1. Content and Purpose
This manual is intended to provide functional testing of the emergency stop (EMC) circuit, measurement of response time, and creation of documentation for technical workers, equipment maintenance managers, and reliability engineers. The procedure is intended for systems using electrical emergency stop circuits, including industrial units, automatic control equipment, and safety systems in the fields of automotive industry, aerospace industry, food industry, chemical industry, and energy.
2. Precautionary Measures
Turn off the electrical power before starting any work.
Use insulating footwear, eye protection goggles and gloves.
Perform the lockout/tagout process in accordance with the standards DSTU 3042-2017 and ISO 12100:2010.
Do not perform work on live electrical circuits in the absence of appropriate tools and protection.
3. Required Tools and Materials
| Tool | Specification | Quantity |
|---|---|---|
| Multimeter | Voltage range: 0–600 V, current range: 0–10 A, accuracy ±1% | 1 |
| Torque ring | Range: 0–100 Nm, size: 1/2"–3/4" | 1 |
| Insulation Tester | Range: 500 V, accuracy ±5% | 1 |
| Response Time Tester | Range: 10–1000 ms | 1 |
| Oscillator | Range: 0–1000 V | 1 |
4. Subject Inspection
| Item | Check | Acceptance/Rejection Criteria | Notes |
|---|---|---|---|
| 1 | Electricity supply is disconnected | Measure the voltage at the output of the power supply | The voltage must be 0 V |
| 2 | Emergency stop circuit is intact | Visual inspection for signs of damage | Detection of breaks, burning |
| 3 | All sensors and relays are installed | Check availability and functionality | Absence of missing or faulty components |
| 4 | Tools are ready for use | Check electronics, batteries and cables | Absence of broken elements |
5. Step by step procedure
Disconnect the power supply. Perform the lockout/tagout process in accordance with DSTU 3042-2017. Use an electrical tester to confirm the absence of voltage.
Response time measurement: Connect the response time tester to the emergency stop sensor input and measure the time from the moment of call to the moment of power disconnection. The response time should be within 50–300 ms, depending on the system type.
Error: Failure to lockout poses a danger to persons working on live equipment.
Functional test: Use a multimeter to check the voltage at the input and output of the emergency stop circuit. The input voltage should be 230 V, and the output voltage should be 0 V when disconnected.
Insulation measurement: Use an insulation tester to measure the insulation resistance. The resistance should be no less than 1 MOhm for systems with voltage up to 1000 V.
Error: Incorrect sensor installation causes incorrect results.
Sensor Check: Apply a test signal to the emergency stop sensor input. Measure the output voltage at the output. The output voltage must be 230 V to confirm correct operation.
Return to service: After confirming the correct operation, restore power using the unlock (Unlock/Tagout) process in accordance with ISO 12100:2010.
Error: Absence of unlocking poses a danger to workers.
6. Post-maintenance inspection
| Test | Expected result | Actual Result | Pass/Fail |
|---|---|---|---|
| Response time measurement | 50–300 ms | measure | measure |
| Input Voltage | 230 V | measure | measure |
| Output Voltage | 0 V | measure | measure |
| Insulation support | ≥1 MΩ | measure | measure |
7. Debugging Section
| Symptom | Likely cause | Reimbursement |
|---|---|---|
| Incorrect correspondence | No signal at input | Check sensor connection |
| Sensor Burnout | Overload | Replace sensor |
| No output voltage | Lack of power supply | Check power supply |
| Incorrect response time measurement | Incorrect Tester Installation | Check the correct installation |
8. Recommended Maintenance Schedule
| Task | Frequency | Estimated duration | Skill Level |
|---|---|---|---|
| Functional test | Monthly | 15–30 min | Average |
| Response time measurement | Quarter | 10–20 min | Average |
| Insulation Check | Annual | 20–40 min | High |
| Sensor Replacement | Annual | 30–60 min | High |
9. Special Parts
| Part description | Typical Specification | Category UNITEC-D |
|---|---|---|
| Emergency stop sensor | Voltage: 230 V, input: 0–10 V, output: 0–230 V | 3452-2023 |
| Emergency Stop Relay | Voltage: 230 V, current: 10 A | 3452-2024 |
| Time Response Tester | Range: 10–1000 ms | 3452-2025 |
| Insulation Tester | Range: 500 V | 3452-2026 |
Для отримання детальної інформації про частини та їх специфікації, відвідайте сайт UNITEC-D: https://www.unitecd.com/e-catalog/
10. References
- DSTU 3042-2017 – Technical Safety Devices, Electrotechnical Devices
- ISO 12100:2010 – Machine Safety: General Requirements
- ISO 30401:2018 – Safety of machinery: Requirements for working with electrical equipment
- CE and UkrSEPRO certifications
