GESTRA URB 1 User manual

1
EN
English
Operating Terminal & Display Unit
URB 1
Original Installation Instructions
81037507

2
Contents
Usage for the intended purpose ..............................................................................................................4
Safety note .............................................................................................................................................4
Attention.................................................................................................................................................4
LV (Low Voltage) Directive.......................................................................................................................4
EMC (Electromagnetic Compatibility).......................................................................................................4
ATEX (Atmosphère Explosible).................................................................................................................4
Important Notes
Page
Explanatory Notes
Scope of supply......................................................................................................................................5
Description .............................................................................................................................................5
Function ................................................................................................................................................ 6
System components ...............................................................................................................................6
Design....................................................................................................................................................6
URB 1...................................................................................................................................................13
Tools.....................................................................................................................................................13
Example of Installation..........................................................................................................................13
Key.......................................................................................................................................................13
Installation
Electrical Connection
Control cable ........................................................................................................................................14
Note .....................................................................................................................................................15
CAN bus voltage supply ........................................................................................................................15
Attention ..............................................................................................................................................15
Wiring diagram.....................................................................................................................................16
Key.......................................................................................................................................................16
URB 1.....................................................................................................................................................7
Name plate/marking ...............................................................................................................................8
Dimensions.............................................................................................................................................9
Technical Data
URB 1...................................................................................................................................................10
Key.......................................................................................................................................................12
Design
URB 1...................................................................................................................................................11
Key.......................................................................................................................................................12
Functional Elements

3
Applying mains voltage.........................................................................................................................21
Adjusting display contrast............................................................................................................... 21, 22
Changing factory set node ID of URB 1, adjusting / changing node ID of URB 1 ...............................23–25
Possibilities to display bus devices........................................................................................................25
Setting / changing node IDs of bus-based equipment .....................................................................26–29
Visual display / parameterisation of bus-based equipment..............................................................30–35
0 % to 100 % calibration for capacitance level monitoring...............................................................36–38
Calibrating the feedback potentiometer of an external control valve ...............................................39–42
Establishing switchpoints and proportional coefficient Xp................................................................43–46
Adjusting sensitivity range .............................................................................................................. 47, 48
Setting relay energizing times.........................................................................................................49–51
Adjusting conductivity controller .....................................................................................................52–63
Adjusting linear (LIN) temperature compensation ............................................................................64–66
Adjusting standard curve (NORM) temperature compensation.........................................................67–71
Enabling automatic (AUTO) temperature compensation................................................................... 72, 73
Disabling temperature compensation ............................................................................................. 74, 75
Contents – continued –
Commissioning Procedure
Page
Manual operation of an external control valve .......................................................................................76
Stand-by operation with the steam boiler disconnected ........................................................................77
Operation
Bus cable..............................................................................................................................................18
Node ID ................................................................................................................................................19
Factory setting......................................................................................................................................20
Establishing / changing node ID............................................................................................................20
Attention...............................................................................................................................................20
Code switch settings.............................................................................................................................20
Basic Settings
Systematic malfunction analysis...........................................................................................................78
Fault finding list for troubleshooting................................................................................................ 79, 80
System Malfunctions
Note on the Declaration of Conformity / Declaration by the Manufacturer .......................................81
Annex
Electrical Connection – continued –
CAN bus wiring diagram .......................................................................................................................17
Attention...............................................................................................................................................17
Note .....................................................................................................................................................18
Tools.....................................................................................................................................................18

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Important Notes
Usage for the intended purpose
Use operating terminal & display unit URB 1 only in conjunction with GESTRA Spector Bus systems
(CANopen).
Safety note
The equipment must only be installed and commissioned by qualified and competent staff. Retrofit-
ting and maintenance work must only be performed by qualified staff who – through adequate training
– have achieved a recognised level of competence.
The equipment meets the requirements of the Low Voltage Directive 2014/35/EU.
Attention
The name plate specifies the technical features of the equipment. Note that any piece of
equipment without its specific name plate must neither be commissioned nor operated.
LV (Low Voltage) Directive
According to the European Directive 2014/34/EU the equipment must not be used in potentially explo-
sive areas.
ATEX (Atmosphère Explosible)
The equipment meets the requirements of the EMC Directive 2014/30/EU.
EMC (Electromagnetic Compatibility)

