Description
Product Parameters
- Model Number: 8502-BI-DP
- Series: MTL8000 Series / MTL Process I/O
- Protocol: PROFIBUS DP (Decentralized Periphery)
- Data Rate: 9.6 kbps to 12 Mbps (Auto-sensing)
- Bus Interface: 9-pin D-sub female connector (RS-485)
- Status Indicators: LED for Power, Run, Bus Fault, and Internal Fault
- Isolation: 500V AC between PROFIBUS network and I/O backplane
- Power Supply: 24V DC (provided via backplane)
Product Description The MTL 8502-BI-DP is a high-performance PROFIBUS DP Bus Interface (BI) module designed for the MTL8000 distributed I/O system. Its primary role is to bridge the communication between a PROFIBUS DP master (such as a Siemens S7 PLC or a high-level DCS) and the local MTL8000 I/O modules. The module handles all cyclic data exchange, converting the digital signals from the backplane into standard PROFIBUS packets. It is designed for mounting in Zone 2 hazardous areas, provided it is housed in a suitable enclosure, and it supports full GSD-based configuration for easy integration into standard engineering tools.
Application Areas This communication module is widely utilized in process industries where distributed I/O is required over a medium-to-long distance. Common applications include:
- Petrochemical & Refining: Connecting remote I/O drops in process skids to a central control room.
- Water Treatment: Managing widely dispersed field instruments and valves.
- Pharmaceuticals: Distributed control of batch processing units.
- Offshore Platforms: Reducing wiring costs by placing I/O closer to the field devices in hazardous zones.
Product Specifications
- Weight: 0.17 kg
- Dimensions: 110 mm x 22 mm x 105 mm
- Country of Origin: UK / USA
- Mounting: Snaps directly onto the MTL8000 BIM (Bus Interface Module) carrier.
Operational Precautions
- GSD Files: Ensure you have the correct
.GSDfile installed in your PROFIBUS master’s configuration software (e.g., STEP 7 or TIA Portal) to properly map the I/O data. - Network Termination: Standard PROFIBUS rules apply. If the 8502-BI-DP is the first or last device on the network segment, the termination resistor in the 9-pin D-sub connector must be switched to the “ON” position.
- Addressing: The PROFIBUS station address (1-125) must be set correctly using the hardware switches or software tools provided by MTL. Duplicate addresses will cause the entire segment to malfunction.
- Backplane Compatibility: This module must be seated on a compatible MTL8000 carrier. Ensure the pins are clean and the module is fully latched to prevent intermittent “Bus Fault” (BF) errors.
Recommended Similar Product Models
| Model Number | Product Category | Protocol/Feature |
|---|---|---|
| 8505-BI-MB | Bus Interface | Modbus RTU Communication |
| 8507-BI-PN | Bus Interface | PROFINET Communication |
| 8103-HI-TX | I/O Module | 4-20mA Analog Input with HART |
| 8109-DI-DC | I/O Module | 16-Channel Digital Input |
| 8202-HO-IS | I/O Module | Intrinsic Safety Analog Output |
