Description
Wireless 4-20mA Output Current Loop Transmitter
Introducing the world’s most powerful Wireless 4-20mA Output Current Loop Transmitter. The ASM1-4 makes it easy to control industrial 4-20mA devices with an incredible 2-Mile wireless communication range using 128-Bit AES Encryption. The ASM1-4 is capable of sending up to 4 isolated channels of 4-20mA DC Current to control a wide variety of devices equipped with a 4-20mA input. With nearly a 14-Bit resolution, each output is controlled using a integer value between 0 and 15,525 providing a programmable DC output current output range of 0 to 25mA per channel. Control Dampers, Sprinklers, Flow control Valves, Actuators, Solenoids, and Motor Drives. The 4-20mA Output of the ASM1-4 are compatible with 4-20mA digital panel meters and PLCs that accept a 4-20mA DC current input. Use several ASM1-4 endNodes and talk to each endNode using secure wireless communications. Control wireless 4-20mA outputs on the factory floor, as we have tested this wireless technology in factories in excess of 1 mile indoor line-of-sight with heavy industrial machines operating. This communications technology is rock solid in electrically noisy environments. Control wireless 4-20mA inputs in industrial buildings, as this wireless technology has the best wireless penetration through walls currently available.
The ASM1-4 includes a powerful command set for controlling each 4-20mA output individually or all four outputs simultaneously. When power is lost, the 4-20mA output state may be configured to turn off, return to the last known state, or set all outputs to a predefined startup state. The ASM1-4 command set also supports reading the state of the each output or read the state of all outputs simultaneously, so your software is always synchronized with the 4-20mA output currents.
Wireless Targeting and Mesh Communications
Each endNode controller includes a unique serial number. This serial number is used to target the remote endNode controller with a 4-Channel 4-20mA output control request. Control each endNode up to six times per second using wireless communications. Use a single computer to target several endNode devices in the area or use multiple computers to talk to multiple wireless endNodes. endNodes form a wireless mesh to extend communication range beyond the typical 2-Mile line-of-sight range by hopping data between devices to reach the intended target device. All endNode devices are secured using 128-Bit AES Encryption. NCD endNode devices may also be used to repeat data from NCD Enterprise wireless sensors, as they act as a mesh network of repeaters to help sensors extend the wireless range. All endNode devices are available in 900MHz, 868MHz and 2.4GHz versions, but may have a reduced wireless range when using 868MHz and 2.4GHz options.
Definition of 4-20mA Current Loop Outputs
Current Loop Outputs are best defined as DC outputs that vary the current load from 4 to 20mA. Each 4-20mA output requires a voltage source, which is based on your specific control application. Since each 4-20mA output is isolated, a single supply may be used for all 4-20mA output channels. While the term 4-20mA is commonly used, the actual output range of NCD 4-20mA output is 0 to 25mA. Current below 4mA are typically considered open loop by most receiving devices, which typically identifies as a wiring fault.
USB 4-20mA Current Loop Outputs
All endNode devices are equipped with a USB port. Use the USB interface to control 4-20mA current loop output channels. USB is also used for advanced configuration using our Windows 10 Alpha Station Software. endNode devices mount as a Virtual COM Port on your PC to simplify communications. endNode devices are hardware compatible with Mac and Linux computers, we can assist you in using endNode devices on these platforms, but specific software has not yet been developed. Cross-platform Node-Red support for endNode devices is planned.
Wireless I2C Communications
endNode devices include a I2C expansion port, providing many wireless I2C expansion options. NCD endNode devices convert data from Wireless and USB Communications into I2C Communications using our custom conversion processor. Since I2C communications is the foundation technology for all sensors manufactured today, NCD endNode controllers are capable of communicating to all I2C devices ever manufactured today and well into the future, giving endNode controllers limitless expansion possibilities. I2C plays a major role in IoT applications, as it’s not possible to talk to most sensors without some form of I2C conversion along the way. Because endNode controllers are a data conversion technology, firmware upgrades will not be necessary to add support for future I2C expansions and devices. Here’s a current list of all the I2C devices that will plug into endNode controllers.
ProXR Enterprise Command Set
Use the I2C Expansion port to plug in relays and try out our ProXR Enterprise command set. Turn relays on or off, Trigger relay timers, pulse relays, control relays in sequences, toggle relays, and much more. The ProXR Enterprise command set provides users with simple commands that are converted to low-level I2C commands for relay control applications. Integrated FRAM memory retains relay state when power is removed, and recovers relay state on power-up. Check our our line of I2C Relay controllers compatible with endNode.
endNode Power Requirements
endNode devices were designed to operate continuously from a 9-32V external power supply. A +12VDC international power supply is included. A two-position pluggable terminal block is also included for direct wired applications. A red power LED indicates power status while a RGB LED is used to indicate processor status.