GESTRA SRL 6-60 User manual

Original Installation &
Operating Manual
Monitoring Logic Unit
SRL 6-60
819698-00
EN
English

2SRL 6-60 - Installation & Operating Manual - 819698-00
Contents
Content of this Manual....................................................................................................................................4
Scope of delivery/Product package................................................................................................................4
How to use this Manual...................................................................................................................................5
Illustrations and symbols used.......................................................................................................................5
Hazard symbols in this Manual.......................................................................................................................5
Types of warning .............................................................................................................................................6
Specialist terms/Abbreviations.......................................................................................................................7
Usage for the intended purpose...................................................................................................................... 8
Overview of possible unit combinations ......................................................................................................8
Applicable directives and standards............................................................................................................9
Improper use ...................................................................................................................................................9
Basic safety notes .........................................................................................................................................10
Required personnel qualifications................................................................................................................10
Notes on product liability..............................................................................................................................10
Function .........................................................................................................................................................11
System description - Intended purpose.....................................................................................................11
Functional description of the SRL 6-60 .....................................................................................................13
Configuring and operating the SRL 6-60 ...................................................................................................14
Technical data ...............................................................................................................................................15
Factory settings.............................................................................................................................................16
Name plate/identification..............................................................................................................................17
Dimensions of field housing .........................................................................................................................18
Installation.....................................................................................................................................................19
Installation steps.......................................................................................................................................20
Interfaces and cable entry of the SRL 6-60..................................................................................................21
Electrical connection safety notes................................................................................................................22
Connecting the valve limit switches.............................................................................................................22
Connecting external pilot lamps to the relay output terminal.....................................................................22
Wiring diagram for the SRL-6-60 monitoring logic unit ..............................................................................23
Connecting the CAN bus system...................................................................................................................24
Bus line, cable length and cross-section ...................................................................................................24
Example ...................................................................................................................................................24
Important notes on connecting the CAN bus system..................................................................................25
Pin assignment of the CAN bus connector and coupling for non pre-wired
control cables...........................................................................................................................................25
Configuring the URS 60/ URS 61 safety control units .................................................................................. 26

3SRL 6-60 - Installation & Operating Manual - 819698-00
Contents
Operation and navigation..............................................................................................................................27
User interface (showing interval as an example) .......................................................................................27
Operation..................................................................................................................................................27
Colour coding of input and status fields ....................................................................................................28
Login with a password..............................................................................................................................28
Start, operation, alarm and test ....................................................................................................................29
The home screen after switching on .........................................................................................................29
Brief description of the interval time .........................................................................................................29
Brief description of the standby time.........................................................................................................30
Purge time................................................................................................................................................30
Purging.....................................................................................................................................................31
Stop..........................................................................................................................................................32
Special function........................................................................................................................................33
Testing the purging process to check the event chain ...............................................................................34
Monitoring................................................................................................................................................35
What to do if the mains power fails/returns...............................................................................................35
Settings..........................................................................................................................................................36
Opening the main menu............................................................................................................................36
Setting the date/time ................................................................................................................................37
Setting the baud rate ................................................................................................................................38
Setting the baud rate on the WAGO CAN coupler 750-347.........................................................................38
Configuring the SRL 6-60 monitoring logic unit...........................................................................................40
Opening the “Setup” menu .......................................................................................................................40
Login with a password..............................................................................................................................41
Setting the safety control unit, level electrode and the level electrode function..........................................41
Setting the interval and standby time........................................................................................................42
Ending configuration.................................................................................................................................42
Viewing messages.........................................................................................................................................43
Display of all events and system states.....................................................................................................43
System malfunctions.....................................................................................................................................45
Common faults during use........................................................................................................................45
What to do in the event of system malfunctions..........................................................................................45
Check installation and function .................................................................................................................45
Taking out of service/Disassembly............................................................................................................... 46
Disposal .........................................................................................................................................................46
Returning decontaminated devices.............................................................................................................. 46
EU Declaration of Conformity........................................................................................................................ 47

