Kübler SMC1.3, Руководство по безопасности

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R60047.0002 - Index 2 EN – page 21 / 115
5.5 Encoder output
The unit provides a safety-related and programmable HTL / RS422-Splitter-Output.
The splitter output allows to return the input frequency of sensor 1 or sensor 2. The
parameters in the Splitter menu allow the selection of the output level (5V = RS422 or
18-30V = HTL) as well as the selection of the frequency source (sensor 1 or sensor 2).
The signal delay between encoder input and splitter output is approx. 500 ns.
In case of error, no encoder signals are available at the splitter output (Tri-State, internal
with 10 kOhm pull-down resistors).
The connection of the splitter output is only safe if the following device can detect the
fault condition of the safety device.
Pluggable 9-pole terminal [X5]
The terminal [X5] is 9-pole:
[X5 | ANALOG OUT] Analog output [X4:2-3]
[X5 | ENCODER OUT] HTL / RS422-output [X4:4-9]
•
If the parameter "Split Level" is set incorrectly, the device connected
to the encoder output can be damaged.
•
In case of error, all traces of the splitter output are switched to
"low".
•
The Safety Integrity Level (SIL) or the Performance Level (PL) is
reduced if only the splitter output is connected. A parallel
connection of splitter and relay output or switching output is
necessary to reach SIL3 / PLe.