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Scope of supply
URB 1
1 Operating terminal & display unit URB 1 (in plastic case)
2 Fixing screws for panel mounting
1 Installation & operating manual
Description
The URB 1 is a user-friendly operating terminal and display unit for GESTRA CAN bus systems.
The equipment makes retrieving and processing all standard functions of associated system
components very easy. The URB 1 uses the CANopen protocol. In addition, the URB 1 simplifies the
parameterisation procedure: The switchpoints, proportional band and response sensitivity can be
adjusted by means of the keypad regardless of the actual level. The energizing and de-energizing times
of the relays can be set individually for their respective switchpoints.
The following tables list the GESTRA systems that can be viewed by the URB 1.
Standard display Level Conductivity
NRS 140 NRS 141 NRS 142
NRS 240 NRR 240 LRR 140
Actual value (bar chart)   
Actual value (numerical)   
Switchpoint (symbol)    
High level alarm (electrode HW)    
Low level alarm (electrode LW)    
Manual/automatic operation   
Stand-by mode 
Unit [µS/cm], [ppm] 
Low level limit 
High level limit 
Alarm (warning triangle)  
Further display information Level Conductivity
NRS 140 NRS 141 NRS 142
NRS 240 NRR 240 LRR 140
Actual value (continuous)   
Switchpoints    
Setpoint  
Deviation  
Valve position  
Intermittent blowdown duration 
Intermittent blowdown interval 
Purging pulse 24 h 
Current CAN bus addresses  
Explanatory Notes

6
Explanantory Notes – continued –
System components
NRS 140
Level switch NRS 1-40
NRS 141
Level switch NRS 1-41
NRS 142
Level switch NRS 1-42
NRS 240
Level switch NRS 2-40
NRR 240
Level switch NRR 2-40
LRR 140
Conductivity switch LRR 1-40
Design
URB 1
Enclosure of insulating material with terminals for installation in control cabinets.
The terminals are accessible from the back.
External dimensions: 95 x 95 x 63
Function
The URB 1 communicates with other GESTRA system components via CAN bus, using the CANopen
protocol to DIN ISO 11898.
The URB 1 can also be used to operate and display further system components during operation.
nCapacitance level switch NRS 2-40 CANopen
nLevel controller NRR 2-40 CANopen
nConductivity level switch NRS 1-42 CANopen
nLow level limiter to TRD 604/EN NRS 1-40 CANopen
nHigh water limiter to TRD 604/EN NRS 1-41 CANopen
nConductivity controller and limiter to TRD 604/EN LRR 1-40 CANopen

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URB 1
Technical Data
Type approval
TÜV · XX-399 (level)
TÜV · WÜL · XX-007 (conductivity)
Software
Software version 311099.16
Input
Power supply 18V to 36V DC
Interface for CAN bus using CANopen protocol to DIN ISO 11898
Output
Interface for CAN bus using CANopen protocol to DIN ISO 11898
Indicators and adjustors
1 illuminated graphic display, resolution 128 x 64 pixels
5 pushbuttons
1 three-pole code switch for baud rate setting
Supply voltage
18 V to 36 V DC
Protection
Front panel: IP 54 to DIN EN 60529
Back: IP 00 to DIN EN 60529
Admissible ambient temperature
0 – 55 °C
Body material
Front panel: Aluminium with polyester membrane
Casing: Noryl GFN 2 SE 1, glass-fibre reinforced
Weight
Approx. 0.3 kg

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Technical Data – continued –
Name plate/marking
Fig. 1
IN/OUT:CAN-Bus+18V-36V DC
Tamb=55°C (131°F)
IP 54 (IP00)
Mat.-Nr.: 391769
TÜV.WR.XX-399
TÜV.WÜL.XX-007
S
CAN-
BUS
24V
DC
Betriebsanleitung
beachten!
See installation
instructions!
Voir instructions de
montage!
Bediengerät
Control unit
Appareil de contrôle
URB 1- V2
Münchener Str.77
D-28215 Bremen
Germany
GESTRA AG
ON
OFF
Baudrate
321
12345
_CLSCH+
{
}
311099.XX
XX.XX.20XX
URB1

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045%
3450 S/cm
S/cm
W
W
8
Technical Data – continued –
Dimensions
Fig. 2
63
95
95

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Design
URB 1
Fig. 3
9
8
7
8

11
Functional Elements
URB 1
Fig. 4 1
6
5432

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Design/Functional Elements – continued –
Key
1Program button for switching between operating mode and parameterisation mode
2Increase button
3Decrease button
4Enter button
5Manual / automatic button
6Illuminated LCD display, resolution 128 x 64 Pixel
7Code switch for baud rate setting
8Fixing screws for panel mounting
95-pole connector

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045%
3450 S/cm
S/cm
W
W
Tools
nScrewdriver (5.5/100)
Installation
URB 1
Panel mounting
1. Provide panel cut-out, dimensions: 92+0.8 x 92+0.8.
2. Install URB 1 using the fixing clips supplied with the equipment.
Fig. 5
Example of Installation
8 Fixing screw for panel mounting
Key
8
118
73

