Configurable for different applications
Selected application can be locked using seal
Slot-in termination with coding
Safety guard monitoring Emergency stop function Area protection Two-hand conrol Setting mode
Signalling of the system status, input signals and outputs

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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