Lenze c250-S, Руководство по эксплуатации

Страница: 172 / 264

6 Installation
and Operation
EDBC250SIO | 2.0
172
CAUTION
Safe wiring required
A cross-fault between a safe input and the associated test pulse signal will re-
duce the two-channel characteristic when assessing initial faults.
Example #1:
A cross-fault between safe input "Safe-In 0" and the associated test
pulse output "Safe In 0/4 TP" will be considered a steadily running piece of
safety switchgear and, thus, as an active safe input.
Example #2:
A cross-fault between safe input "Safe-In 0" and another safe input
"Safe In 4" supplied by the same associated test pulse signal will also be consid-
ered a steadily running piece of safety switchgear and, thus, as an active safe in-
put.
The application must prevent both cases because they will both lead to the safe
module not being detected.

Prevent cross-faults by safely wiring up the lines.

Another option of detecting potential wiring faults is to periodically test the
safety function by operating the safety switchgear. This requires the opera-
tor to make the required test and repeat it at sufficiently close intervals.