24
2 Product description
2.3.9
Connection of single-channel safety switches
One or two safety switches 1 channel with dry contacts, monitoring 1oo1
Parameters
Value
Connection example
Safety inputs
1 channel
Cross-fault detection
ON
Safety outputs
1 wire (PL d)
Monitoring time
10 s
Stable time
0.7 s
Safety classification
Inputs X1 & X2
−
up to Cat 2 / PL d / SIL 1
Output DO:
−
Various safety switchgear from different manufacturers.
WARNING
For safety switchgear with dry contacts,
cross-fault detection must be activated !
Set Stable time 0.7 s and Monitoring time 10 s.
2.3.10 Safety-Relay-Module SCHMERSAL SRB-E
Safety-Relay-Modules with 2 channel safety inputs, monitoring 1oo2
Parameters
Value
Connection example
Safety inputs
2 channels
Cross-fault detection
OFF
Safety outputs
2 wires (PL e)
Monitoring time
2 s
Stable time
0.1 s
Safety classification
Inputs X1 & X2
−
Outputs DO & Y1:
−
up to Cat 4 / PL e / SIL 3
INFORMATION
The safety output Y1 can be loaded with a maximum of 15 mA.
All SCHMERSAL Safety-Relay-Modules of the SRB-E series with 2 inputs for pulsed 24V signals
up to a load of < 15 mA can be connected. (e.g. SRB-E-301ST, SRB-E-201ST/LC, etc.)