4SRL 6-60 - Installation & Operating Manual - 819698-00
Content of this Manual
Product:
Monitoring logic unit SRL 6-60
First edition:
BAN 819698-00/08-2019cm
© Copyright
All rights reserved. Any misuse, particularly reproduction and dissemination to third parties, is not permit-
ted. The General Terms & Conditions of GESTRA AG apply.
Scope of delivery/Product package
 1 x SRL 6-60 monitoring logic in field housing for wall mounting*
 1 x Installation & Operating Manual
* System components of monitoring logic unit
The SRL 6-60 monitoring logic unit features the XV102 compact unit from the Eaton company.
This, together with the WAGO I/O system 750, makes up the SRL 6-60 monitoring logic unit.

5SRL 6-60 - Installation & Operating Manual - 819698-00
How to use this Manual
This Installation & Operating Manual describes the correct use of the SRL 6-60 monitoring logic unit. It
applies to all persons who integrate this equipment in control systems, install, bring into service, operate,
maintain and dispose of this equipment. Anyone carrying out the above-mentioned activities must have
read this Installation & Operating Manual and understood its contents.
 Read this Manual in full and follow all instructions.
 Please also read the instructions for use of any accessories.
 The Installation & Operating Manual is part of the equipment package. Keep it in an easily accessible
location.
Availability of this Installation & Operating Manual
 Make sure this Installation & Operating Manual is always available to the operator.
 If you pass on or sell the equipment to a third party, please also hand over the Installation & Operating
Manual.
Hazard symbols in this Manual
Danger zone/Dangerous situation
Danger of death from electric shock
Illustrations and symbols used
1. Action to be taken
2.
 Lists
 Bullet points in lists
A Keys to illustrations
Additional
information
Read the relevant
Installation & Operating Manual

6SRL 6-60 - Installation & Operating Manual - 819698-00
Types of warning
DANGER
Warning of a dangerous situation that results in death or serious injury.
WARNING
Warning of a dangerous situation that may possibly result in death or serious injury.
CAUTION
Warning of a situation that may result in minor or moderate injury.
ATTENTION
Warning of a situation that results in damage to property or the environment.

7SRL 6-60 - Installation & Operating Manual - 819698-00
Specialist terms/Abbreviations
Here, we explain some abbreviations, specialist terms, etc., which are used in this Manual.
CAN (Controller Area Network) bus
Data transmission standard and interface for connecting electronic equipment,sensors and control systems.
Data can be sent and received.
NRG .. / URS .. / URB .. / SRL .. / NRS.. / etc.
Equipment and type designations of GESTRA AG.
SELV
Safety Extra Low Voltage
Interval time
The interval at which, depending on the operating mode (e.g. 24 h/72 h operation), the connecting pipes
must be flushed.
Standby time
The purging process must be initiated within this time. The standby time begins when the interval has
elapsed.
Purge time
The purging process must be initiated by valve actuation within this time. The start of the purge time is
also sent to the URS 60 / URS 61 safety control unit, where it runs parallel to the purge time.

8SRL 6-60 - Installation & Operating Manual - 819698-00
Usage for the intended purpose
The SRL 6-60 monitoring logic unit may only be used in connection with external safety level limiters
for low water (LW) or high water (HW) and the URS 60 or URS 61 safety control unit for monitoring the
separate purging of the connecting pipes to the level pot.
Overview of possible unit combinations
Water level
limiter
Safety high
level limiter
Safety control unit
for limiters Operating unit Monitoring logic unit
NRG 16-60
NRG 17-60
NRG 19-60
NRG 111-60
NRG 16-61
NRG 17-61
NRG 19-61
NRG 111-61
URS 60
URS 61
URB 60
SPECTOR
control
SRL 6-60
Fig. 1
Key to Fig. 1:
NRG = level electrode
URS = SPECTOR
connect safety control unit
URB = visual display and operating unit
SRL = monitoring logic unit
To ensure the proper use of equipment during all types of use, you must also read the Installa-
tion & Operating Manuals for the system components used.
 You can find the latest Installation & Operating Manuals on our website:
http://www.gestra.com/documents/brochures.html

