Kübler SMC1.3, Safety Manual

Page: 155 / 235

R60047.0002 - Index 2 EN – page 35 / 115
6.7 Combination: HTL (differential) + HTL (A)
Device:
SMC2.4
„Op-Mode 1“:
1
Sensor 1:
[X21 | ENCODER IN 1]:
HTL (differential)
Encoder
A, /A, B, /B, (Z,/Z)
„Op-Mode 2“:
3
Sensor 2:
[X22 | ENCODER IN 2]: HTL (A) Encoder A
Safety Level:
Speed

SIL3 / PLe achievable (see below) *
Direction

SIL3 / PLe achievable (see below) *
Standstill

SIL3 / PLe achievable (see below) *
The combination HTL (A) + HTL (differential) is also possible, the sensors, the encoder
supplies and the settings have to be adjusted accordingly.
• The final Safety Integrity Level (SIL) and Performance Level (PL)
depends on the selected configuration and on external
components connected to the unit.
•
For unbalanced single channel signals, the parameter “Edge 1” and
“Edge 2” must be set to 1, so that a stable frequency can be
detected.
*)
•
To achieve a safety level with this configuration, the user must be
sure that the equipment will physically be able to rotate or move in
one direction only (no reversals!). This could e.g. be ensured by use
of a self-locking gearbox.
• With single channel encoders, jitter around an edge can be
misinterpreted as a frequency
.