Multifunctional safety relay modules PROTECT SRB-E
New family of electronic safety relay modules
The PROTECT SRB-E is a series of multifunctional, configurable, electronic safety controllers. The series variants include
- modules with safe PNP outputs,
- monitoring of two-hand controls,
- monitored input expansion up to Cat.4/PLe
- multi-evaluation of up to 4 safety guards up to Cat.4/PLe
- high 5.5A PNP switching capacity
- fast cycle times (60 switching cycles/min)
- cascading series connections of safe outputs
Each module can be adjusted to one of up to 11 preset configurations which include selecting the type of reset, activating or deactivating cross-wire monitoring, and selecting the monitored contact configuration – all via a rotary dial on the front. Once changed to the desired setting, the dials are protected from further adjustment by a transparent front cover which can be easily secured with a security seal.
The PROTECT SRB-E series provides a higher level of diagnostic capabilities with LEDs for both controller status as well as error fault codes, thus assisting with troubleshooting safety circuits.
The reduced number of versions and a clear overview of their functions, make it considerably easier for a machine manufacturer to select a module from this series to standardize on for multiple applications. The ability for each controller to handle many types of conventional and electronic safety switches makes this a desirable safety controller series. The safety relay modules of the PROTECT SRB-E series can be used in applications up to Category 4, PLe in accordance with ISO 13849 and SIL 3 in accordance to IEC 61508.
Another bonus feature of the new SRB-E range are the housings which have been optimized by Schmersal according to customer requirements. They are small, compact and feature a range of new, practical functions:
- Removable terminal blocks with positional coding.
- Function and delay timer setting via rotary dial on front.
- Settings secured by clear cover and security seal.
- Snap-in equipment label allows individual project and device identification.
Available Models
SRB-E-201LC
2 safe PNP outputs
1 auxiliary PNP output
SRB-E-201ST
2 safe PNP outputs
1 auxiliary PNP output
Two-hand Controls option
SRB-E-301MC
3 safe relay outputs
1 auxiliary relay output
SRB-E-301ST
3 safe relay outputs
1 auxiliary relay output
SRB-E-212ST
2 safe relay outputs
1 delayed safe PNP output
2 auxiliary PNP output
SRB-E-232ST
2 safe PNP outputs
3 delayed safe relay outputs
1 auxiliary relay output
1 auxiliary PNP output
SRB-E-322ST
3 safe relay outputs
2 delayed safe PNP outputs
1 auxiliary relay output
1 auxiliary PNP output
SRB-E-204ST
2 safe PNP outputs
4 auxiliary PNP output
Monitored input expansion
SRB-E-402ST
2 safe relay outputs
2 safe PNP outputs
1 auxiliary relay output
1 auxiliary PNP output
Monitoring of 2 separate functions
SRB-E-204PE
Input expansion module
Cascade multiple units
4 auxiliary PNP output