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NRS1-41
User Manual
28 pgs532.27 Kb0

Flowserve NRS1-41 User Manual

NRS 1-41
Installation Instructions 810830-00
Level Switch NRS 1-41
1
Contents
Page
Important Notes
Usage for the intended purpose .....................................................................................6
Safety note......................................................................................................................6
Explanatory Notes
Scope of supply ..............................................................................................................6
Technical data ................................................................................................................. 8
Installation
Example of installation .................................................................................................27
Wiring
Wiring diagram..................................................................................................... 3, 9 –11
Basic Adjustment
CAN bus........................................................................................................................11
Node ID .........................................................................................................................11
Factory setting ..............................................................................................................11
Commissioning
NRS 1-41 ....................................................................................................................... 12
Operation
NRS 1-41 ....................................................................................................................... 12
Test Cycle
NRS 1-41 ....................................................................................................................... 12
Alarm
High-level alarm............................................................................................................13
System Malfunctions
Fault analysis, system malfunctions 1 to 6........................................................... 14– 20
Operation Malfunctions
Fault finding list for troubleshooting..............................................................................21
Annex
Factory set default node IDs ........................................................................................ 22
Assigning/changing node ID...................................................................................23, 24
Declaration of conformity..............................................................................................26
2
Wiring Diagram
Twisted pair cable
Twisted pair cable
Fig.1
Control circuit make-up unit – uninterrupted –
Further equipment in control circuit
Note:
NRS 1-41 is the first equipment in the control circuit!
Terminals 26, 27, 28 and 30 must not be connected!
Photo-MOS output 24 V – 230 V AC/DC, 100 mA Instantaneous HW alarm, clocked malfunction signal.
Terminating resistor 120 Ω
Control terminal URB 1
Terminating resistor 120 Ω
Fig. 2
Level switch NRS 1-40
CEP
Voltage supply
Controller ...
Level electrode NRG16-40
CAN data line
Terminating resistor 120 Ω
Level sensor NRG...
3
Parts Drawings
Fig. 3
1
3 2567
4
A
9
8
A
B
Fig. 4
4
Key
Indicator LED
1
LED 1 Electrode 1
LED 2 Electrode 1
LED “Bus status”
2
3
LED “Power”
4
Enter / Test mode
5
Decrease
6
Increase
7
Program key
8
Two-pole code switch Note: Do not change factory setting!
9
Ten-pole code switch
A
Terminal strip
B
Screws for terminal strip
Alarm Malfunction
High-level alarm Multifunction
High-level alarm Multifunction
5
Important Notes
Usage for the intended purpose
Use level switch NRS 1-41 only in conjunction with GESTRA level electrode NRG 16-41, NRG 17-41 or NRG 19-41 for signalling high water level (max. alarm).
Safety Note
Installation must only be performed 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 safety device.
Danger
The terminal strip of the NRS 1-41 is live during operation. This presents the danger of electric shock. Cut off power supply before mounting or removing the terminal strips and housing lid.
Explanatory Notes
Scope of supply
NRS 1-41
1 Level switch NRS 1-41 (plug-in unit in plastic case with terminals) 1 Terminating resistor 120 Ω 1 Installation manual
6
Explanatory Notes – continued –
Description
The switching controller type NRS 1-41 is a self-monitoring high-water level limiter with periodic self-checking and monitoring feature of the output relay contacts designed to be used in conjunction with one level electrode type NRG 16-41, 17-41 or 19-41. The switching controller has the following function:
■ High-water level alarm with one level electrode
The equipment detects the max. water level (high-level limiter) and complies with the German regulations for use in steam and hot-water plants operating without constant supervision according to TRD 604, sheets 1 and 2 (72 hrs operation).
This item of electrical equipment complies with the Technical Regulations on Protection Circuits DIN VDE 0116 (prEN 50156).
The level data are transferred from the electrode NRG 1…-41 to the switching controller via CAN bus using the CANopen protocol. Only one high-level limiting system may be used per CAN-based network.
