GE RSTi-EP, Руководство по функциональной безопасности

Страница: 17 / 76

Chapter3 . Configuration
GFK-2956A November 2017 13
4.1 Switch-off Delay Time
The turn-off time of a EP-19xx module is 20 ms, caused by the hardware and firmware delay time.
The time required until the output voltage even of the last switchable module of a safety segment is
below 5 V, can be calculated as follows:
Switch off delay [ms] =
Turn-off time of a EP-19xx module
+ S
um of all modules’ hardware delay
Switch-off Delay and Current Consumption
Module Hardware Delay (ms) Current Consumption (mA)
EP-2214 2 8
EP-2614 2 8
EP-2634 3 15
EP-2218 1 15
EP-225F 1 10
EP-5422 5 10
EP-5442 5 10
EP-4164 150 † 10
EP-4264 150 † 10
†
The delay time is always 150 ms, irrespective of the amount of these modules.
4.2 Operation With and Without Test Pulses
All safe power-feed modules provide a test pulse evaluation, so that the highest safety levels can be
achieved (see technical data).
Example of Operation with Test Pulses