MACURCO MRS-485 RS-485 Adapter

Description of MACURCO MRS-485

Features:

• The Macurco MRS-485 interfaces the detector power and 4-20mA output lines with a mounted connector
• The MRS-485 monitors sensor type, gas level and trouble status communications from any of the Macurco 6-Series detectors
• Communication is on a Modbus serial line
• Commercial type enclosure to protect and support the electronics
• Tricolor LED indicates power, test and communication status

Installation:

• Mounts behind the detector inside of a standard 4” x 4” electrical box
• Held in place on the back of the 6-Series detector with a single screw
• 8 bit dip switch address selector
• RS-485 termination uses 4 pin connector with jumper to select termination:
  The user selects no termination or one of the two Modbus line termination options
• Communications connections include signal (A and B), common and shield terminals
• Intended for use in non-hazardous areas such as parking garages, warehouses or other commercial facilities
• Power & Current (with detector): 3.25W (max) from 12 to 24 VAC or VDC,
  85mA in alarm, 60mA fan relay on and 33mA stand by @ 24 VDC
• Shipping Weight: 0.25 lb (0.11 kg)
• Size: 3 1/2 x 2 x 1 3/4 in. (8.9 x 5.1 x 4.4 cm)
• Operating Environment: 0°F to 125°F (-18°C to +52°C),
  10 to 90% RH non-condensing
• Connections: plugs/terminals
• Mounting screw and screwdriver included
• MRS-485 operates in the RTU Modbus Transmission Mode
• Baud Rate: 4800, 9600, 19200 (default), 38400, 57600, 115200 bps

Gas Detection
The Macurco MRS-485 Adapter converts the Macurco 6-Series 4-20mA analog output to a digital output for use with addressable network systems The Macurco 6-Series is a family of fully programmable, low voltage, dual relay gas detectors, controllers and transducers for BAS, HVAC and Fire & Security applications. The 6-Series detectors are used to measure the concentration of various gas and provide feedback and automatic control to help ensure a safe environment: Carbon Monoxide, Methane, Propane, Hydrogen, Nitrogen Dioxide and other gases.
Connection
The Macurco MRS-485 output is connected via a four terminal screw type connector. The MRS-485 adapter is wired in the standard 2W-Modbus circuits definition with selectable built-in terminating resistors at the ends of the RS-485 bus. The power for the MRS-485 adapter is connected via a two terminal screw type connector, 12 to 24 VAC or 12 to 24 VDC and no polarity. Note: Running the Modbus cable adjacent to or in the same conduit with high voltage wires is not recommended as there may be interference from the high voltages.