RM550-3K-R02 Programmable Resistive Board Support Open and Short-circuit Output USB-COM/RS485/RS232 (0.7ohm-3kohm/0.02ohm Step)

Introduction:
- The RM550 series economical high-precision programmable resistor module covers an output range of 0.7Ω - 10MΩ (as well as open and short circuit outputs), with a minimum step size of 0.02Ω and a maximum rated power of 4.0W. RM550 performs well across the entire output range (conservative initial accuracy ±0.05% ±1 step @ Tcal ±10℃), making it suitable for applications with slightly higher requirements for accuracy and step size.
- The communication interface of RM550 inherits the USB-COM port of QR10 series, which is plug and play for connecting to a computer. The AT instruction set is convenient for users to debug and test; At the same time, isolated RS-485/232 ports have been added, making it convenient for users to integrate this product into their projects in the form of PCBA modules. In addition, the latest firmware version V0.80 already supports the standard Modbus RTU protocol, making dual protocol usage more user-friendly.
- In addition, the integrated OLED display module displays real-time settings, output values, environmental temperature, and other information, making it convenient to use.

Features:
- The true resistance generated by the relay resistor network supports open and short circuit outputs.
- High performance and economical type.
- Faster output response: The overall switching time of the relay group is less than 7ms.
- Safe and smooth relay group switching logic: During the relay group switching process, there will be no open or short circuit in the output.
- Diverse communication interfaces: The plug and play USB-COM is suitable for human-computer interaction; Isolated RS-485 (suitable for remote module networking); Isolated RS-232 (short-range anti-interference).
- Dual instruction set (firmware version v0.80 and above): Supports both AT instruction set and Modbus RTU protocol simultaneously.
- Large range: 0.7ohm-1.2Mohm (step: approximately 0.125ohm); 0.7ohm-10Mohm (step: approximately 2ohm).
- High precision (at Tcal±10℃): 0.7ohm-1.2Mohm: better than±(0.05%+0.13ohm).
- Standard 1-2W rated power.
- Output threshold security restrictions (user customizable).
- Standard OLED display.
- Optional metal shell, installed with DIN35 rail.
- PCBA small size, compatible with RM55T: 7.5 (length) x 14.2 (width) x 1.7 (thickness) cm

Applicable to:
- Industrial automation testing
- Sensor simulation
- Sensor calibration
- Other applications to replace traditional resistance boxes

Package Included:
- 1 x Programmable Resistive Board   or  1 x Metal Shell