CARLO GAVAZZI PD140 Manual Del Usuario página 8

Functional verification procedure for the test input safety-related part of a
control system (SRP/CS)
NO MOVEMENT
ALLOWED
Maintenance
The photoelectric sensors do not require any particular maintenance. How-
ever, it is recommended to inspect the sensors every six months by clean-
ing the optical parts and perform a test as described under "Testing".
8
NO
NO
NO
FUNCTIONALITY
ABNORMAL
START
IS RELAY
ENERGIZED
YES
ACTIVATE
TEST INPUT
IS RELAY
DEENERGIZED
YES
DEACTIVATE
TEST INPUT
IS RELAY
ENERGIZED
YES
FUNCTIONALITY
NORMAL