WOODHEAD DRL-DPM-BKF

Core Technical Specifications

1. PROFIBUS Communication Parameters
   • Supported Protocol: PROFIBUS-DP V0 Class 1 master station, EN 50170 standard compliant
   • Adjustable Baud Rate: 9.6 kbps, 19.2 kbps, 93.75 kbps, 187.5 kbps, 500 kbps, 1.5 Mbps, 3 Mbps, 6 Mbps, 12 Mbps maximum
   • Maximum Slave Station Capacity: Support up to 124 PROFIBUS-DP slave nodes on single bus channel
   • Bus Interface: 9-pin D-SUB female PROFIBUS connector
   • Galvanic Bus Isolation: 2500 Vrms optical isolation between PC104 bus and PROFIBUS bus
2. PC/104 Embedded Hardware Parameters
   • Bus Standard: PC104 16-bit ISA compatible bus, stackable vertical stacking structure
   • On-board Processor: Intel 80486SX 50 MHz industrial embedded CPU
   • On-board Memory: 256 KB SRAM dual-port RAM, expandable to 2 MB optional
   • PC104 Address Range: C8000 ~ DE000 memory address space, occupies 8 KB continuous address segment
   • Power Supply Requirement: +5 VDC, +12 VDC, -12 VDC from PC104 stack bus, total power consumption 10 W
3. Environmental & Mechanical Parameters
   • Operating Temperature: -20°C ~ +70°C continuous operation
   • Protection Level: IP40 for module circuit board, metal housing dust shielding
   • Dimensions: 167 mm × 104 mm × 23 mm standard PC104 single board size
   • Net Weight: 320 g with aluminum heat sink housing

Function Features

• Working Principle: Dual-port shared RAM data exchange architecture; embedded local processor independently processes PROFIBUS-DP bus polling, stores real-time I/O data into dual-port RAM, embedded host CPU reads/writes data via PC104 bus without occupying host main CPU computing resources, realizing low-latency asynchronous communication
• Built-in automatic bus fault diagnosis logic, BF/ST dual-color LED indicators for bus fault and communication running status
• Automatic dual-port RAM mapping (ADM) technology, no complex driver programming required for embedded host
• Supports hot plug detection of PROFIBUS slave devices, real-time slave station online/offline identification
• Integrated watchdog timer, automatically reset bus communication circuit when bus deadlock occurs
• Stackable PC104 structure, can stack multiple communication boards on single embedded host stack without additional expansion chassis
• RoHS compliant lead-free circuit board manufacturing

Material Composition

• Outer Heat Dissipation Housing: Black extruded aluminum alloy with vertical cooling fin structure
• Circuit Substrate: Multi-layer FR4 PCB with anti-oxidation gold-plated PC104 stack connector pins
• Bus Isolation Component: High-speed industrial optocoupler isolation chip
• Connector Hardware: Nickel-plated 9-pin D-SUB PROFIBUS connector, gold-plated PC104 stack header pins
• Internal Storage Chip: Industrial wide-temperature SRAM memory chip with low temperature drift

Structural Characteristics

• Standard PC104 vertical stacking layout, top and bottom full-size stack bus connectors for multi-board stacking
• Front panel independent D-SUB PROFIBUS bus interface, two status LED indicator windows
• Bottom aluminum cooling fin housing covering entire PCB surface for passive heat dissipation
• Four corner mounting screw holes for fixed installation inside embedded industrial box
• Internal separation shielding metal plate between PC104 digital circuit and PROFIBUS analog bus circuit to suppress crosstalk interference

Application Scenarios

• Compact embedded industrial CNC machine tool control systems
• Mobile vehicle-mounted industrial control equipment (portable test machines, mining vehicle controllers)
• Small packaging machine embedded motion control units
• Marine vessel distributed sensor acquisition embedded controllers
• Oil & gas field compact remote monitoring embedded data loggers

Installation Requirements

1. Stack vertically on PC104 embedded host mainboard, align stack connector pins completely without bending pins
2. Maintain 15 mm vertical spacing between stacked boards to ensure air circulation heat dissipation
3. PROFIBUS bus cable must use shielded twisted pair PROFIBUS special cable, shield layer single-end grounding at cabinet side
4. Set memory address dial switch before power-on to avoid address conflict with other PC104 expansion boards
5. Install inside metal embedded control box to shield external electromagnetic interference from frequency converters
6. Operating ambient humidity limited to 10%–80% non-condensing; avoid dew formation on circuit board surface

Operation & Maintenance Precautions

1. Do not plug/unplug PROFIBUS bus connector under powered state, hot plug will damage bus transceiver chip
2. Calibrate bus terminal resistance at both ends of PROFIBUS trunk line; improper terminal resistance causes communication signal attenuation
3. Regularly check stack connector pins for oxidation in high-humidity workshop environments, clean with contact cleaner
4. Do not install module near strong vibration sources; long-term vibration will loosen stack connector pins
5. If BF fault LED lights continuously, check bus short circuit, broken cable or slave station address conflict
6. Store module in anti-static packaging bag when removed from system to prevent static electricity damage to onboard chips