MTL 5517 Two-Channel Switch

Technical Specifications

Electrical Parameters
- The intrinsic safety parameters for hazardous area terminals include an open – circuit voltage of 10.5V, a short – circuit current of 14mA, and zero input capacitance and inductance. The maximum voltage tolerance for related circuits reaches 253V RMS.
- The safe – area relay contacts can switch up to 253V RMS, 2A RMS and 100VA. In Zone 2, the relay contacts can switch up to 35V, 2A and 100VA, and the DC supply voltage for specific non – hazardous area circuits can be up to 35V.
- The maximum current consumption is 35mA at 24V DC, and the corresponding power dissipation is 0.84W.
Response and Environmental Parameters
- The maximum response time of the module is 10ms, ensuring rapid response to signal changes and fault events in the field.
- The operating temperature ranges from -20°C to +60°C. It requires installation in an enclosure with at least IP54 protection level when used in Zone 2.

Category: Others

Description

- Mechanical Parameter
  - It adopts a standard DIN rail mounting method that is consistent with other modules in the 5500 series, facilitating unified and intensive installation in industrial control cabinets.
Functional Features
- Two – Channel Independent Control
  - The module has two independent channels that can simultaneously connect two sets of detection equipment in hazardous areas to loads in safe areas. Each channel operates independently without mutual interference, which improves the efficiency of equipment connection and meets the control needs of multiple detection points in industrial sites.
- Reliable Line Fault Detection and Alarm
  - It is equipped with a dedicated line fault detection function, and is fitted with red LED indicators for fault warning. When line faults occur, the indicators light up to remind on – site personnel, enabling quick troubleshooting and reducing system downtime.
- High Safety and Multiple Certifications
  - It effectively limits the energy transmitted to hazardous areas to prevent ignition of flammable gases and dust, ensuring safe operation in explosive environments. Its multiple international certifications allow it to be deployed in industrial sites across different countries and regions.
- Superior Functional Safety Performance
  - It meets the requirements of IEC 61508 functional safety standards. The simplex configuration meets SIL2 requirements, and the redundant configuration can achieve SIL3. This enables it to adapt to industrial scenarios with different safety level demands, from general process control to high – risk safety systems.
Application Scenarios
- Oil and Gas Industry
  - It is installed on offshore drilling platforms and onshore oil refineries to connect proximity detectors on pipelines and storage tanks in Zone 0 hazardous areas with alarm devices and control relays in safe areas. It realizes real – time monitoring of equipment positions and pipeline states, and timely fault alarms avoid safety accidents such as oil and gas leaks.
- Chemical Plants
  - In production workshops involving flammable and explosive chemical raw materials, it links switches and detectors on reaction kettles and mixing equipment with safe – area control loads. It ensures reliable transmission of start – stop signals and position detection signals, and its fault detection function prevents production disruptions caused by line failures.
- Pharmaceutical Production
  - In pharmaceutical workshops with strict safety and hygiene requirements, it is used to connect proximity detectors on automated conveying equipment and packaging lines with safe – area control systems. It ensures the safe and stable operation of the production line, and its isolating function prevents electrical hazards from spreading to the production area, complying with pharmaceutical production specifications.
- Mining Industry
  - In underground mines with flammable gas and dust, it connects proximity detectors on mining machinery and transportation equipment with ground – based safe – area monitoring devices. It achieves remote monitoring of underground equipment operations, and its intrinsic safety performance eliminates the risk of spark ignition, ensuring the safety of mining operations.
- Power Generation Industry
  - In coal – fired and gas – fired power plants, it is applied in hazardous areas such as boiler rooms and gas transmission pipelines. It connects detectors for valve positions and pipeline pressure with safe – area control relays, ensuring stable signal transmission in high – temperature and dusty environments and supporting the stable operation of power generation equipment.

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