9SRL 6-60 - Installation & Operating Manual - 819698-00
Usage for the intended purpose
Applicable directives and standards
The SRL 6-60 monitoring logic unit has been tested and approved for use in the scope governed by the
following directives and standards:
Directives:
 Directive 2014/30/EU EMC Directive
 Directive 2014/35/EU Low Voltage Directive
Standards:
 61000-6-2 Immunity for industrial environments
 61000-6-4 Emission standard for industrial environments
Improper use
There is a danger of death due to explosion if the equipment is used in potentially explo-
sive atmospheres.
Do not use the equipment in potentially explosive atmospheres.
Do not bring any equipment into service that does not have its own specific name plate.
The name plate indicates the technical features of the equipment.

10 SRL 6-60 - Installation & Operating Manual - 819698-00
Basic safety notes
There is a risk of electric shock during work on electrical systems.
 Always switch off the voltage to the device before opening the field housing and working on
the terminal strips.
 Check that the system is not carrying live voltage before commencing work.
Faulty equipment is a risk to system safety.
Only replace faulty equipment with identical equipment from GESTRA AG.
Required personnel qualifications
Activity Personnel
Integration in control system Specialist staff Plant designer
Installation/electrical connection/bring-
ing into service Specialist staff
Electrician/installer
The equipment may only be installed, wired
and brought into service by qualified and
competent staff.
Operation Boiler service technician Staff trained by the
plant operator
Maintenance work Specialist staff
Electrician
Maintenance and setup work may only be
performed by authorised staff who have
undergone specific training.
Setup work Specialist staff Plant construction
Fig. 2
Notes on product liability
We the manufacturer cannot accept any liability for damages resulting from improper use of the equip-
ment.

11SRL 6-60 - Installation & Operating Manual - 819698-00
Function
System description - Intended purpose
When LW/HW level electrodes are installed in external level pots, it is essential to monitor the periodic
purging of the connecting pipes. A monitoring logic unit is required for each level pot.
For purging, the connecting pipes are individually shut off and reopened in succession, and the level pot is
drained. The SRL 6-60 monitoring logic unit monitors compliance with the set times and the sequence of
valve operations.
To prevent cutouts during purging, the relevant safety control unit ignores the level signals from the LW
level electrode.
Components of the SRL 6-60 monitoring logic unit:
Fig. 3
SRL 6-60 WAGO I/O system 750

12 SRL 6-60 - Installation & Operating Manual - 819698-00
Function
Operating principle
Fig. 4 shows a water level limiter system with one level electrode in the boiler and the second electrode
in an external level pot.
The following combination is also possible, however:
 2 x NRG 1x-6x level electrode, external
 2 x SRL 6-60 monitoring logic unit
 1 x URS 60 or URS 61 safety control unit
The SRL 6-60 monitoring logic unit monitors the following times:
 Interval time
This is the interval at which, depending on the operating mode (e.g. 24 h/72 h operation), the con-
necting pipes must be flushed.
 Standby time
The purging process must be initiated within this time. The standby time begins after the interval has
elapsed.
 Purge time (safety-relevant function)
The purging process must be initiated by valve actuation within this time. Valve actuation and expo-
sure of the LW level electrode (electrode tip no longer submerged) are indicated by the limit switches.
The start of the purge time was also sent to the URS 60 / URS 61 safety control unit, and runs parallel
to the SRL purge time. If a signal is not received within the purge time, the safety circuit opens. As a
water level limiter can only be bridged for a maximum of 5 minutes, monitoring of the purge time is
relevant to safety.
URS 60 / URS 61 safety
control unit
Safety circuit
SRL 6-60
Electrode 1
NRG 1x-6x
Electrode 2
NRG 1x-6x
Fig. 4

