Festo ZSB-1/8-B User manual

ZSB-1/8-B
Control block for two-hand start
Operating instruc-
tion
8166273
2022-08c
[8166275]

Translation of the original instructions

Festo — ZSB-1/8-B — 2022-08c
3
Table of contents
1 About this document. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 Applicable Documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Product labelling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.3 Specified standards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Safety instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Safety function in accordance with ISO 13851. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Intended use. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.4 Foreseeable misuse. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.5 Training of qualified personnel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.6 Product conformity. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.7 Safety engineering approval. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Additional information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Product overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Product design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.2 Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5.1 Mounting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.1 Pneumatic installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7 Commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.1 Preparing commissioning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7.2 Performing functional test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8Operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.1 Checking operational reliability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
9 Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
9.1 Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
9.2 Cleaning. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
10 Malfunctions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
10.1 Fault clearance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
11 Disposal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
12 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
12.1 General technical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
12.2 Characteristic pneumatic values. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
12.3 Safety engineering characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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Festo — ZSB-1/8-B — 2022-08c
Safety
1 About this document
1.1 Applicable Documents
All available documents for the product è www.festo.com/sp.
1.2 Product labelling
• Observe the specifications on the product.
The product labelling is located on the right side of the device. The product labelling enables identifi-
cation of the product and shows the following information, for example:
Product labelling (example) Meaning
ZSB-1/8-B Order code
576656 Part number
MM-YYYY : XX MM = manufacturing month
YYYY = manufacturing year
XX = plant number
ISO 13851: TYPE III A Standard designation
0.4 – 0.8 MPa (58 –120 psi) Operating pressure
CE, UKCA Identification
Tab. 1: Product labelling (example)
1.3 Specified standards
Version
ISO 8573-1:2010-04 EN ISO 13849-1:2015-12
EN ISO 13851:2019-04 EN ISO 13849-2:2012-10
EN 60068-2-27:2009-05
Tab. 2: Specified standards
2 Safety
2.1 Safety instructions
–Only use the product in its original condition without unauthorised modifications.
–Only use the product if it is in perfect technical condition.
–Observe the identifications on the product.
2.2 Safety function in accordance with ISO 13851
The control block for two-hand start is a Type III A two-hand control system according to ISO 13851.
It has been developed and manufactured according to the pertinent fundamental and proven safety
principles of EN ISO 13849-2. The control block for two-hand start has structural properties that
enable Performance Level c / Category 1 to be achieved for implementation of the safety function.

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Additional information
5
The control block for two-hand start is not a complete safety solution. It can be used as part of a
safety solution. The achievable safety level of the system depends on the other components used to
implement the safety function. The operator is responsible for specification of the safety function.
2.3 Intended use
The control block for two-hand start is intended only for the manual triggering of a control signal by a
simultaneous activation of two actuators.
The control block for two-hand start is intended for installation in machines or automation systems.
The control block for two-hand start can only be used in standard operation. This also includes
downtime, setup mode, service mode and emergency mode.
2.4 Foreseeable misuse
The following are examples of foreseeable misuse and are not approved as intended use:
–Outdoor use
–Bypass of the safety function
2.5 Training of qualified personnel
Work on the product may only be carried out by qualified personnel who can evaluate the work
and detect dangers. The qualified personnel have skills and experience in dealing with pneumatic
(open-loop) control technology.
The qualified personnel must be familiar with the following information:
–Applicable instructions for operating safety engineering systems.
–Applicable instructions for accident prevention and occupational safety.
Only authorised and appropriately trained personnel are permitted to work on safety-related systems.
2.6 Product conformity
The product-relevant directives are listed in the declaration of conformity è www.festo.com/sp.
Product conformity
in accordance with EU Machinery Directive
to UK Supply of Machinery Regulations
Tab. 3: Product conformity
2.7 Safety engineering approval
The product is a safety device in accordance with the Machinery Directive. For details of the safety-ori-
ented standards and test values that the product complies with and fulfils, see è 2.2 Safety function
in accordance with ISO 13851.
3Additional information
–Contact the regional Festo contact if you have technical problems è www.festo.com.
–Accessories è www.festo.com/catalogue.

