2
Operating instructions
Safety-monitoring module
SRB-E-204ST / SRB-E-204PE
EN
1.4 Appropriate use
The products described in these operating instructions are developed to
execute safety-related functions as part of an entire plant or machine. It
is the responsibility of the manufacturer of a machine or plant to ensure
the correct functionality of the entire machine or plant.
The safety-monitoring module must be exclusively used in accordance
with the versions listed below or for the applications authorised by the
manufacturer. Detailed information regarding the range of applications
can be found in the chapter "Product description".
1.5 General safety instructions
The user must observe the safety instructions in this operating
instructions manual, the country-specific installation standards as well
as all prevailing safety regulations and accident prevention rules.
Further technical information can be found in the Schmersal
catalogues or in the online catalogue on the Internet:
www.schmersal.net.
The information contained in this operating instructions manual is
provided without liability and is subject to technical modifications.
The entire concept of the control system in which the safety
component is integrated, must be validated to the relevant
standards.
There are no residual risks, provided that the safety instructions as well
as the instructions regarding mounting, commissioning, operation and
maintenance are observed.
1.6 Warning about misuse
In case of inadequate or improper use or manipulations of
the safety-monitoring module, personal hazards or damage
to machinery or plant components cannot be excluded.
The relevant requirements of the standards ISO 14119 and
ISO 13850 must be observed.
1.7 Exclusion of liability
We shall accept no liability for damages and malfunctions resulting from
defective mounting or failure to comply with this operating instructions
manual. The manufacturer shall accept no liability for damages
resulting from the use of unauthorised spare parts or accessories.
For safety reasons, invasive work on the device as well as arbitrary
repairs, conversions and modifications to the device are strictly
forbidden; the manufacturer shall accept no liability for damages
resulting from such invasive work, arbitrary repairs, conversions and/or
modifications to the device.
The safety relay module is to be operated in an area in which access
by personnel is restricted.
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
SRB-E-204ST-
➀
SRB-E-204PE-
➀
No. Option
Description
➀
Plug-in screw clamps: single wire (rigid)
or fine wire (flexible): 0.2 … 2.5 mm²;
fine wire with ferrule: 0.25 … 2.5 mm²
CC
Plug-in cage clamps: single wire (rigid)
or fine wire (flexible): 0.2 … 1.5 mm²;
fine wire with ferrule: 0.25 … 1.5 mm²
Only if the action described in these operating instructions is
carried out correctly will the safety function be safeguarded,
including compliance with the Machinery Directive.
2.2 Special versions
For special versions, which are not listed in the order code below 2.1,
these specifications apply accordingly, provided that they correspond
to the standard version.
2.3 Destination and use
The safety-monitoring modules for integration in safety circuits are
designed for fitting in control cabinets. They are used for the safe
evaluation of the signals of positive break position switches or safety
sensors for safety functions on sliding, hinged and removable safety
guards as well as emergency stop control devices, safety solenoid
switches and AOPD's.
The safety function is defined as deactivating outputs Q1,Q2 when
inputs S12/S22, S32/S42, S52/S62 and S72/S82 are opened.
Taking account of a PFH value assessment, the safety-relevant current
paths meet the following requirements (see also chapter 2.6 “Safety
classification”)
• Control category 4 - PL e to ISO 13849-1
• SIL 3 to IEC 61508
• SILCL 3 to IEC 62061
Safety outputs Q1 and Q2 of input extension SRB-E-204PE must be
processed further by means of a fail-safe sequential circuit. Start and
reset function as well as feedback circuit monitoring must be realised
with the sequential circuit.
To determine the Performance Level (PL) to ISO 13849-1 of the entire
safety function (e.g. sensor, logic, actuator), an assessment of all
relevant components is required.
