Model-MN-1

Supported Applications

The Dwyer Model MN-1 Mini-Node™ Communication Signal Converter is an economical device designed to convert half-duplex RS-485 serial communications signals into a signal readable by any computer via a USB port. The integral connectors reduce setup time by eliminating extra wiring, making the unit suitable for field installation, control panels, and lab testing.

Operating Conditions & Performance

The Model MN-1 operates without an external power source, drawing 0.4 W directly from the USB connection. The device provides electrical isolation with a rated Isolated Voltage of 3000 VDC and features an Input Impedance of 96 kΩ. It maintains full compliance with the USB V.2.0 specification.

Supported Baud Rates include: 75, 150, 300, 600, 1200, 2400, 4800, 9600, 19200, 38400, 57600, and 115200 bps.

Configuration Options

The series is offered as a single configuration with integral connectivity options:

• USB Connector: B-type (female).
• RS-485 Connector: RJ-45.
• PIN Configuration: Pin 4 is designated SG+ (Red) and Pin 5 is designated SG- (Green); Pins 1, 2, 3, 6, 7, and 8 are Reserved.

The unit carries CE compliance. Physical dimensions for the Model MN-1 are listed as 3-13/64 in [81.36 mm] (length), 57/64 in [22.62 mm] (diameter), and 27/32 in [21.43 mm] (width).

Key Product Differences

The Model MN-1 is the sole model within this series, described as a Mini-Node™ USB to RS-485 converter. The device is not field serviceable; if repair is needed, it should be returned rather than attempting on-site repairs.