13SRL 6-60 - Installation & Operating Manual - 819698-00
Function
Functional description of the SRL 6-60
The SRL 6-60 monitoring logic unit transmits the data telegram “Alert signal SRL 6-60” to the URS 60 / URS
61 safety control unit in 1s cycles.
The SRL 6-60 monitoring logic unit generates the time base for the purging intervals and monitors
compliance with these:
When the interval has elapsed, the standby time starts and the interval is reset to its initial value. The
purging process must be started within the standby time.
If the standby time is exceeded, the monitoring logic unit sends the commands “Open safety circuit” and
“Analyse limiter signal from LW level electrode 1 (2)” to the URS 60 / URS 61 safety control unit.
The start of the purging process is detected when valve Dor E leaves the OPEN limit switch. The data
telegram: “Ignore limiter signal from LW level electrode 1 (2)” is sent to the URS 60 / URS 61 safety
control unit when the purging process starts, and the data telegram: “Analyse limiter signal from LW level
electrode 1 (2)” is sent at the end of the purging process.
What happens if the purge time is exceeded
If the purge time (5 min.) is exceeded, the monitoring logic unit sends the commands “Open safety
circuit” and “Analyse limiter signal from LW level electrode 1 (2)” to the safety control unit. The command
is only cancelled when the purging process has successfully completed.
When an external safety high level limiter is being monitored, the signals from the HW level electrode are
not analysed.
What happens during a purging process outside the standby time
The initiation of a purging process outside the standby time causes the interval to be reset. The interval is
factory set ( 24h or 72h ). The same applies to the standby time and purge time. These settings are shown
on the display of the monitoring logic unit.
Selecting the control unit and level electrode, see page 41
A menu in the monitoring logic unit enables you to select the safety control unit with which the monitoring
logic unit is to communicate, and which level electrode is to be monitored. The following points must be
adhered to:
Safety
control unit
ID
Level
electrode 1
ID
SRL 6-60
ID
Level
electrode 2
ID
SRL 6-60
URS 60 1 3 * 2 4 *
URS 61 5 7 * 6 8 *
* The ID of the SRL 6-60 monitoring logic unit is assigned automatically when the safety
control unit is selected, see page 40.
Fig. 5

14 SRL 6-60 - Installation & Operating Manual - 819698-00
Function
Configuring and operating the SRL 6-60
Configuration with password protection, see page 28
The configuration can only be changed if you log in with a password. This prevents parameters and
settings from being changed by unauthorised persons.
Operation, see page 27
The SRL 6-60 is operated and configured on the device itself using the colour touchscreen
display.

15SRL 6-60 - Installation & Operating Manual - 819698-00
Technical data
Supply voltage
 24 V DC ( ), + 20 % / - 15 % - SELV
Power consumption
 Max. 10 W
IP rating
 Field case: IP 65
Data transmission interfaces
 1 x interface for CAN bus to ISO 11898, CANopen, not galvanically isolated
 1 x Ethernet (RJ 45) for remote operation (optional)
Inputs
 1 x 4-channel digital input terminals 24 V DC
 1 x 2-channel digital input terminals 24 V DC
for 5 volt-free contacts from the valve limit switches
Outputs
 1 x 2-channel relay output terminal 230 V AC, 30 V DC
 2 x N/O contact, volt-free; switching current AC/DC, max. 2 A
for external display of “Standby time is running” and “Stop”
Interval time
 Setting range: 2 - 255 hours (factory setting, see page 16)
Standby time
 Setting range: 15 minutes to 2 hours (factory setting, see page 16)
Purge time
 5 minutes (factory setting)
Baud rate
 Transfer
rate: 50 kBit/s (cable length up to 250 m)/(factory setting)
Indicators and controls
 Capacitive 5.7” touchscreen display with LED backlight
 Resolution: 640 x 480 pixels (WVGA)
 Brightness: 250 Cd/m2
 Size (field of view): 110 mm x 65 mm