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Electrical Connection
Control cable
NRS, NRR, LRR, TRS, URB 1
To wire the equipment, multi-core twisted-pair control cable must be used for the bus line,
e. g. UNITRONIC®BUS CAN 2 x 2 x ... mm2or RE-2YCYV-fl 2 x 2 x ... mm2.
The baud rate (data transfer rate) dictates the cable length and size between the bus nodes. The total
power consumption must also be taken into consideration when selecting the conductor size. The total
power consumption is obtained from the number of bus nodes.
If the cable length between the steam boiler and the control cabinet exceeds 15 m, we recommend that
you fit a branching box that is resistant to electromagnetic interference (stock code 1501214) and use a
control cable with a larger conductor size for the distance to the control cabinet.
Set baud rate via code switch 7. Make sure that all bus nodes feature the same settings.
S 1 S 2 S 3 Baud rate Cable length Number of pairs
and conductor size [mm2]
OFF ON OFF 250 kBit/s 125 m 2 x 2 x 0.32
Factory setting
ON ON OFF 125 kBit/s 250 m 2 x 2 x 0.5
OFF OFF ON 100 kBit/s 335 m 2 x 2 x 0.75
ON OFF ON 50 kBit/s 500 m on request, depending on
bus configuration
OFF ON ON 20 kBit/s 1,000 m
ON ON ON 10 kBit/s 1,000 m
UNITRONIC® is a registered trademark of LAPP Kabelwerke GmbH, Stuttgart.

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Electrical Connection – continued –
Note
nThe specified max. baud rates and cable lengths are based on empirical values
obtained by GESTRA. In certain cases it may be necessary to reduce the baud rate in
order to ensure operational safety.
nThe type and design of the data cable has a strong influence on the electromagnetic
compatibility (EMC) of the equipment. Take special care when connecting the
equipment.
nIf you do not use the control cable assemblies connect the connectors and jacks for
the control cables as indicated in the assignment diagram for sensor plug-in unions.
CAN bus voltage supply
To ensure the troublefree operation of the CAN bus system make sure that the voltage supply for all bus
devices is sufficient.
Please use the following table to check the voltage supply of your bus system.
Control units with
voltage supply
Qty. xPower output per item = Sum
x6 W = W
Please enter data. Sum 1 = W
Sensor, transmitter, control
units, operating & display unit
URB 1
Qty. xPower consumption per item = Sum
x3 W = W
Operating & Display Unit
URB 2 x5 W =W
Please enter data. Sum 2 = W
If sum 2 exceeds sum 1 supply the CAN bus with 24 V DC coming from a separate and stabilized safety
power supply unit (e. g. SITOP Smart 24 V 2.5 A).
The power supply unit must be electrically isolated from dangerous contact voltages and must meet at
least the requirements on double or reinforced isolation acc. to DIN EN 50178 or DIN 61010-1 or
DIN EN 60730-1 or DIN EN 60950 (safe isolation).
The power supply unit must be provided with an overcurrent protective device in accordance with
EN 61010-1.
Attention
If a safety power supply unit (e. g. SITOP smart, 24 V, 2.5 A) is used for the voltage supply
of the CAN bus do not tap the supply voltage from the terminals 1 and 5 of the GESTRA
control devices.
SITOP smart is a registered trademark of Siemens AG, Munich

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Wiring diagram
Fig. 6
Electrical Connection – continued –
0
a
a
0 Terminating resistor 120 Ω, RES 1 or RES 2
a CAN bus line, twisted pair control cable
Key

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Electrical Connection – continued –
CAN bus wiring diagram
Fig. 7
CEP NRS, NRR,
LRR, TRS NRG, LRG NRG, LRG
RES 1
Attention
nWire equipment in series. Star-type wiring is not permitted!
nLink screens of control cables such that electrical continuity is ensured and connect
them once to the central earthing point (CEP). If equipotential bonding currents are
to be expected, for instance in outdoor installations, make sure that the screen is
separated from the central earthing point (CEP).
nTo protect the switching contacts fuse circuit with T 2.5 A or according to TRD
regulations (1.0 A for 72 h operation).
nIf two or more system components are connected in a CAN bus system, provide the
first and the last device with a terminating resistor of 120 Ω.
n Note that in a CAN bus network only one water-level limiting system may be used.
nDo not interrupt the CAN bus network during operation with one or more system
components!
If the CAN bus network is interrupted the safety circuit will be opened.
Before taking the CAN bus line from the terminal strip, make sure that all connected
system components are out of service.

