5. Installation, commissioning and operation
Information
Installation and commissioning have to be documented by means of an assembly
report and an inspection certificate. Installation and commissioning may only be
performed by authorised personnel who have been trained on functional safety.
5.1. Installation
General installation tasks (assembly, electrical connection) have to be performed
according to the operation instructions pertaining to the device and the enclosed
order-specific wiring diagram.
Figure 2: Wiring diagram example with safe end position feedback
[1] Limit switches for safe end position feedback
Installation and commissioning must be recorded and a final installation and
commissioning report must be issued.
When connecting actuator controls to safety PLC and a functional control system,
make sure that the inputs and outputs used have separate potentials. Imperatively
avoid one common for inputs and outputs when connecting to circuit of safety system
and basic process control system. Particular attention to comply with these
requirements has to be paid when selecting the input for the ESD signal, the inputs
and outputs of PVST and for fault signals (and possibly other feedback signals).
Information
Valve position indication is made via potentiometer or 4 – 20 mA signals. However,
this is not part of the determination of safety figures.
5.2. Commissioning
The operation instructions pertaining to the device must be observed for general
commissioning.
After commissioning, the safe actuator function must be verified.
5.3. Operation
Regular maintenance and device checks in the T
proof
intervals as defined by the
plant operator are the basis for safe operation.
The operation instructions pertaining to the device must be observed for operation.
The plant operator is responsible for power supply.
Once a fault occurs, the system has to be checked immediately and the installation
has to be put in a safe state, if required.
5.4. Lifetime
Actuator lifetime is described in the technical data sheets or the operation instructions.
Safety-related figures are valid for the cycles or modulating steps defined in the
technical data specifications and for typical periods of up to 10 years (the criterion
achieved first is valid). After this period, the probability of failure increases.
11
Multi-turn actuators
SA .2 with AC(V) 01.2/AC(V)ExC 01.2 Installation, commissioning and operation
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