SR103 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

· Performance grade (PL)：PLe Stop level EN ISO13849

· Security category (Cat.)：Cat.4 Stop level EN ISO13849

· Time (TM): 20 years Stop level EN ISO13849

· Diagnostic coverage rate (DC/DC AVG): 99% Stop level EN ISO13849

· Safety level (sil): sil3 Stop level IEC61508, IEC62061

· Hardware fault margin (hft): 1 Stop level IEC61508, IEC62061

· Safety Failure Score (SFF): 99% Stop level IEC61508, IEC62061

· Risk failure probability (pfhd): 3.09e-10/h Stop level IEC61508, IEC62061

· Stop level (Stop Category)：0 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

环境特性参数

·Environmental characteristic parameters：accord with EN60947，EN61000-6-2，EN61000-6-4

·frequency of oscillation：10Hz~55Hz

·Vibration amplitude：0.35mm

·usage temperature：-20℃~+60℃

·storage temperature：-40℃~+85℃

·relative humidity：10%~90%

·Electrical clearance and creepage distance：accord with EN60947-1

·Overvoltage level：Ⅲ

·class of pollution：2

·the protection grades：IP20

·altitude：≤2000m

·rated insulation voltage：250VAC

·Rated impulse voltage：6000V(1.2/50us)

·dielectric strength：1500VAC， 1min

Application parameters

functional block diagram	Typical application

outline dimension

Overall dimensions (depth× height× width)：

114.5mm×99.0mm×22.5mm

Wiring diagram

Power

Supply

Input

circuit

safety

moncee

single channel

Double-channel short-

circuit detection

Without short circuit detection in two channels

Input

circuit

emergency

stop

button

exit

automatic reset

manual reset

Reset

circuit

automatic reset

manual reset

feedback

loop

Secure dual-channel module capable of constructing multiple security products
Performance index e corresponding to ISO 13849-1
Safety certification for safety category 4
Built-in self-diagnosis function to detect faults.
Can choose automatic reset or manual reset
Passed TUV certification

product model

product model	power supply	Safety input 1CH	Output	Order number
SR301-3A1B	24V AC/DC	Door lock emergency stop	3NO+1NC
SR302-3A1B	24V AC/DC	Light curtain	3NO+1NC
SR303-3A1B	24V AC/DC	Hands	3NO+1NC
SR304-3A1B	24V AC/DC	carpet	3NO+1NC
Explanation

Industry application

Packaging Equipment

Stamping equipment

Injection equipment

Food industry equipment

Pharmaceutical equipment

Feeding equipment

Automation industry equipment

Function application parameters

功能框架图	接线原理图

Contact us

400-881-6062

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