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Electrical Connection – continued –
Tools
nScrewdriver for slotted screws, size 2.5, completely insulated according to VDE 0680
Note
nLink screen only to terminal S, ensure electrical continuity and connect it once to the
central earthing point (CEP).
n The loop resistance must be below 10 Ω.
n The rated voltage is indicated on the name plate.
nWhen switching off inductive loads, voltage spikes are produced that may impair the
operation of control and measuring systems. Provide connected contactors with RC
combinations, e. g. 0.1µF/100 Ω.
nEven in correctly wired systems high frequency interference caused by the installation
can lead to system outages and malfunction alarms. For more information please refer
to the fault-finding list in the section Malfunctions Troubleshooting.
Bus cable
All devices (level, conductivity) are interconnected via CAN bus. The CANopen protocol is used for the
data exchange between the equipment groups. All devices have an electronic address – the node ID.
The four-core bus cable serves as power supply and data highway for high-speed data exchange.
The CAN address (node ID) can be set between 1 – 123.
The URB 1 has already been configured at our works for operation with other GESTRA components and
can be used straight away without having to set the node ID.
If several identical systems are to communicate in a CAN bus network, set a different node ID for
each system (e. g. limiter, controller, etc).
If the length of the CAN bus cable exceeds 125 m change the settings of the code switch 7.
For more information on switch positions see Basic Settings Switch positions.
Basic Settings

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Node ID
Basic Settings – continued –
Water level limiter
NRS 1-40 NRG 16-40 (1) NRG 16-40 (2) Reserved Reserved
X X + 1 X + 2 X + 3 X + 4
1 2 3 Factory setting
Safety system for steam boilers with superheater
NRS 1-40.1 NRG 16-40 (1) NRG 16-40 (2) TRV 5-40 Limiter 4
X X + 1 X + 2 X + 3 X + 4
1 2 3 4 Factory setting
Safety system (e. g. hotwater generating units)
NRS 1-40.1 NRG 16-40 (1) NRG 16-40 (2) Limiter 3 Limiter 4
X X + 1 X + 2 X + 3 X + 4
1 2 Factory setting
Safety system (e. g. hotwater generating units)
NRS 1-40.2 *) TRV 5-40 (1) *) TRV 5-40 (2) *) Limiter 3 Limiter 4
X X + 1 X + 2 X + 3 X + 4
6 7 8 9 10 Factory setting
TRS 5-40 (1) *) TRS 5-40 (2) *)
X + 1 + 90 X + 2 + 90
97 98
High level alarm
NRS 1-41 NRG 16-41 Reserved Reserved Reserved
X X + 1 X + 2 X + 3 X + 4
6 7 8 9 10 Factory setting
Further components
SRL 40
X=(sensor: level limiter // hi alarm)+2 Factory setting
ORT 6
98 Factory setting
Onoff level control
Reserved NRS 1-42 NRG 16-42
X – 1 X X + 1
19 20 21 Factory setting
Modulating level control
URZ 40 *) NRS 2-40 NRR 2-40 NRG 26-40 Reserved
X – 2 X – 1 X X + 1 X + 2
38 39 40 41 42 Factory setting
Automatic continous blowdown control
EF 1-40 *) Reserved LRR 1-40 LRG 1-4... Reserved
X – 2 X – 1 X X + 1 X + 2
48 49 50 51 52 Factory setting
Control unit
URB 1, URB 2
60 Factory setting
*) Only possible in conjunction with the user-friendly operating unit URB 2!

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Basic Settings – continued –
Factory setting
The display unit features the following factory set default values:
nBaud rate: 250 kb/s
nNode ID: 060 Note: This node ID should only be changed if necessary, max. node ID: 123.
Establishing / changing node ID
If several identical systems are to communicate in a CAN bus network, allocate a different node ID for
each system (e. g. limiter, controller, etc). In most cases it is sufficient to commission the equipment
with the default factory settings.
The code switch 7is on the back of the equipment.
Attention
n We recommend that you commission the CAN bus devices with the default factory
setting.
n Do not use a node ID for more than one piece of equipment in the CAN bus system.
Fig. 8 (Factory setting 250 kBit/s)
Code switch settings
S1 S2 S3 Baud rate Cable length
OFF ON OFF 250 kBit/s 125 m
ON ON OFF 125 kBit/s 250 m
OFF ON ON 100 kBit/s 335 m
ON ON ON 50 kBit/s 500 m
OFF ON ON 20 kBit/s 1,000 m
ON ON ON 10 kBit/s 1,000 m