- The MRS-485 monitors sensor type, gas level and trouble status communications
- Communication is on a Modbus serial line
- 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
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 multi-point 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.
By using the Macurco MRS-485 Modbus adapter and 6-Series detectors, the DVP-120M can control up to 87 addressable gas detectors.
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.
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.
| Power & Current (with detector) | 3.25W (max) from 12 to 24VAC or VDC, 85mA in alarm, 60mA fan relay on and 33mA stand by @24VDC |
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| Connections | Plugs/terminals |
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| MRS-485 Operation | RTU Modbus Transmission Mode |
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| Baud Rate | 4800, 9600, 19200 (default), 38400, 57600, 115200 bps |
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| Size | 3.5" x 2" x 1.75" (8.9 x 5.1 x 4.4 cm) |
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| Operating Environment | 0° to 125°F (-18° to 52°C), 10 to 90% RH non-condensing |
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| Shipping Weight | 0.25 lb (0.11 kg) |
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