Safety
Operating Manual PSS u2 EF 2DO R 8A
1003625-EN-03
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3
Safety
3.1
Intended use
The module provides failsafe outputs and may be used for failsafe applications in the PSS
u2 system.
The module meets the requirements of EN IEC 61508 up to SIL 3 and EN ISO 13849-1 up
to PL e.
The outputs may be used to switch:
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Resistive loads
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Inductive loads
The module can be used in furnaces. If the module's relay outputs shut down the entire fuel
supply and the furnace is used in continuous operation, appropriate external measures
must be used to establish diversity of the shutdown elements (requirement of EN 50156-1).
For example, an appropriate measure may be an additional, monitored switching element
(contactor or relay), which is controlled by a safe semiconductor output and is switched in
series with both relay outputs.
The programmable safety system should be installed in a protected environment that meets
at least the requirements of pollution degree 2. Example: Protected inside space or control
cabinet with protection class IP54.
Make sure that only authorised personnel have access to the programmable safety system.
WARNING!
Risk of electric shock with overvoltage category III!
If you use the head module PSS u2 P0 F/S PN with the terminal block order
no. 328 830, contact with live components could cause life-threatening injur-
ies when voltage is applied.
In applications with overvoltage category III, the head module
PSS u2 P0 F/S PN should only be used with terminal block order no.
328 831.
Intended use includes making the electrical installation EMC-compliant. The module is de-
signed for use in an industrial environment. Interference may occur if used in other areas.
The following is deemed improper use in particular
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Any component, technical or electrical modification to the module,
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Use of the module outside the areas described in this manual,
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Any use of the module that is not in accordance with the technical details.
The module PSS u2 EF 2DO R 8A may be used in conjunction with the following terminal
block:
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8-pin terminal block