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Product overview
4 Product overview
4.1 Product design
1
6
1
2
4
3
7
7
5
Fig. 1: Product design
1
Port for inlets (1.1) and (1.2), size G 1/8
2
Port for outlet (2), size G 1/8
3
Port for exhaust (3), size G 1/8
4
Filter for venting hole
5
Blind holes with mounting thread (rear)
6
Screw with filter element
7
Through-holes for mounting
4.2 Function
The control block for two-hand start is a pneumatic AND gate. If pneumatic signals are sent to the
inputs (11) and (12) with a maximum time delay of 0.5 seconds, an output signal is sent at the outlet
(2).
The control block for two-hand start is controlled via 2 external, manually operated pushbutton valves.
–The outlet port (2) is pressurised while both pushbutton valves are actuated.
–If one or both external pushbutton valves are released, the outlet (2) is depressurised. The system
is exhausted from outlet (2) to exhaust (3).
To trigger another output signal, release both pushbutton valves and press them again.

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Installation
7
2.
Fig. 2: Example of a simple actuation
5Assembly
5.1 Mounting
1. Place the control block for two-hand start in such a way that the filter of the venting hole is not
covered.
Mount the control block for two-hand start with 2 M5 retaining screws:
–via the through holes, hole spacing 40 mm or
–via the fastening threads, hole spacing 38 mm
3. Install two 3/2-way pushbutton valves è Fig. 2.
6 Installation
6.1 Pneumatic installation
Requirement: Use hoses with the same nominal width and length between the pushbutton valves and
control block for two-hand start.
1. Connect the pneumatic ports according to the system's pneumatic circuit diagram.
2. If necessary, screw in a silencer on the exhaust (3).
Suitable silencer è 3 Additional information.
3. Clamp the hoses to the system.

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Festo — ZSB-1/8-B — 2022-08c
Operation
7 Commissioning
7.1 Preparing commissioning
1. Pressurise the system.
2. Set an operating pressure of at least 0.4 MPa (4 bar, 58 psi).
3. Perform a functional test è 7.2 Performing functional test.
7.2 Performing functional test
1. Make sure that there is an operating pressure of at least 0.4 MPa (4 bar, 58 psi) at the two
pushbutton valves.
2. Pressurise the inlets (11) and (12) according to the signal sequence shown in the figure below
è Fig. 3.
3. At each step, check whether the outlet (2) responds as in the following figure è Fig. 3.
The time offset between the inlet signals (steps 7 and 8) must be no more than 0.5 s.
Fig. 3: Functional test, step 1 … 15
The maximum permissible time offset between the inlet signals (11) and (12) (step 7 and 8) depends
on the operating pressure and the ambient temperature. The higher the operating pressure and
ambient temperature, the smaller the time offset needs to be.
8Operation
8.1 Checking operational reliability
1. Perform the functional test monthly è 7.2 Performing functional test.
2. Keep a record of the results of the functional tests.

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Malfunctions
9
4.
9 Maintenance
9.1 Disassembly
1. Exhaust the entire system and control block for two-hand start.
2. Remove the control block for two-hand start from the system.
9.2 Cleaning
1. Depressurise the control block for two-hand start.
2. Unscrew the screw with the filter element.
Do not lose the seal.
3. Clean the components of the control block for two-hand start only with the following cleaning
agents è Tab. 4 Overview of cleaning agents and cleaning intervals.
Replace the screw with the filter element.
–Tightening torque: 0.3 Nm ± 40%
5. Perform a functional test è 7.2 Performing functional test.
Component Cleaning supplies Cleaning interval
Housing Water, maximum 60 °C If required
Screw with filter element –Compressed air
–Water, maximum 60 °C
–Petroleum ether
–every six months or
–after 100,000 switching
cycles
Silencers
Tab. 4: Overview of cleaning agents and cleaning intervals
10 Malfunctions
10.1 Fault clearance
Malfunction Possible cause Remedy
Outlet (2) is depressurised
although both inlets are simul-
taneously pressurised (t £
0.5 s).
Input pressure too high –Reduce the pressure at the
inlet (11) and inlet (12).
Pressure reduction at outlet (2)
takes too long.
Hose connection fault –Use short hose assembly.
–Avoid angle fittings.
Silencer dirty –Clean or replace silencer.
Air exit at exhaust (3) if both
inlets are pressurised at the
same time (t £ 0.5 s).
Functional fault è 11 Disposal
Tab. 5: Malfunction table

