User manual

11.2 Replacingtheelectronicunit
WARNING
Explosion risk!
Pulling out the electronic unit (hot swap) may
generate sparks.
▶ Prior to starting work, make sure that
there is not a potentially explosive atmos-
phere!
WARNING
Pulling or inserting of an electronic unit
might bring the inputs and outputs of
all other modules temporaryly into an
undened condition!
▶ If the machine/system might be put into a
dangerous state as a result of the removal
of an electronic unit, a replacement can
only be made once the machine/system is
disconnected from thepower!
▶ Only one electronic unit may be removed
from the station at any one time. If mul-
tiple electronic units have to be replaced,
this must be done consecutively.
ATTENTION
The product can be destroyed by elec-
trostatic discharge!
The components in the u-remote series can
be destroyed by electrostatic discharge.
▶ Please make sure that personnel and work
equipment are adequately earthed!
Once an electronic unit is removed from a
power-feed module, the inputs and outputs of
the subsequent modules are no longer sup-
plied with power. For PF-O-xDI-SIL modules,
this is equivalent to triggering the connected
safety equipment!
An electronic unit can be replaced while the system is pow-
ered up (no load) and in operation without having to disas-
semble the module. The station remains functional, and
there is no need to disconnect and restart it. When replacing
the electronic unit, the wiring remains intact.
If the new electronic unit is to be coded by the customer,
new coding pins will be required.
▶ Unlock the connector frame and open it as far as possible
(at least to an angle of 90°).
Unlockingtheconnectorframe
Openingtheconnectorframe
Replacingcomponents| Replacing the electronic unit
274 1432790000/03/02.2014Manual u-remote