SEW-Eurodrive MOVIDRIVE MDA90A-0640-503-X-S00

9
Functional safety
Safety Conditions
Operating Instructions – MOVIDRIVE
®
modular
257
– The switch-off test pulses on both sourcing channels must be switched with a
time delay. However, additional switch-off test pulses may occur simultan-
eously.
– The switch-off test pulses in both sourcing channels must not exceed 1ms.
– The next switch-off test pulse in one sourcing channel must only occur after a
2ms time period.
– The signal levels must be played back by the safety controller and compared to
the expected value.
2-pole sourcing/sinking:
• In disconnected state, no switch-on test pulses must occur in the sourcing cable.
• In connected state:
– The switch-off test pulses in the sourcing and sinking channel must not exceed
1ms.
– The next switch-off test pulse in the sourcing or sinking channel must only oc-
cur after a 2ms time period.
– The signal levels must be played back by the safety controller and compared to
the expected value.
2-pole serial sourcing:
• Fault exclusion in the connection lead is mandatory if no external test pulses are
possible.
1-pole sourcing:
• In disconnected state, no switch-on test pulses must occur in the sourcing cable.
• In connected state:
– The switch-off test pulse in the sourcing channel must not exceed 1ms.
– The next switch-off test pulse may only occur after a time period of 2ms.
– The signal levels must be played back by the safety controller and compared to
the expected value.
24748536/EN – 11/2017