Safeguarding - Harmony eXLhoist User Manual

Safeguarding

Overview
For general description, refer to Safeguarding function
Safeguarding can be assigned to a motion direction thanks to the eXLhoist Configuration Software.
The undesired event of Safeguarding function is the no disabling of motion buttons.
Safeguarding limit switches contacts must be NC contacts.
The safe state of the Safeguarding function is to open safety relays.
Function

Safeguarding

Safeguarding input signal:
Input signals limit switch
Logic 0 (Ulow)
Logic 1 (Uhigh)
Impedance
Debounce time
Response time of safety function
In order to justify of the safety category 2, an automatic diagnostic is realized on the Safeguarding
inputs thanks to the IN_COM output port. An external power supply of Safeguarding inputs cannot
be used.
Safeguarding is a passive stop function (function activated when an input signal is detected).
EIO0000001505 12/2014
Installation IEC 60204-32
STOP
category
NC Category 2 on
the motion
direction
(see page 107).
IEC 61508 IEC 62061
SIL SIL CL
SIL1 SIL1 CL
Units
V
V
kΩ
ms
ms
Safety
ISO 13849
Safety category PL
Category 2 for PL c
electronic parts
Category 1 for
electromechanic
al parts
Value
< 1
> 2
1.5
1
< 300
67