SM-602 programmable safety controller

As the most important part of safety loop, safety controller/safety PLC has been recognized by more and more people, but in the process of use, there are still many users who are confused about the differences between safety relay and ordinary relay, so I would like to share them with you here. As we all know, we must remember three words in the concept of safety design:

(1) Redundancy

(2) Difference

(3) Self-detection

How to construct the safety loop with the reliability above PLd, the safety controller must become an important link. The safety loop consists of safety input, safety control and safety output subsystems, 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.

▊	SM-602 programmable safety controller

• Is a configurable safety controller, which supports the input of various safety product components.

• Maximum support for 6 sets of dual-loop inputs.

• 2-way safety relay output

• 4-channel semiconductor safety output, expandable output module

• Modbus protocol communicationInput and output fault indicator light

• Safety certification: PL e, Cat: 4

▊	Product selection

product name

Type number

Safe input

Output

Brand

Safety controller

SM-602

6CH

2NO+4SO

LHS

explain

Up to 6 sets of dual-channel safety products can be entered.

Safety grating, emergency stop, safety door lock, reset, etc.

Official website programming software download connection: http://lhsafety.com.cn/showinfo-257-118-0.html

▊	safety performance

• Performance level (PL): PL e

• Security category (Cat.): Cat.4

• Mission time (TM): 20 years

• Diagnostic coverage (DC/DC avg): 99%

• Safety Integrity Level (SIL): SIL3

• Hardware Fault Margin (HFT): 1

• Safe Failure Score (SFF): 99%

• Probability of dangerous failure (PFH d): 1.78E-9/h

• Stop Category: 0/1

Complies with standard EN ISO13849

Conforms to standards IEC61508, IEC62061

Complies with standard EN 60204-1

▊Main technical parameters

Power supply

characteristics

·Power supply voltage: 24VDC

·Voltage range: 20~30VDC

·Current loss: ≤110mA(24VDC)

Input characteristics

·Input current: ≤10mA(24VDC)

·Conductor resistance: ≤15Ω

·Input equipment: emergency stop button, safety door, two-hand button safety light curtain, magnetic safety switch, etc.

·Input channel: 6

Relay output

characteristics

·Number of contacts: 2NO (safety output)

·Contact material: AgSnO2

·Contact fuse protection: 10A is fast, 6A is slow.

·Switching capacity: 5A/230VAC；; 5A/24VDC

Semiconductor output characteristics

·Number of contacts: 4SO (safety output)

·Contact fuse protection: 10A is fast, 6A is slow.

·Switching capacity: 2A/24VDC

Time characteristic

·Suction buffer time: ≤100ms

·Release buffer time: ≤30ms

·Recovery time:

Emergency stop operation: ≤30ms

Power failure: ≤1000ms

·Recovery time:

Emergency stop operation: ≤30ms

Power failure: ≤100ms

·Short-term power interruption: 20ms

Communication

characteristics

·Baud rate: 38.4kbps (fixed)

·Communication length: ≤1000m

·Networking capacity: ≤10 units

▊	Environmental characteristic parameters

·Electromagnetic compatibility: comply with EN60947, EN61000-6-2 and EN61000-6-4.

·Vibration frequency: 10Hz~55Hz

·Vibration amplitude: 0.35mm

·Service temperature: -20℃~+60℃

·Storage temperature: -40℃~+85℃

·Relative humidity: 10%~90%

·Overvoltage grade: Ⅲ

·Pollution level: 2

·Altitude: ≤2000m

·Rated isolation voltage: 250VAC.

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

·Insulation strength: 1500VAC, 1min.

·Electrical clearance and creepage distance: in accordance with EN60947-1.

▊	Functional application parameters

functional block diagram

Typical application

图片4.png

Input element: CH1 (emergency stop button); CH2 (emergency stop button); CH3 (reset button)

Input element: CH4 (emergency stop button); CH5 (emergency stop button); CH6 (reset button)

Control logic: CH1&CH2CH4&CH5

Reset mode: manual reset output delay: 0s.

Safety level: Cat.4 performance level: PLe safety integrity level: SIL 3

▊	Wiring diagram

Power Supply

correspondence

input


reset
feedback
output

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