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RKI Instruments MC-6400 Modbus Controller - 74-7464

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RKI Instruments
RKI Instruments MC-6400 Modbus Controller - 74-7464
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RKI Instruments MC-6400 Modbus Controller - 74-7464

RKI Instruments MC-6400 Modbus Controller - 74-7464


74-7464 MC-6400 Modbus Controller by RKI Instruments

The MC-6400 controller is a 64-channel gas monitoring controller that can communicate with up to 64 gas sensors or transmitters through an RS-485 Modbus communication. Four relays can be individually set up to the full scale gas reading and may be latching or non-latching. Used in conjunction with RKIís transmitters to create a safer working environment.


  • 64 Channel Wired Modbus Controller
  • 12 to 35V DC Operating voltage with an optional AC power supply
  • Operating temperature range of -40°C to +70°C
  • Graphical LCD with LED backlight
  • 5 Push-button interface (ADD, MENU, SUB, SCAN/HOLD and RESET/ESC)
  • 4 configurable alarm set-points: Four front panel ALARM LED indicators (Red); 4 drycontact relays (4 amps maximum per relay)
  • Status LEDs for power and fault: multi-color status light; Amber fault LED for indicating system faults
  • Output options: Wet contact fault terminal, relay 4 can optionally be configured as a fault relay, RS-485 Modbus
  • NEMA-4X weather, water, and chemical resistant enclosure
  • 1-Year limited hardware warranty

*Please note we can only ship RKI products to customers within the United States

Product Type 64 Channel wired Modbus gas monitoring controller
Operating Voltage 12V to 35V DC (standard)
Power Type Wired power
Power Supply 6.25A (150W), 85/264V AC to 24V DC (optional)
Current Draw 275 mA maximum (at 24V DC)
Display Screen 160 x 104 Resolution graphical LCD screen transflective (sunlight readable) with LED back light
Interface 3 Push-buttons (MENU, ADD, SUB, SCAN/HOLD and RESET/ESC)
Product Mounting 4 Mounting feet, 6 in. W x 12-1/4 in. T (included) maximum mounting bolt/screw size of 5/16 in. (8mm) diameter
Temperature Range -20°C to +70°C (-4°F to +158°F)
Product Compatibility M2A, T3A, VOC Pro transmitters
Digital Input Up to 64 individual RKI gas detectors using RS-485 Modbus
Relays • 4 Dry-contact relays with 4 amp replaceable fuses
• Fault terminal
• Optional to disable alarm relay
• Latching and non-latching relay settings
Enclosure Materials NEMA-4X enclosure, waterproof, chemical, and weather resistant
Wiring Hubs Supplied with two 3/4" conduit hubs on bottom of housing. Can be located on sides or top if specified when ordering.
Accessories Optional horn and/or strobe on housing (uses 1 or 2 of available relays)
Product Dimensions 10 in, L x 8 in. W x 6 in. H (Max. dimensions with attachments)
Total Weight 8.5 lbs
Hardware Warranty 1-Year Limited

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