Function
At regular intervals the level electrode NRG 1…-41 sends a data telegram to the switching controller NRS 1-41. The data transfer is effected by means of a CAN bus according to ISO 11898. The transferred measuring data are constantly evaluated by the controller. A periodic self-checking routine tests every 3 seconds the integrity of the system and its safety functions, with a malfunction in the switching controller resulting in immediate boiler shutdown. When the CAN bus line and, consequently, the data transmitting cycle are interrupted, the controller sends a visual signal to indicate a faulty condition and the relays are instantaneously de-energized (fail-safe position).
The switching controller also facilitates user-friendly performance tests and detection/evaluation of malfunctions.
To guarantee the correct and safe functioning of the high-level limiter a min. electrical conductivity of 0.5 µS/cm at 25°C is required.
The relay de-energizing delay is normally set to 3 seconds at the factory but delays of 15 to 25 seconds are available on request.
Apart from the burner protection circuit there is also a separate Photo-MOS make contact output for remote indication.
The automatic self-testing routine of the switching controllers checks every 3 seconds their safety functions. The corresponding functions of the level electrodes will be tested by the electrode’s self-checking routine every 10 sec.
The malfunction information is updated with every self-test. If no faults have occurred the malfunction information will be deleted automatically. If faults persist the malfunction information remains stored.
As part of the automatic self-testing routine of the switchting controller, the switching-off of the output relays every 6 hrs is checked, too. If a fault is detected, the information on this malfunction will be saved accordingly.
7
Explanatory Notes – continued –
Technical Data
Type approval no.
TÜV · WB · 99-403 EG BAF-MUC 0202 103881 002
Input/Output
Interface for CAN bus to DIN ISO 11898 CANopen protocol
Output voltage supply for electrode
18 – 36, short-circuit protected
Output for control circuit
Power supply of level electrode: 24 V DC, short-circuit protected Two volt-free relay contacts, locally connected in series. Max. contact rating for switchting voltages 24 V AC/DC, 115 V AC and 230 V AC: 4 A resistive/inductive. Contact material: hard-gold plated
Interference suppression
Provide contactor with external RC combination (100 Ω / 47 nF)
Signal output
Photo-MOS output, instantaneous with high level, timed malfunction signal, max. contact rating for switching voltages 24 V AC, 115 V AC and 230 V AC/DC: 100 mA resistive
Relay de-energizing delay
Output “High-level alarm”, set to 3 sec. (standard); optional (for e. g. marine applications): 15 sec. or 25 sec.
Indicators and adjustors
4 pushbuttons “Parameterisation/TEST” 1 red LED for “High-level alarm electrode 1” 3 red LEDs “Multifunction” 1 red LED “Bus status” 1 green LED “Power” 1 ten-pole code switch, 7 poles for setting node ID, 3 poles for setting baud rate 1 two-pole code switch, without function. Do not change factory setting!
Internal self-checking routine
Every 3 seconds
Periodic testing of output relay contacts
Every 6 hours
Mains voltage
230 V +/– 10 %, 50/60 Hz, 115 V +/– 10 %, 50/60 Hz (optional)
Power consumption
10 VA
Sensitivity
≥ 0.5 µS/cm at 25°C
Protection
Enclosure: IP 40 to DIN EN 60529 Terminal strip: IP 2o to DIN EN 60529
Admissible ambient temperature
0 °C to 55 °C
Enclosure material
Front panel: polycarbonate, grey Enclosure: polycarbonate, black
Weight
Approx. 0.8 kg
8
Installation
NRS 1-41
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
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.
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 … 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.
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FFO NO FFO s/tiBk052 m521
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NONOFFOs/tiBk521m0525.0x2x2
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NOFFONOs/tiBk05m005
FFONONOs/tiBk02m0001
NONONOs/tiBk01m0001
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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.
UNITRONIC® is a registered trademark of LAPP Kabelwerke GmbH, Stuttgart
9
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