Kübler SMC1.3, Safety Manual

Page: 213 / 235

R60047.0002 - Index 2 EN – page 93 / 115
14 Connection of the inputs
There are different ways to connect the inputs. The SMCx monitors offer HTL inputs with
SIL3 capability, provided that their configuration is set to two-pole-inverse operation.
The finally resulting Safety Integration Level (SIL) however also depends on the remote
circuit and on the configuration.
Relevant Parameters Remark
IN Config
Input characteristics (bipolar, unipolar, clocked)
Input Mode
Configuration of inputs (individual input, signal pair, mixed)
Switch Mode
=9, when an output is used for clock generation with clocked input
Output Mode Clock output must be set to “inverse”
GPI Err Time Max. permissible delay time during illegal conditions
• Unipolar, un-clocked inputs provide SIL = 1 only
• Unipolar, clocked inputs can reach SIL = 1 - 2
• Bipolar, un-clocked inputs can reach SIL = 2 - 3
Where you utilize clocked inputs, for the clock generation you should use OUT1,
OUT2
and OUT3 first, and lastly OUT4. The clock outputs are different regarding the
output frequency, and OUT1 is able to emit the highest frequency.
Both output tracks can be used due to the 180° phase displacement (please
observe parameter „Output Mode“)
14.1 Connection: unipolar, un-clocked inputs
Unipolar, un-clocked inputs are connected as shown below. Alternatively a change-over
contact can be used, toggling between GND and +24 V. Unipolar, un-clocked inputs
provide Safety Integrity Level (SIL) = 1. Parameter “
IN Config
” must be set to a value
between 8 and 11. Parameter
“Input Mode ” must be set to 1 or 2. No errors can be detected, the response time is
not affected.