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Macurco MRS-485 Modbus RS-485 Adapter
2.1
Use For
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 gases and provide feedback and automatic control
to help ensure a safe environment: Carbon Monoxide, Methane, Propane, Hydrogen, Nitrogen Dioxide and
other gases.
2.2
Do NOT use for
The MRS-485 is not intended for use in hazardous locations or industrial applications such as refineries, chemical
plants, etc. Do not mount the MRS-485 where the normal ambient temperature is below 0°F or exceeds 125°F (-
18°C or above 52°C). The MRS-485 mounts to a Macurco 6-Series detector installed on a 4" x 4" electrical box
electrical box supplied by the contractor.
2.3
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 with a "Two-Wire" electrical interface in accordance with
EIA/TIA-485 standard using RTU Transmission Mode
•
Commercial type enclosure to protect and support the electronics
•
Tricolor LED indicates power, test and communication status
•
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 connectors 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
REV – 1.0
[34-2900-0019-8]
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P a g e
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