpoint “
HIGH LEVEL” (MAX)
LOW LEVEL” (MIN)
2 green LEDs for switchpoints “pump ON” and “pump OFF”
1 green LED “
1 red LED “
POWER”
BUS FAU LT”
1 ten-pole code switch, 7 poles for node ID and 3 poles for baud rate settings
Sensitivity
Range 1: ≥ 10 µS/cm
Range 2: ≥ 0.5 µS/cm
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
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