1. Task and purpose
This technical manual is intended for testing the emergency stop circuit in industrial equipment. The purpose of this maintenance is to ensure the functional efficiency of the emergency stop system, measure the response time and document the results. This service is performed during placement, periodic maintenance, or after any changes in wiring, electronic modules, or mechanical components of the stop system.
2. Preliminary safety measures
Warning: Before performing any actions, turn off the power of the system and apply lockout and tagout (Lockout/Tagout). Use protective equipment, including work gloves, goggles, and protective clothing.
All actions should be performed only when the power supply is completely disconnected. It is prohibited to perform work on live elements. Before starting work, it is necessary to check for the presence of electrical tension.
3. Necessary tools and materials
| Name of the tool | Specification | Quantity |
|---|---|---|
| Torque wrench | The range is 10–100 N·m | 1 |
| Multimeter | Minimum accuracy 0.1 V, 0.01 A | 1 |
| A laser for measuring coincidence | Wavelength 635 nm, accuracy ±0.01 mm | 1 |
| Timer or stopwatch | Response time measurement mode | 1 |
| Paper for documentation | Office sheet | 1 |
| Protective work clothes | Gloves, glasses, protective jacket | 1 set |
4. Before service: Inspection
| Point | Verification | Acceptance/rejection criteria | Notes |
|---|---|---|---|
| 1 | Power outage | There is no electrical conductivity | Apply Lockout/Tagout |
| 2 | Lack of electrical tension | Multimeter measurement: 0 V | Check all tires |
| 3 | Functionality of the measuring device | The multimeter displays accurate values | Check the batteries |
| 4 | Protective means | All items are present and appropriate | Make full use of the facilities |
| 5 | Availability of devices for measuring response time | The stopwatch displays the time | Use digital or mechanical |
5. Passport procedure
- Emergency stop connection installation
Connect the electrical wires to the emergency stop test assembly. Use a multimeter to check that the connection is correct. All contacts must be clean and meet EN 60364. standards
Bug: Incorrect connection may result in incorrect response time measurements or poor functional testing.
- Measuring electrical resistance
Measure the resistance between the emergency stop contacts. Resistance values should be less than 0.1 Ohm. Use the multimeter in resistance (Ω) mode.
Error: High resistance may indicate a lack of contact or damaged wires.
- Response time measurement
Try activating the emergency stop manually or using a test signal. Start a timer on activation and stop it on system response. The response time should not exceed 0.5 seconds.
Bug: Using the wrong timer can lead to incorrect measurement.
- Perform functional check
Perform the emergency stop system start and stop cycle. Check that the system answers all calls. Measure the temperature at the emergency stop contacts - it should not exceed 45°C.
Error: No response may indicate a misconfiguration or malfunction.
- Documentation of results
Record all parameters: resistance, response time, temperature. Keep documentation in electronic form or in traditional paper form. All data must be in accordance with ISO 9001. standards
Error: Lack of documentation may lead to lack of compliance and liability.
6. After service: Inspection
| Test | Expected result | Actual result | Pass/Fail |
|---|---|---|---|
| Functional testing | The system responds to the call | ||
| Response time | ≤ 0.5 s | ||
| Electrical resistance | ≤ 0.1 Ohm | ||
| Contact temperature | ≤ 45°C | ||
| Documentation | Filled and saved |
7. Troubleshooting
| Symptom | Reasons | Restorative actions |
|---|---|---|
| The system does not respond to the call | Incorrect connection, lack of power, contact damage | Check the connection, measure the voltage, restore contact |
| The response time exceeds 0.5 s | Increased resistance, no timer, component damage | Measure the resistance, check the timer, restore the components |
| High contact temperature | Increased resistance, corrosion, damage to contacts | Measure the resistance, clean the contacts, restore the components |
| Lack of documentation | No record, format mismatch | Complete documentation, meet ISO standards |
8. Recommended maintenance schedule
| The task | Frequency | Continuity | Qualification level |
|---|---|---|---|
| Functional testing | Monthly | 15 minutes | Average |
| Response time measurement | Every 3 months | 20 minutes | Average |
| Checking electrical resistance | Every 6 months | 10 minutes | Average |
| Documenting the results | Monthly | 5 minutes | Tall |
9. Reference to spare parts
| Description of the spare part | Typical specification | UNITEC-D category |
|---|---|---|
| Electrical board for emergency stop | Minimum power 100 W, operating temperature up to 70°C | 245-400 |
| Contact group | Material: copper, resistance up to 0.1 Ohm | 245-401 |
| Electric wires | Length up to 10 m, diameter 1.5 mm | 245-402 |
| Protective cable sheath | Material: polyethylene, durability 1000 hours | 245-403 |
Spare parts can be purchased in our e-catalogue: https://www.unitecd.com/e-catalog/
10. Links
- EN 60364: Requirements for electrical systems
- ISO 9001: Quality management system
- UkrSEPRO: State Standards of Ukraine
- DSTU 3030-95: Electrical equipment
- OEM documentation from the manufacturer