16 SRL 6-60 - Installation & Operating Manual - 819698-00
Technical data
Admissible ambient conditions
 Service temperature: 0 °C – 50 °C
 Storage temperature: - 20 °C – 60 °C
 Transport temperature: - 20 °C – 60 °C
 Air humidity: 10 % – 95 % relative humidity, non-condensing
Housing
 Field housing for wall mounting
 Material: Polycarbonate (pale grey)
Dimensions, see page 18
 Front panel: (W x H x D) 180 x 254 x 165 mm
Weight
 Approx. 2.1 kg
Factory settings
The SRL 6-60 monitoring logic unit is delivered ex-works with the following settings:
 Baud rate: 50 kBit/s
 ID: see table below
 Interval time: 24 hours
 Standby time: 1 hour
 Purge time: 5 minutes
 Time synchronisation: On
 Password: 3503
Device Touch panel
Node ID
Wago IO
Node ID
CANopen object
1008 1009 100A
SRL 6-60_1 123 122 SRL 6-60_1 393158 311216-10
SRL 6-60_2 125 124 SRL 6-60_2 393259 311217-10
SRL 6-60_3 121 120 SRL 6-60_3 393260 311218-10
Fig. 6

17SRL 6-60 - Installation & Operating Manual - 819698-00
Mat.Nr.: 393158
10 W
In/Out: CAN-Bus
IP 65
24 V ± 20%
Münchener Str. 77
28215 Bremen
GERMANY
SRL 6-60_1
T50°C (122°F)
Betriebsanleitung
beachten
See installation
instructions
Voir instructions de
montage
Name plate/identification
Safety note
Equipment
designation
Fig. 7
Data interface
Manufacturer
Serial number
Supply voltage/
power consump-
tion/IP rating
Admissible ambi-
ent temperature
Disposal
information
CE
marking
xxxxxxxxxxxx

18 SRL 6-60 - Installation & Operating Manual - 819698-00
Dimensions of field housing
254 mm
180 mm
t
t = 165 mm
Fig. 8

19SRL 6-60 - Installation & Operating Manual - 819698-00
Installation
Install the SRL 6-60 monitoring logic unit as close as possible to the external level pot.
The field housing of the monitoring logic unit is intended for wall mounting. The four holes can be ac-
cessed by removing the upper part of the housing.
The dimensions of the holes are stamped on the back of the housing.
Danger of death from penetrating water due to short circuits and electric shock.
Leaky housing seals and incorrect or faulty cable glands can allow water to penetrate, leading
to a short circuit.
 Check and clean the housing lid seal before closing the lid.
 Only use the intended seal for the cable gland. Replace faulty seals and cable glands.
If the unit is to be installed outdoors, outside the protection of a building, environmental
influences may adversely affect function.
 Pay attention to the admissible ambient conditions in the technical data,
“Admissible ambient conditions” on page 16.
 Do not operate the equipment if the temperature is below freezing.
 At temperatures below freezing, use a suitable heat source (e.g. control cabinet heater,
etc.).
 Connect all system parts to a central earthing point to prevent equalisation currents.
 Use a cover to protect the equipment from direct sunlight, condensation and heavy rain.
 Use UV-resistant cable ducts for routing the connecting cable.
 Take further measures to protect the unit from lightning, insects and animals, and salty air.

20 SRL 6-60 - Installation & Operating Manual - 819698-00
Installation
Installation steps
1. Switch off the voltage to the system and check that no voltage is present.
2. Open the housing lid using a flat blade screwdriver.
3. Determine the desired installation position and fit the field housing.
4. Safely route all necessary connecting cables to the field housing.
5. Undo the cable gland Cand pull the connecting cable for the external pilot lamps
through the gland, taking care not to forget the seal.
6. Connect the external pilot lamps as shown in the wiring diagram, see page 23.
7. Tighten the cable gland Csecurely to ensure it is adequately sealed.
8. Screw the housing lid firmly back on, making sure the seal is correctly seated.