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SR-103 safety relay

As the most important link of safety circuit, safety controller/safety PLC has been more and more recognized by people. However, in the process of using it, there are still many users who are confused. What are the differences between safety relay and ordinary relay? I would like to share with you here. As we all know, we must remember three words about the concept of safety design:

(1) redundancy

(2) Differences

(3) Self-test

How to construct the safety loop reliability above PLd, the safety controller must become an important link. The safety loop consists of safety input, safety control and safety output, and the safety control "including safety relay, safety controller, safety PLC, etc." realizes the safety control function. Designers match different safety controllers to achieve the reliability level of the safety loop according to the number of products at the input end

SR103 safety relay

Two-channel safety monitoring relay module

· Secure dual-channel module capable of constructing multiple security products

· Performance index E corresponding to ISO 13849-1

· Safety certification of safety category 4

· Built-in self-diagnosis function for fault detection

· You can choose automatic reset or manual reset

· Pass TUV certification

Product selection

Power Supply

Enter 1CH safely

output

order number

SR103-3A1B

24V AC/DC

Door lock/emergency stop/light

screen（PNP）

3NO+1NC

explain

Emergency stop button, safety door, PNP safety light curtain, safety carpet

safety performance

· Performance grade (PL)：PLe

· Security category (Cat.)：Cat.4

· Time (TM): 20 years

· Diagnostic coverage rate (DC/DC AVG): 99%

· Safety level (sil): sil3

· Hardware fault margin (hft): 1

· Safety Failure Score (SFF): 99%

· Risk failure probability (pfhd): 3.09e-10/h

· Stop level (Stop Category)：0

Stop level EN ISO13849

Stop level IEC61508, IEC62061

Stop levelEN 60204-1

Main technical parameters

Power supply characteristics	·supply voltage：24VDC ·Voltage tolerance：0.85~1.1 ·Ac frequency：50Hz~60Hz ·Current loss：≤90mA(24VDC)
Input characteristics	·incoming current：≤50mA(24VDC) ·conductor resistance：≤15Ω ·Input: emergency stop button, safety door, PNP safety light screen
output characteristic	·Number of contacts：3NO+1NC ·Contact material：AgSnO2 +0.2μmAu ·Type of contact: forced guidance ·Contact fuse protection: 10AgL/gG, NEO ZED (normally open contact) 6AgL/gG， NEO ZED(the normally closed contact) ·Switching capacity(EN60947-5-1)：AC-15，5A/230V； DC-13，5A/24V ·mechanical life：More than 10 times
Time characteristic	·Release buffer time： Emergency stop operation：≤30ms Power failure：≤100ms ·recovery time： Emergency stop operation：≤30ms Power failure：≤100ms ·Short-term power interruption：20ms