Safety-Related Segment Circuit - GE VersaSafe VersaPoint IC220SDL840 User Manual

2
Achievable safety integrity
level
2-6
The achievable safety integrity level (SIL, SIL CL, Cat., PL) depends on the following
parameters:
– Parameterization (two-channel or single-channel)
– Load wiring (error prevention can also play a role here)
– Load (DC, AC, current, voltage, etc.)
– Switching frequency
In order to detect all errors, the safety relays must be switched at regular intervals (for proof
test interval, see "Safe digital relay outputs" on page 11-4).
2.5

Safety-related segment circuit

The module can be used to create a safety-related segment circuit.
The safety-related segment circuit starts at the safety module and finishes at the last
terminal before another power supply unit or at the end of the station. Only VersaPoint
terminals that are specifically designed for this safety-related segment circuit may be used.
The safety module can be used to safely connect or disconnect the supply voltage
(segment supply) to the subsequent VersaPoint terminals in the safety-related segment
circuit.
A maximum of 4 A can be switched in this safety-related segment circuit.
Observe the specifications for the safety-related segment circuit in the "Safety-related
segment circuit" application note (see Section "Ordering data: Documentation" on
page 11-9).
The application note includes lists of approved terminals, requirements for wiring, and
safety notes.
The document is available on the Internet at http://support.ge-ip.com.
User manual IC220SDL840 - May 2018
GFK-2734