MTL 8715-CA-BI HART Transparent Isolator
The MTL 8715-CA-BI is a HART transparent isolator and Profibus DP Bus Interface Module (BIM) for the MTL8000 Series intrinsically safe I/O system. It serves as the communication gateway between MTL8000 Series I/O nodes and a Profibus DP master controller, providing bidirectional HART communication for remote configuration and diagnostics of smart field instruments located in hazardous areas. The module also provides galvanic isolation (1500V AC) between hazardous and safe area circuits, preventing fault propagation and ground loops.
Technical Specifications
Product Type: HART transparent isolator / Bus Interface Module (BIM)
Series: MTL8000 Series
Communication Protocols: Profibus DP, Modbus, Ethernet
Profibus DP Data Rate: 9.6 kbaud to 12 Mbaud
HART Communication: Bidirectional transparent pass-through (1200 bps)
Isolation Voltage: 1500 V AC (between hazardous and safe area circuits)
Frequency Response: DC to 10 kHz
Linearity Error: ±0.1%
Input Signal: 4-20 mA DC, 1-5 V DC (from field devices)
Output Signal: 4-20 mA DC, 1-5 V DC (to control system)
I/O Expansion Capacity: Up to 24 I/O modules per BIM
Power Supply: 24 V DC (18-32 V DC)
Current Consumption: 100 mA typical
Operating Temperature: -20°C to +60°C
Storage Temperature: -20°C to +85°C
Relative Humidity: 5% to 95% (non-condensing)
Protection Rating: IP20
Mounting: 35mm DIN rail
Dimensions: 22.5 mm × 99 mm × 114 mm
Weight: 0.16 kg
Configuration Storage: Non-volatile memory (retains settings on power loss)
Certifications: Intrinsic safety (ATEX, IECEx), CE
HART Transparent Isolation
The MTL 8715-CA-BI provides bidirectional HART transparent isolation, allowing digital HART communication signals to pass through the barrier without attenuation or filtering. This enables operators to remotely configure, calibrate, and diagnose HART-enabled smart transmitters and valve positioners located in hazardous areas using a HART communicator or asset management software from the safe area. The module's 1500V AC isolation ensures complete electrical separation between hazardous and safe area circuits, preventing fault currents from crossing the barrier. The module also functions as a Profibus DP Bus Interface Module, connecting up to 24 MTL8000 Series I/O modules to a Profibus DP control system. Its ultra-slim 22.5mm width allows high-density mounting in control cabinets.
Application Domains
The MTL 8715-CA-BI is used in oil and gas production facilities for remote I/O and HART instrument management, chemical plants for distributed control with smart field devices, pharmaceutical manufacturing for sterile process monitoring, power generation for turbine and boiler instrumentation, and water/wastewater treatment for chemical dosing and level monitoring.
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