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This equipment may not function effectively below 0°F or above 125°F (-18°C or above 52°C). Using the detector outside of this
temperature range may adversely affect product performance and result in sickness or death.
General Description
The Macurco MRS-485 adapter is an accessory used to convert the 4-20mA analog signal from Macurco 6-Series type detectors to
a digital signal for use with multipoint addressable systems. The Macurco MRS-485 simply plugs into the back of the detector and a
single screw fastens it in place. The MRS-485 accepts the 4-20mA output and is powered from the same connection as the
detector. The MRS-485 has the ability to interface with Building Automation Systems, Control Panels or other Control Devices that
accept Modbus communications.
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 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
Specifications
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
Color: Black
Mounting screw and screwdriver included
MRS-485 operates in the RTU Modbus Transmission Mode
Baud Rate: 4800, 9600, 19200 (default), 38400, 57600, 115200 bps
Parity: Odd, Even (default) and None
! WARNING