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Technical data
11 Disposal
For the purpose of quality assurance, Festo is interested in the return of replaced control blocks for
two-hand start.
• Please get in touch with your regional Festo contact person for the conditions for the return
shipment.
When the end of the service life has been reached, disassemble and dispose of the control block for
two-hand start. Observe the local regulations when disposing of the control block for two-hand start
and the packaging.
12 Technical data
12.1 General technical characteristics
ZSB
Product weight [g] 420
Operating pressure1) [MPa] 0.4 … 0.8
[bar] 4 … 8
[psi] 58 … 120
Standard nominal flow rate [l/min] 50
Ambient temperature 2) [°C] 0 … 60
Nominal width [mm] 4
Actuation type Pneumatic
Mounting position Any
Type of mounting –with through-hole
–with female thread
Information on materials: Seals NBR
Information on housing materials Anodised wrought aluminium alloy
1) At ambient temperatures below 10 °C, an operating pressure of at least 0.6 MPa (6 bar, 87 psi) must be maintained.
2) Use suitable compressed air if the minimum temperature is below 1 °C. This prevents condensation from freezing.
Tab. 6: General technical characteristics
Shock resistance according to IEC 60068: Part 2-27
Acceleration [m/s2] Duration [ms] Shocks per direction
±300 11 5
Tab. 7: Shock resistance

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Technical data
11
12.2 Characteristic pneumatic values
ZSB
Operating medium1) Compressed air to ISO 8573-1:2010 [7:4:4]
Residual oil content with use of ester
oils
[mg/m3]< 0.1, corresponds to ISO 8573:2010 [–:–:2]
Information on the operating medium Lubricated operation possible, in which case lubri-
cated operation will always be required.
Pneumatic connection G 1/8
Corrosion resistance class 1
Internal exhaust unmounted
quick exhaust Available
Permissible leakage after mounting
under nominal conditions at port (2)
[l/h] 0.5
Switching operation: maximum offset
of the pilot signals2)
[s] 0.5
1) The pressure dew point must be at least 10 K lower than the temperature of the medium, otherwise moisture in the expanded
compressed air will freeze.
2) The higher the operating pressure the lower the maximum offset time.
Tab. 8: Characteristic pneumatic values
12.3 Safety engineering characteristics
Approval information, safety engineering
CE
Type-examination The functional safety engineering of the product has been certi-
fied by an independent testing body, see EC-type examination
certificate è www.festo.com/sp
Certificate issuing authority IFA, Certification Body of Machinery, NB 0121
Certificate no. IFA 1201046
UKCA
Type-examination The functional safety engineering of the product has been certi-
fied by an independent body, see UK-type examination certificate
è www.festo.com/sp
Certificate issuing authority Intertek Testing & Certification LTD, Approved Body for Machi-
nery, No. 0359
Certificate no. UK-MCR-0080
Tab. 9: Approval information, safety engineering

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Technical data
General safety reference data
Safety level In accordance with EN ISO 13849
Maximum achievable category 1
Maximum achievable performance
level
PL-c
Service life value B10 1 million switching cycles
Probability of failure per hour (PFHD) [1/h] £ 200,000 actuations/year: 1.14 x 10-6
> 200,000 actuations/year è Fig. 4
Duration of use TM20 a
Well-tried component Yes
Fault exclusion1) –Deformation due to overloading
–Automatic change of the initial switching posi-
tion without inlet signal
–Rupture of the valve housing
–Breakage of moving component
Type of two-hand control Type III A according to EN ISO 13851
Design features –Overlap
–Mechanical spring return
–Poppet valve with spring return
1) Faults that do not need to be taken into consideration by the user when analysing possible faults of a safety-related part of a control
system.
Tab. 10: General safety reference data
PFHD value
The PFHD value of the subsystem can, for example, be calculated with SISTEMA using the following
values:
–Service-life value B10D = 2 x B10 in accordance with EN ISO 13849-1, Table C.1, Note 1
–Average annual number of actuations (nop)
SISTEMA: software wizard for “Evaluation of safety-related machine applications according to EN ISO
13849.

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Technical data
13
Fig. 4: PFHD value as a function of the average number of actuations per year (nop)
The PFHD value was calculated with SISTEMA in expert setting with limitation of the MTTFD value to
100 years.
Operating time
Observe the operating time (T10D in accordance with EN ISO 13849-1, C.3) of the control block for
two-hand start. The operating time is a function of the service life characteristic (B10D) and the average
number of annual actuations (nop). The operating time can be shorter than the specified duration of
use depending on the application. The control block for two-hand start must be replaced by the end of
the duration of use at the latest.
Fig. 5: Operating time T10D

© 2022 all rights reserved to Festo SE & Co. KG
Copyright:
Festo SE & Co. KG
73734 Esslingen
Ruiter Straße 82
Deutschland
Phone:
[phone]
Internet:
www.festo.com