cpp – Process technology for the chemical industry 02.2020

cpp FOCUS SAFETY AND SECURITY
High-performance, configurable small controller for efficient automation projects
Functional all-rounder for
safety
The product range of configurable safe small controllers Pnozmulti 2 from Pilz
monitors a diverse range of safety functions on plant and machinery and stands for
maximum safety, including in the process industry. Depending on the application,
the configurable small controller can cover a safety range up to PL e/Cat. 4 of
EN ISO 13849-1 and SIL CL 3 of EN / IEC 62061. Pnozmulti 2 is based on a modular
hardware platform and provides the base units Pnoz m B0 and Pnoz m B1.
There‘s a wide range of expansion modules
to cover safety-related requirements.
For example: monitoring emergency stop,
safety gates, light curtains, two-hand controls
and press safety valves, right through
to motion monitoring functions. In
particular, the safe analogue input modules
Pnoz m EF 4AI cover tasks in the process
engineering sector. With the Pilz analogue
input module you can safely record and
monitor any process operations up to SIL 3
of IEC 61511. The software tool of the configurable
small controller, the Pnozmulti
Configurator, provides software blocks for
analogue input, feasibility, scaling and arithmetic
functions for this purpose. They not
only make project configuration simpler,
but above all faster. Parameters for limit
values and range monitoring can be set
with just a few clicks.
Fast and precise reactions
The independent module program (mIQ)
allows fine-granular settings for values,
which can be processed quickly, directly
within the module. Processes can also be
monitored safely and with precision. Pres -
sure, temperature, flow rate, distance, fill
level or even rope speed and load are just
some of the things that can be monitored
reliably. Process cycles, which include force
conditions, bending operations or distance
measurement, are also included.
Users of the module program mIQ can also
implement fast reaction times, as all the
commands are processed decentrally within
the module. During configuration, the analogue
measured values can be scaled into
numeric variables of any unit of measurement.
Parameters for monitoring the limit
value, range or work area can be set via the
software tool. The design guarantees compliance
with the sensors’ standard measuring
range, so that established industrial
standards are easy to apply.
The small controllers Pnozmulti can be used for project planning, configuration,
documentation and commissioning. Convenient diagnostic solutions also make troubleshooting
easier, so reducing plant and machine downtimes.
Pictures: Pilz
Diagnostics firmly in view
The analogue input module provides the
user with four independent, safe analogue
current inputs of 4 to 20 mA with signed
15 Bit resolution. The measuring range is
0 tp 25 mA. The analogue inputs are suitable
40 cpp 02-2020